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1985 Trans AM w T-Tops & 5-Speed Manual

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Old Oct 4, 2022 | 03:33 PM
  #1  
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
1985 Trans AM w T-Tops & 5-Speed Manual

$8,500.00

158K Miles

REBUILT Carburetor
REMANUFACTURED Alternator
REMANUFACTURED Power Steering Pump
COATED Tri-Y Headers
POLISHED OEM Wheels Front & Rear

NEW A-Pillar Trim
NEW Alternator Belt
NEW Alternator Fan
NEW Alternator Pulley
NEW Alternator Bracket
NEW Air Filter
NEW Air Cleaner Base & Bolt
NEW Air Cleaner Lid
NEW Air Cleaner Gasket
NEW Battery Terminals
NEW Breather Filter
NEW Brake Rotors (Front)
NEW Brake Pads (Front)
NEW Clutch
NEW Coolant Reservoir & Hose
NEW Coolant Sensor
NEW Clutch Slave
NEW Distributor
NEW Distributor Cap & Rotor
NEW EGR Block-Off Plate w Bolts & Gasket
NEW Electromechanical Flasher
NEW Exhaust Gaskets
NEW Fan Clutch
NEW Flywheel
NEW Fuel Pump & Gasket
NEW Fuel Pump Hoses & Clamps
NEW Guage Cluster Bulbs
NEW Header Gaskets
NEW Ignition Coil
NEW Ignition Cylinder & Keys
NEW Intermediate Exhaust Pipe
NEW LED Bulbs
NEW Lug Nuts
NEW Muffler
NEW Panhard Bar Nuts & Bolts
NEW PCV Valves
NEW Power Steering Pump Belt
NEW Power Steering Pump Pulley
NEW Power Steering Pump Bracket
NEW Power Steering Pressure Line
NEW Power Steering Reservoir Cap
NEW Pressure Plate
NEW Oil Pressure Switch
NEW Radiator Bracket & Bolts
NEW Radiator and Cap
NEW Radiator Hoses & Clamps
NEW Shocks
NEW Shifter
NEW Shifter Boot
NEW Shifter Seal
NEW Slip Yoke
NEW Spark Plugs
NEW Spark Plug Wires
NEW Spindle Nut
NEW Spindle Washer
NEW Starter
NEW Starter Heart Shield
NEW Struts
NEW Sway Bar End Links (Rear)
NEW Tail Pipes
NEW Tires (Front)
NEW Thermostat
NEW Thermostat Housing w Bolts & Gasket
NEW Throw-out Bearing
NEW Transmission Crossmember Bolts
NEW Transmission Yoke
NEW Transmission Fluid
NEW Transmission Mount
NEW Turn Signal Flasher
NEW U-Joints
NEW Valve Stems
NEW Valve Covers w Bolts & Gaskets
NEW Vacuum Hoses
NEW Water Pump w Bolts & Gaskets
NEW Wheel Bearings (Front)
NEW Wheel Seals (Front)
NEW Water Pump Pulley
NEW Window Wipers
NEW Window Washer Fluid Reservoir
NEW Y-Pipe

USED Panhard Bar
USED Lower Control Arms
USED Driveshaft
USED Center Console from a 2001 Camaro SS

A work in-progress, updates to follow...

Last edited by SixSeriesCSi; Nov 11, 2025 at 10:31 AM. Reason: ADDED Parts & Price UPDATE
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Old Oct 4, 2022 | 06:49 PM
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From: Oyth
Car: 89RS vert
Engine: Erod
Transmission: 4L65e
Axle/Gears: BW, 3.27
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

For sale or purchased for?
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Old Oct 4, 2022 | 07:41 PM
  #3  
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

LOL

For Sale
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Old Oct 5, 2022 | 12:39 PM
  #4  
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From: Oyth
Car: 89RS vert
Engine: Erod
Transmission: 4L65e
Axle/Gears: BW, 3.27
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

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Old Oct 6, 2022 | 08:47 AM
  #5  
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Car: 1992 Chevy Camaro
Engine: L31
Transmission: FTI built 4L60
Axle/Gears: 3.42 from an 02 SS
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

Any pics?
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Old Dec 20, 2022 | 06:01 PM
  #6  
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

Originally Posted by Pyramid_Head
Any pics?
Yes, here are some progress photos


Oil & Filter @ 158,197mi for $36.88

Aluminum Valve Covers $40.00 and Valve Cover Bolts $13.19 (not pictured) & Gaskets $40.38

Carburetor Fuel Filter $4.84

Vacuum Hose $5.50

Vacuum Hose $5.50

Mechanical Fuel Pump $27.55

Fuel Pump Gaskets $5.50

Remanufactured Alternator $42.47 with March Performance Billet Aluminum Alternator Pulley & Fan

Oil & Filter @ 158,050mi for $27.55

Last edited by SixSeriesCSi; Sep 6, 2024 at 10:01 AM. Reason: Added Parts
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Old Dec 20, 2022 | 08:40 PM
  #7  
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From: Rochester NY
Car: 1984 TA (1 stock / 1 custom)
Engine: LG4 / turbo LQ4
Transmission: 700R4 / 4L80E
Axle/Gears: Stock / 3:50 Moser 9"
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

If you’re actually trying to sell this car, why are you only showing the $200 in random parts you bought??? No one is buying this car because you are including replacement wear parts. Post some pictures of the whole car - interior and exterior.
You’ll also probably have better luck posting this in the classifieds Cars for Sale section (if you haven’t done that already).
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Old Dec 21, 2022 | 10:45 AM
  #8  
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

Originally Posted by battmann
If you’re actually trying to sell this car, why are you only showing the $200 in random parts you bought??? No one is buying this car because you are including replacement wear parts. Post some pictures of the whole car - interior and exterior.
You’ll also probably have better luck posting this in the classifieds Cars for Sale section (if you haven’t done that already).
Well, I have two other Firebirds. This “For Sale” Ad is just something that’s sensible as three ThirdGen’s isn’t that reasonable… If it doesn’t sell that’s okay, I’m going to enjoy the T-Tops & Manual Transmission.
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Old Dec 21, 2022 | 11:09 AM
  #9  
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From: Rochester NY
Car: 1984 TA (1 stock / 1 custom)
Engine: LG4 / turbo LQ4
Transmission: 700R4 / 4L80E
Axle/Gears: Stock / 3:50 Moser 9"
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

That’s fine. I think you’ll have a better shot at selling if people can see the car they’re getting. I’m just trying to be helpful.
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Old Jan 3, 2023 | 04:16 PM
  #10  
SixSeriesCSi's Avatar
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual


Distributor Cap & Rotor $48.50 & Coil $50.00 (not pictured)

Last edited by SixSeriesCSi; Mar 6, 2024 at 12:41 PM. Reason: ADDED Parts
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Old Feb 12, 2023 | 10:58 AM
  #11  
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual


Radiator $0.00 & Radiator Cap $9.36

Last edited by SixSeriesCSi; Feb 18, 2023 at 08:33 PM. Reason: AutoZone Limited Lifetime Warranty
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Old Feb 12, 2023 | 11:03 AM
  #12  
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From: Oyth
Car: 89RS vert
Engine: Erod
Transmission: 4L65e
Axle/Gears: BW, 3.27
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

Thats a hell of a discount!
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Old Feb 13, 2023 | 09:19 AM
  #13  
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From: South dallas
Car: 1988 gta
Engine: 5.7
Transmission: 700r4
Axle/Gears: 3.27 posi with discs
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

Were there ever any pictures of the actual car ? I don't seem to see them. It's like trying to sell a house and you post a picture of a rake in your garage.
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Old Feb 13, 2023 | 10:41 AM
  #14  
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From: Rochester NY
Car: 1984 TA (1 stock / 1 custom)
Engine: LG4 / turbo LQ4
Transmission: 700R4 / 4L80E
Axle/Gears: Stock / 3:50 Moser 9"
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

No pics of the vehicle have been posted yet - just the parts I assume you’ll get if you buy the mystery car.
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Old Feb 18, 2023 | 08:23 PM
  #15  
SixSeriesCSi's Avatar
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

Originally Posted by 84 1LE
Thats a hell of a discount!
It’s the AutoZone Limited Lifetime Warranty

I only paid for the Radiator Cap @ $8.49 +10.250% LA County Sales Tax = $9.36
I’ll edit the caption to reflect $0.00 for the Radiator.

Last edited by SixSeriesCSi; Mar 23, 2023 at 12:47 AM. Reason: Grammar
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Old Feb 18, 2023 | 08:43 PM
  #16  
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From: South dallas
Car: 1988 gta
Engine: 5.7
Transmission: 700r4
Axle/Gears: 3.27 posi with discs
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

I would normally think you're just trolling us. But you're a senior member. So I don't really know what to think.
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Old Feb 18, 2023 | 11:00 PM
  #17  
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

Well, speaking of the AutoZone Limited Lifetime Warranty

I returned a replacement Water Pump from my retired, 1990 Trans AM for $31.99 in credit towards my purchase and I paid the difference.


Heavy Duty Water Pump $33.08

Last edited by SixSeriesCSi; Mar 2, 2023 at 11:37 PM. Reason: Grammar
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Old Feb 20, 2023 | 11:00 AM
  #18  
SixSeriesCSi's Avatar
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual


EGR Block-Off Plate and Gasket @ $19.96 + Bolts & Washers (not-pictured) @ $7.53

Last edited by SixSeriesCSi; Feb 25, 2023 at 08:30 PM. Reason: Added Parts
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Old Feb 20, 2023 | 11:40 AM
  #19  
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From: South dallas
Car: 1988 gta
Engine: 5.7
Transmission: 700r4
Axle/Gears: 3.27 posi with discs
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

How do I get off of this ride?
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Old Feb 20, 2023 | 12:17 PM
  #20  
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

Originally Posted by Bishopts
How do I get off of this ride?
Are you not entertained?

Use the option to unsubscribe, listed under “Thread Tools” or use the drop-down from your username to manage your “Subscribed Threads”.
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Old Feb 25, 2023 | 11:02 PM
  #21  
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

More cost-savings via the AutoZone Limited Lifetime Warranty

The Coolant Temperature Sensor was no-charge and the Thermostat was covered with my AutoZone Rewards. The EGR Valve was removed (post #18) so the TV Switch will be blocked-off with an Aluminum Plug. A 160F or 71C Thermostat was selected from Moto-Rad which is the same Brand as the Radiator Cap (post #11).


Temperature Coolant Sensor $0.00, Thermostat $0.00, Thermostat Housing & Gasket $16.53, Thermostat Gasket Sealer $2.19, Thermal Vacuum Switch Plug $4.54 and Thermostat Housing Bolts $4.83 (not pictured).

Last edited by SixSeriesCSi; Mar 7, 2023 at 10:02 PM.
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Old Mar 3, 2023 | 12:30 PM
  #22  
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

The price difference between an aluminum & cast iron Water Pump was only $1.00 but had to be special ordered, so the previous Water Pump (post #17) was returned.


Aluminum Heavy Duty Water Pump $1.11, Water Pump Bolts $10.40 & Lock Nuts $4.40 (both, not pictured).

Last edited by SixSeriesCSi; Aug 30, 2023 at 11:31 PM.
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Old Mar 7, 2023 | 10:08 PM
  #23  
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual


Upper Radiator Hose $15.90, Lower Radiator Hose $17.63, Radiator Hose Clamps $4.52 & Coolant $25.35 (not pictured)

Last edited by SixSeriesCSi; Jun 16, 2025 at 09:35 PM.
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Old Mar 23, 2023 | 12:45 AM
  #24  
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

In the Coolant System overhaul I’ve saved a lot of money through the AutoZone Limited Lifetime Warranty

Therefore, I splurged on these solid billet 6061-T6 aluminum pieces from March Performance.


Alternator Bracket $80.47 & Bolts $10.81

Water Pump Pulley $97.01

Last edited by SixSeriesCSi; Sep 6, 2024 at 10:01 AM. Reason: Added Bolts and pricing
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Old Mar 23, 2023 | 07:33 PM
  #25  
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Re: 1985 Trans AM w T-Tops & 5-Speed Manual

Starting to wonder for sale or build/maintenance thread, lol
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Old Mar 24, 2023 | 01:42 PM
  #26  
SixSeriesCSi's Avatar
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

Originally Posted by tajefe
Starting to wonder for sale or build/maintenance thread, lol
Like sand through an hour glass, only time will tell… LOL!
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Old Mar 27, 2023 | 10:38 PM
  #27  
SixSeriesCSi's Avatar
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

The cost-savings in the Coolant System overhaul continue with this eBay “Best Offer” special.


Stainless Steel Heater Hose Kit & Aluminum Covers $38.59
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Old Apr 17, 2023 | 10:13 PM
  #28  
SixSeriesCSi's Avatar
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

Lots of aftermarket parts, opted for Genuine GM this time around…


Coolant Reservoir $37.18 & Coolant Reservoir Cap $8.62

Last edited by SixSeriesCSi; Sep 6, 2023 at 11:34 PM.
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Old May 19, 2023 | 08:51 AM
  #29  
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From: Orange County, CA
Car: 84 Trans Am T-TOP, 84 Trans Am Hard
Engine: 5.0 Liter HO, 305 H.O.
Transmission: T5, 700R4
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

Ok, I will bite. I am coming over with cash in my hands.
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Old May 22, 2023 | 11:23 AM
  #30  
SixSeriesCSi's Avatar
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

Originally Posted by dantman
Ok, I will bite. I am coming over with cash in my hands.
Unfortunately, the project is at a bit of a standstill at the moment. My OCD derailed the Coolant System overhaul as I've spent too much time polishing the Water Pump.

Updates to follow, hopefully sooner than later...
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Old Jun 27, 2023 | 09:33 PM
  #31  
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual


Bellflower, CA
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Old Jul 17, 2023 | 10:50 AM
  #32  
SixSeriesCSi's Avatar
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual


Fan Clutch $69.45 and Washers $1.51 (not pictured).
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Old Jul 20, 2023 | 11:32 PM
  #33  
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

The original Washer Tank Cap doesn’t fit with this replacement, not sure what Brand?


Windshield Washer Tank $47.40

Last edited by SixSeriesCSi; Aug 27, 2023 at 09:08 PM.
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Old Aug 4, 2023 | 12:52 AM
  #34  
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

Hurst discontinued the 391 5032 Billet/Plus Competition Shifter for the Borg-Warner T-5 Manual Transmission but thanks to @StunMan I’ll be installing one in the Trans AM



Shifter $170.00 and lower Oil Seal $9.42
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Old Aug 10, 2023 | 01:25 AM
  #35  
SixSeriesCSi's Avatar
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

My previous Trans AM had dimpled Wheels but thanks to @Dyno Don this Trans AM will have non-dimpled Rear Wheels & Tires.


Wheels & Tires $100.00, Sandblasting $50.00, Polishing $90.00, Wheel Repair $35.00, Mounting & Balancing and Valve Stems $.$$, Lug Nuts $28.65 (not pictured).

Last edited by SixSeriesCSi; Sep 3, 2023 at 10:28 PM.
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Old Aug 27, 2023 | 08:55 PM
  #36  
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

Had the Carburetor redone @ Freddy’s Carburetor in Paramount, CA.


Carburetor Labor & Parts $400.00 and Air Cleaner Gasket $3.53 (not pictured).

Last edited by SixSeriesCSi; Oct 13, 2025 at 11:15 PM.
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Old Aug 27, 2023 | 09:05 PM
  #37  
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

Many Moons ago, I bought a set of USED Doug Thorley Tri-Y Headers (#375Y) and had a Thermal Ceramic Coating applied @Embee Performance.

Needed some Adapters, Gaskets, Hardware & Spark Plug Wires for the installation and @Team C Performance in Bellflower had them in-stock.


Header Adapters $38.57

Header Gaskets $30.86

Header Bolts $18.72

Spark Plug Wires $60.58

The best price I found for a shipped Intermediate Pipe was from AP Exhaust - XLERATOR X5500. Which is a nice 3” mandrel bent pipe made out of prime steel.


Intermediate Pipe $93.26

Displeased with the Exhaust Hanger from the Intermediate Pipe being cutoff and replaced with a generic Exhaust Hanger bolted & welded to a different location. Would rather have utilized the original design and location because now it’s crooked!

The Muffler was also a great price! Chassis specific since it’s a FLOWMASTER 80 - Series Street Muffler 42583 for single inlet & dual outlet.


Muffler $50.00 / Tailpipes $71.14

Labor & Misc. Parts $900.00

Labor was performed by Express Auto Repair in Bellflower, CA.

The OEM dipstick was replaced.

Installation of Starter; I choose an updated LT1 design (post #38) which required a NEW positive Battery Cable & Battery Terminal Adapter to be fitted and routed. Unfortunately, this was very poorly done and I’ll need to redo.

Installation required a NEW Clutch Cylinder due to an issue that arose from its proximity to the header (post #39).

The Y-Pipe looks like some generic piece from overseas.



Last edited by SixSeriesCSi; Oct 13, 2025 at 11:20 PM.
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Old Sep 6, 2023 | 11:30 PM
  #38  
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

Kudos to the AutoZone Limited Lifetime Warranty

I returned a replacement Starter from my inactive, 1989 Firebird Formula 350 for $96.99 in credit towards my purchase and I paid the difference.
& $1.28 in AutoZone Rewards for the Design Engineering, Inc. Versa-Shield in an attempt to preserve the Starter from any heat not contained by the Thermal Ceramic Coating.


Starter $83.22 & Heat Shield $27.37 (not pictured).

Last edited by SixSeriesCSi; Mar 4, 2025 at 11:13 AM. Reason: Grammer
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Old Nov 24, 2023 | 09:25 PM
  #39  
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

The installation of the Doug Thorley Tri-Y Headers (# 375Y) encountered a major hurdle due to the Clutch Cylinder coming into contact with the Header on the Driver’s Side. The issue was two-fold as the original Clutch Cylinder was made of plastic. Therefore, an aftermarket design in aluminum was selected. The original Clutch Cylinder Shield could not be reused. So, some Reflect-A-GOLD high-temperature heat reflective wrap was used to minimize the heat transfer. The header primary tube also required a small dent to avoid direct contact.


Clutch Cylinder $44.09
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Old Nov 24, 2023 | 09:55 PM
  #40  
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

The Power Steering System overhaul was complicated by some incorrect product descriptions & part numbers on Amazon and numerous belt exchanges @AutoZone due to sizing.


Power Steering Pump $39.68, Power Steering Pump Bracket $0.00. Not pictured: Power Steering Pump Pulley $0.00, Power Steering Pressure Line $24.24, Power Steering Reservoir Cap $X.XX, Power Steering Return Line $X.XX

Last edited by SixSeriesCSi; Aug 26, 2024 at 01:23 PM. Reason: Pricing
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Old Nov 26, 2023 | 12:23 AM
  #41  
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual


Alamitos Bay Marina, CA
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Old Nov 26, 2023 | 03:30 AM
  #42  
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Car: 89RS vert
Engine: Erod
Transmission: 4L65e
Axle/Gears: BW, 3.27
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

Thats the first 9 bolt ive seen with drum brakes. I'd read they were all posi/disc.
Originally Posted by SixSeriesCSi

Muffler $50.00 / Tailpipes $71.14
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Old Nov 26, 2023 | 05:40 PM
  #43  
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

Originally Posted by 84 1LE
Thats the first 9 bolt ive seen with drum brakes. I'd read they were all posi/disc.
RPO Code: GW6 - AXLE, REAR 3.27 RATIO

Unfortunately, it’s not POSI-TRACTION/LIMITED SLIP.
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Old Nov 26, 2023 | 08:13 PM
  #44  
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From: Oyth
Car: 89RS vert
Engine: Erod
Transmission: 4L65e
Axle/Gears: BW, 3.27
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

Pretty rare those are not disc and posi. Now that i think about it, i believe only the drum units were open diffs. I know i read that somewhere.
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Old Feb 10, 2024 | 07:00 PM
  #45  
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

The original Hood decal had faded and it was cheaper to buy another Hood with an aftermarket decal then replace the decal.

Hood $100.00 via OfferUp


Bellflower, CA

Last edited by SixSeriesCSi; Jun 9, 2024 at 10:19 PM.
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Old Feb 10, 2024 | 07:55 PM
  #46  
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual


Oil & Filter @ 158,348mi for $46.69, Motor Flush $8.81 & Oil Stabilizer $0.94 ($20.00 AutoZone Rewards)
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Old May 17, 2024 | 05:18 PM
  #47  
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual


Combo Package for Rear Shocks & Front Struts $112.87
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Old May 17, 2024 | 06:25 PM
  #48  
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Car: 1984 Trans Am
Engine: 350
Transmission: Manual
Re: 1985 Trans AM w T-Tops & 5-Speed Manual


Did we ever find out if this was a build post or a car for sale post?
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Old May 17, 2024 | 09:22 PM
  #49  
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From: Oyth
Car: 89RS vert
Engine: Erod
Transmission: 4L65e
Axle/Gears: BW, 3.27
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

Originally Posted by SixSeriesCSi
Combo Package for Rear Shocks & Front Struts $112.87
Where did you get those? Never seen that brand before.
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Old May 17, 2024 | 11:10 PM
  #50  
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1985 Trans AM w T-Tops & 5-Speed Manual

Originally Posted by 84 1LE
Where did you get those? Never seen that brand before.
Purchased from RockAuto; Brand is Monroe, Made in USA!
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