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Topic: 1981 rear end fluid change -

in Forum: C3 Driveline Components


1981 rear end fluid change -

Posted: 2/24/23 6:56pm Message 1 of 6
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NJ, NJ - USA
Joined: 2/13/2023
Posts: 58
Vette(s): 1996 c4 coupe black / black
2000 c5 coupe pewter / black

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 -

Posted: 2/24/23 7:48pm Message 2 of 6
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
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

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|



Joel Adams
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Re: 1981 rear end fluid change -

Posted: 2/24/23 8:17pm Message 3 of 6
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Overland Park, KS - USA
Joined: 7/9/2003
Posts: 914
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. 2023 Accelerate Yellow HTC Stingray

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.




1973 L-82 4 spd

Re: 1981 rear end fluid change -

Posted: 2/24/23 11:04pm Message 4 of 6
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Burke, VT - USA
Joined: 1/23/2002
Posts: 7283
Vette(s): SOLD - "The Toy" - '70 Convertible
SOLD - "The Beast" - '90 ZR-1 (#682)
SOLD - "Betty" - '28 Ford Model A Tudor
Sold - "BLKBRRD" - '78 Pontiac Trans Am
"BLUBYU" - '04 Coupe

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




Jim Olson 

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Re: 1981 rear end fluid change -

Posted: 2/25/23 5:30am Message 5 of 6
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Equinunk, PA - USA
Joined: 10/31/2007
Posts: 2466
Vette(s): 1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.

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




Re: 1981 rear end fluid change -

Posted: 2/25/23 5:31am Message 6 of 6
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Equinunk, PA - USA
Joined: 10/31/2007
Posts: 2466
Vette(s): 1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.

Whoops! My bad, the # is 20,000. 




in Forum: C3 Driveline Components


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