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Topic: 1981 rear end fluid change -

in Forum: C3 Driveline Components


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1981 rear end fluid change - (1/6)
 2/24/23 9:56pm
Domer94
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NJ, NJ - USA

Vette(s):
1996 c4 coupe black / black
2000 c5 coupe pewter / black


Joined: 2/13/2023
Posts: 58

ive read a bunch of threads , but can i get a definitive on whether the rear in the 81 needs the GM friction additive? i know im shotgunning the forum with questions.. my eyes are hurting from reading threads.. but im just starting to dig into this new to me vette!  ordering up some service parts tonight

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Re: 1981 rear end fluid change - (2/6)
 2/24/23 10:48pm
Adams' AppleLifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas


Joined: 11/8/2003
Posts: 20151

Yes...it has a positraction diff, so you will need the additive.

 

 

(post #20,000!)



|UPDATED|2/24/2023 7:48:43 PM (AZT)|/UPDATED|


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Re: 1981 rear end fluid change - (3/6)
 2/24/23 11:17pm
73shark
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Overland Park, KS - USA

Vette(s):
1973 Orange Metallic Coupe (orig owner), L82, 4 spd (WR), PS, (A/C & PW (I installed from wrecked 73)), leather, AM/FM Stereo, ran with '65 FI unit earlier & will again some day.


Joined: 7/9/2003
Posts: 883

After you put the new additive in, it's a good idea to find a large, empty parking lot where you can drive in figure eights to work the additive into the clutches.



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Re: 1981 rear end fluid change - (4/6)
 2/25/23 2:04am
NorskyLifetime Member
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Burke, VT - USA

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SOLD - "The Toy" - '70 Convertible
SOLD - "The Beast" - '90 ZR-1 (#682)
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Joined: 1/23/2002
Posts: 7218

I was told by a wise ol' sage to do a few figure 8s in reverse also.



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Re: 1981 rear end fluid change - (5/6)
 2/25/23 8:30am
manchestersharkLifetime Member
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Equinunk, PA - USA

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1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.


Joined: 10/31/2007
Posts: 2408

Whoa Babalouie! Is that the 10,000th time you posted that answer, or YOUR 10,000th reply to Any inquiry? 



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Re: 1981 rear end fluid change - (6/6)
 2/25/23 8:31am
manchestersharkLifetime Member
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Equinunk, PA - USA

Vette(s):
1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.


Joined: 10/31/2007
Posts: 2408

Whoops! My bad, the # is 20,000. 



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