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

How to change differential fluid?

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Old Aug 3, 2005 | 08:51 AM
  #1  
firebirdjosh's Avatar
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From: Worcester, MA
Car: 86 T/A
Engine: HSR 355
Transmission: 700R4
Axle/Gears: 2.77 posi
How to change differential fluid?

Sorry for the stupid question, I just have never done it and would like to give it a shot while I change my tranny fluid as well. How hard is it to do?
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Old Aug 3, 2005 | 09:20 AM
  #2  
Difflock's Avatar
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From: Lancashire County, England, UK
Car: VIN=85 T/A, CAR=82/3 T/A gfx, go figure. She's a T/A anyway!
Engine: 5.0, Holley 600 cfm 4-barrel
Transmission: THM350 ??
There should be a filler plug on the side of the diff housing somewhere. OK make sure you've got a new gasket for the diff cover as well.
Unbolt the diff cover let it all come out. Fit new gasket, fill up the required amount via a tube into the filler plug hole et voila!

Mark.
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Old Aug 4, 2005 | 12:12 AM
  #3  
firebirdjosh's Avatar
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From: Worcester, MA
Car: 86 T/A
Engine: HSR 355
Transmission: 700R4
Axle/Gears: 2.77 posi
Wow great, sounds easy enough!
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Old Aug 4, 2005 | 12:19 AM
  #4  
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From: san francisco
Car: 86 TA
iv never done it on my ta but you probably only need to take out the plug and suck it out. then refill as much as possible
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Old Aug 4, 2005 | 12:31 AM
  #5  
Apeiron's Avatar
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
RTV works just as well as a new gasket, if not better.
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Old Aug 4, 2005 | 12:33 AM
  #6  
Rick King's Avatar
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Car: 1987 TA
Engine: 350 stock/twecked
Transmission: 700r4
do not do it this way, sorry man
iv never done it on my ta but you probably only need to take out the plug and suck it out. then refill as much as possible
If you refill as much as possible the pumpkin will be entirly submerged. Also if you take the cover off you can inspect the gears. The spec book will tell you how many quarts to use. I always use mobli synthetic for gear lub. I also do not use the gasket just orage sylicone, the gasket always leaks on me maybe I am not the best, but it always works.

later and

gb

rick
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Old Aug 4, 2005 | 12:43 AM
  #7  
Apeiron's Avatar
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Originally posted by Rick King
If you refill as much as possible the pumpkin will be entirly submerged.
It will be running out of the fill hole long before then.
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Old Aug 4, 2005 | 12:48 AM
  #8  
gimydaloot's Avatar
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From: san francisco
Car: 86 TA
thats how i was tought in school 8-). just ask the guys at napa or where ever u buy the gear oil
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Old Aug 4, 2005 | 12:52 AM
  #9  
Rick King's Avatar
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Car: 1987 TA
Engine: 350 stock/twecked
Transmission: 700r4
ok, but the fill hole on mine is on top, probly a different axel trhan what is supose to be under the car




you do it how ever you want


it is your car as for me I will open up the differental and inspect it also, that practice saved me from exploding a rearend before as I cracked a ring gear,

just my way

later
and

GB

rick
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Old Aug 4, 2005 | 01:00 AM
  #10  
Apeiron's Avatar
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
On the 10 bolt it's on the passenger side of the housing in front of the axle. On the 9 bolt and Dana 44 it's on the cover.
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Old Aug 4, 2005 | 10:10 AM
  #11  
firebirdjosh's Avatar
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From: Worcester, MA
Car: 86 T/A
Engine: HSR 355
Transmission: 700R4
Axle/Gears: 2.77 posi
Originally posted by gimydaloot
thats how i was tought in school 8-). just ask the guys at napa or where ever u buy the gear oil
No thanks if they are anything like the guys at my local Autozone.
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