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81 auto trans pan replacement

Forum: C3 Engines, Driveline and Handling

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81 auto trans pan replacement

Posted: 2/24/23 4:34pmMessage 1 of 6
D
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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

i want to service the trans and put on one of those pans with the plug. i see two different shapes on CC covering the same years. its a turbo huydromatic,. would it be the pan thats basically square with the one corner angled?  its too friggin cold in the garage and i cant get low enough to see

533061.main.jpg

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Re: 81 auto trans pan replacement

Posted: 2/24/23 5:55pmMessage 2 of 6
m
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Equinunk, PA - USA
Joined: 10/31/2007
Posts: 2570
Vette(s): 1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.

That one is for a 350 THM. The other one is irregular in shape and is for the 400 THM. 

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Re: 81 auto trans pan replacement

Posted: 2/24/23 6:53pmMessage 3 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

ok , i just jacket up a corner... it looks like its the turbo350 in there. definitely not the irregular shape. should i be surprised?

 

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Re: 81 auto trans pan replacement

Posted: 2/24/23 7:59pmMessage 4 of 6
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 22714
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

'81 will be a 350C(lockup type). Same pan as "regular" 350. Word to the wise...if you plan on getting a chrome steel pan, be prepared to have leaks.....just sayin..

 

Joel Adams
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Re: 81 auto trans pan replacement

Posted: 2/25/23 5:36amMessage 5 of 6
m
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Equinunk, PA - USA
Joined: 10/31/2007
Posts: 2570
Vette(s): 1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.

Same goes for thermostat housing and water pump!  Shiny is pretty, but not good for keeping liquid where it belongs. 

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Re: 81 auto trans pan replacement

Posted: 2/25/23 7:19pmMessage 6 of 6
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Rock Hill, SC - USA
Joined: 8/2/2017
Posts: 59
Vette(s): 1977 White/Red

I replaced my stock TH 350 pan with a steel one. My original pan was distorted and destroyed by having the bolts over tightened to "fix" leaks. Bad idea.

The new one looks just like the pan shown above with the plug. It also leaked a bit at first, so I replaced the pan gasket with this one:

Moroso-93102-Perm-align-Transmission-Gasket

 

Problem solved.

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