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Transmissions and Drivetrain Need help with your trans? Problems with your axle?

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Old 06-23-2008, 09:13 PM   #1
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Join Date: Jan 2003
Location: Worcester, MA
Posts: 1,782
Car: 1987 Camaro Z28
Engine: 335 TPI Stroker
Transmission: Tremec TKO 500
Axle/Gears: 10 bolt / 3.42

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Tremec TKO 500 speedo question

Hey everyone been awhile since i posted.

A couple weeks ago i swapped a Tremec TKO 500 into my Camaro. So far everything works great. I was told that a T5 speedo adapter would work, so i went to my GM dealer and bought the metal "sleeve" and the appropriate gear for my 3.42s.

When i went to put the sleeve into the tranny, it seemed like it was too big in diameter. i didn't want to force it and screw something up so i just put a rubber plug in the tranny and have been driving it without a speedo.

Is my only option the adapter that Forte's makes for the TKO?? Or am i just being a sally and should wack that thing into the tranny
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1987 Camaro Z28- 335ci TPI stroker, Tremec TKO 500 trans, 3.42 10 bolt
1994 Corvette - 355ci LT1, LT4 Hot Cam, Bolt ons, Z07 suspension (1 of 887 that year)
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Old 06-24-2008, 06:26 PM   #2
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Join Date: Aug 2006
Location: Central NJ
Posts: 10,299
Car: 86 Trans Am, 92 Firebird
Engine: 408 sbc, 3.1L of raw power
Transmission: TKO600, 700r4
Axle/Gears: Moser 9", 3:70 trutac, open 3:23

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Re: Tremec TKO 500 speedo question

you need his adapter, which i have laying around if you are interested, i will never use it.

I used the ford output on the trans and a dakota digital box, though i assume you have a cable driven speedo? Does his adapter work with a cable driven speedo
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Old 06-24-2008, 06:46 PM   #3
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Join Date: Jan 2003
Location: Worcester, MA
Posts: 1,782
Car: 1987 Camaro Z28
Engine: 335 TPI Stroker
Transmission: Tremec TKO 500
Axle/Gears: 10 bolt / 3.42

Classifieds Rating: (0)
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Re: Tremec TKO 500 speedo question

Is your adapter cable or electric?


My car is a '87 so its a cable speedo, i did some research and found JAM performance sells both a cable and electric adapter for the TKO 500. I left them a message so hopefully they get back to me tomorrow.

I have an adapter sleeve for a T5 with the 19 tooth gear which cost me $51 and isn't returnable. Since the gear is attatched to the metal shaft, would i be able to use my gear with the aftermarket adapter?

Here is fortes peice for the cable ones

http://www.5speedtransmissions.com/gmspeedoadapter.html
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1987 Camaro Z28- 335ci TPI stroker, Tremec TKO 500 trans, 3.42 10 bolt
1994 Corvette - 355ci LT1, LT4 Hot Cam, Bolt ons, Z07 suspension (1 of 887 that year)

Last edited by TunedPort 335; 06-24-2008 at 06:53 PM.
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Old 06-24-2008, 06:50 PM   #4
86Z
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Join Date: Jul 1999
Location: CT
Posts: 1,640
Car: 1986 Camaro SC
Engine: 305 TPI Procharged D1SC
Transmission: Tremec TKO-600
Axle/Gears: Moser 12 Bolt 3.73 posi

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Re: Tremec TKO 500 speedo question

hey, i'm using the fortes mechanical speedo adapter in my tko, i told him the tire/gear size and he installed the correct gear, works good, i had to trim my speedo cable some to fit in it..

on a side note, i wanna see your car in person!! check out nec-f.org
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1986 Camaro 305 TPI Conversion, Accel Base / Runners / AFPR, Holley 52mm TB, FMS 42# Injectors, 7749 with $59 3-bar map, WP 305 S/R Torquer Heads, Crane Powermax 2032 Roller cam, CompCams 1.6 Magnum Roller Rockers, Hedman Coated Headers, Edelbrock Cat-Back, Tremec TKO-600 with CF DF Clutch, Lakewood Scattershield, Moser 12 Bolt 3.73 Posi rear, Spohn LCA's & Relocation brackets, Lakewood adj panhard. 36/24 Swaybars, Spohn Subframe Connectors, Spohn TKO Crossmember with DS Loop, Spohn Steel Driveshaft, Hotchkis Strut Brace, Eibach Pro-Kit, Tokico Illumina Struts and Shocks, Procharger D1SC 12#'s, LS1 Brakes Front, Wilwood Pro Series Rear. 381HP/400FT/LB's on 10#'s of boost

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Old 06-24-2008, 06:58 PM   #5
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Join Date: Jan 2003
Location: Worcester, MA
Posts: 1,782
Car: 1987 Camaro Z28
Engine: 335 TPI Stroker
Transmission: Tremec TKO 500
Axle/Gears: 10 bolt / 3.42

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Re: Tremec TKO 500 speedo question

Alright looks like thats what i need, i'll order it up tomorrow


Thanks for the help guys !
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1987 Camaro Z28- 335ci TPI stroker, Tremec TKO 500 trans, 3.42 10 bolt
1994 Corvette - 355ci LT1, LT4 Hot Cam, Bolt ons, Z07 suspension (1 of 887 that year)
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Old 06-25-2008, 12:52 PM   #6
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Join Date: Dec 2006
Posts: 218
Car: 1984 camaro z28
Engine: 350sbc
Transmission: TKO 600
Axle/Gears: stock axle with 4.11's

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Re: Tremec TKO 500 speedo question

i just ordered a tko 600 from fortes...im running 4.11s he said it will be coming with the right gears arldy set up no matter the tire size...on a side note did you guys have to shorten your drive shafts?
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Old 06-26-2008, 03:59 PM   #7
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Join Date: Jan 2003
Location: Worcester, MA
Posts: 1,782
Car: 1987 Camaro Z28
Engine: 335 TPI Stroker
Transmission: Tremec TKO 500
Axle/Gears: 10 bolt / 3.42

Classifieds Rating: (0)
Send a message via AIM to TunedPort 335
Re: Tremec TKO 500 speedo question

Nope, my driveshaft is a stock aluminum one out of an LS1 car
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1987 Camaro Z28- 335ci TPI stroker, Tremec TKO 500 trans, 3.42 10 bolt
1994 Corvette - 355ci LT1, LT4 Hot Cam, Bolt ons, Z07 suspension (1 of 887 that year)
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Old 06-29-2008, 08:21 AM   #8
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Re: Tremec TKO 500 speedo question

Hey TunedPort. You'll need to get another gear for the adapter too. The TKO speedo adapter uses the Ford style gears. That T5 gear you have won't work at all. Fortes carries the correct, Ford gear in the 19 tooth version. Or if you want to save a few bucks, you can get them on ebay a bit cheaper than Fortes. I bought an 18 and 19 tooth gear for mine off ebay for about $20 shipped for both. Make sure they're for the manual trans application. The Ford automatic speedo gears look pretty similar, but they're a bit different. Btw, the 19 tooth gear is pink in color, 18 tooth is yellow, 20 is black, 21 is red, etc.
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Old 06-29-2008, 08:21 AM
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