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Do I have a 1 peice or 2 peice rear main seal?

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Old 08-11-2006, 09:48 PM   #1
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Join Date: Feb 2000
Location: Winston salem, NC
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Car: 1987 1SICIROC.....1999 TransAm
Engine: 385 HSR.....LS1
Transmission: 700R4 with Midwest 3400 2.4str...M6
Axle/Gears: SLP Zexel Posi unit 3.42's...3.73's


Do I have a 1 peice or 2 peice rear main seal?

Its an early style block..3970010 block..is that a 1 piece or 2 peice rear main? Its for my 383 and Im looking for a flexplate for it and want to get the right one...I know I need a 153 tooth plate..my motor is internally balanced and I already have the 7 1/4 fluiddampr on the front...

When I ask the parts people for a flexplate they ask me if I have 1 or 2 rear main seal....I have not clue.

Im thinking I got a 2 piece?


help!...LOL

thanks!
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Old 08-11-2006, 09:55 PM   #2
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Its a 1 piece rear main seal block. 69-80. They dident change to a 2 piece till 86.
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Old 08-11-2006, 10:22 PM   #3
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010 is a 2-piece block.

The 1-piece was introduced in 86.

The other guy got the years right, but the seal designs backwards.

So you're right, you need a flex plate for a 2-pc style block.
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Old 08-11-2006, 10:55 PM   #4
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Join Date: Feb 2000
Location: Winston salem, NC
Posts: 2,850
Car: 1987 1SICIROC.....1999 TransAm
Engine: 385 HSR.....LS1
Transmission: 700R4 with Midwest 3400 2.4str...M6
Axle/Gears: SLP Zexel Posi unit 3.42's...3.73's


ah, OK..I'll take your word for it...so****indumb..LOL!!!!whoops I mean sofakingdom!!!

Should I just get a stock one..or would I benefit from a lighter one if they even make one...

thanks guys!!!
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Old 08-11-2006, 11:00 PM   #5
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The stock one is about as light as they get; a little TOO light for a performance buid IMHO; you'd probably benefit from a little better one.
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Old 08-11-2006, 11:03 PM   #6
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Just to put in my 2cents, it is a 2 piece I'm rebuilding a 95 block and I just removed the rear main 1 piece seal. although I had heard it was 88 and up not 86, good luck with your choice. Oh and by the way, you may need to find a better parts supplier if they can't determine whether or not you have a 1 or 2 piece seal. It's not that hard to figure out.
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010, 1988, 3400, 3970010, agxa1, block, camaro, engine, main, motor, pc, peice, piece, rear, seal, th350, transmission

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