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Replacing Rear Main Seal

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Old 08-30-2005 | 02:48 PM
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dukemushroom1's Avatar
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Car: 1991 camaro rs
Engine: 383 stroker
Transmission: th350
Replacing Rear Main Seal

How difficult is it to do in the driveway? I would much rather spend $20 on the seal and do it my self than who knows how much a garage would charge. From what I understand I would have to unbolt the trans, torque conv., flywheel, and then I should be able to get to it from there, right?
Old 08-30-2005 | 03:28 PM
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five7kid's Avatar
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Pretty much.
Old 08-30-2005 | 06:25 PM
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From: greenville, OH
Car: 86 Firebird, 2002 Monte Carlo, 91 v
Engine: 350
Transmission: 700R4
we replaced the tranny on an 85 z-28 on the floor and it sucked. just about anything like that on the floor sucks donkey dong.
Old 08-30-2005 | 07:30 PM
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From: Carmel NY
Car: 85 IROC Ht
Engine: 383 carb
Transmission: T56
Axle/Gears: Moser 12 bolt 411
Is it a one or two peice seal . The one peice has to have the pan and rear main bearing cap removed to complet . Leaving your motor open to the elaments in the driveway . I have done the one peice in a 8 hour day but in a clean garage on stands .
Old 08-30-2005 | 07:41 PM
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dukemushroom1's Avatar
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Car: 1991 camaro rs
Engine: 383 stroker
Transmission: th350
It's a one piece seal...knew I shoulda replaced it when I was building the motor, the one thing I didn't use a new part on was the rear seal...worked fine for 2 years. Oh well, looks like I'll call the shop cause I really don't feel like dealing with the underside of this car right now.
Old 08-30-2005 | 09:20 PM
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Stevo's Avatar
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From: Northern, VA
Car: Pair of 92 Z28s
any chance u can post a pic of ur oil leak?

I wanna know if my main seal is gone...it drips about half a quart every 3k miles ive cleaned it...watched it run in the air cant trace exactly where its coming from...looks like top of tranny
Old 08-30-2005 | 09:29 PM
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From: Severn, MD.
Car: '88 T/A and '90 T/A
Engine: LB9/383
Transmission: T5/700R4
Originally posted by §teve
any chance u can post a pic of ur oil leak?

I wanna know if my main seal is gone...it drips about half a quart every 3k miles ive cleaned it...watched it run in the air cant trace exactly where its coming from...looks like top of tranny
Above the trany would be your intake gasket or valve cover.
Old 08-30-2005 | 09:39 PM
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From: Carmel NY
Car: 85 IROC Ht
Engine: 383 carb
Transmission: T56
Axle/Gears: Moser 12 bolt 411
Dont feel bad when I swapet my motor I only changed one motor mount on the toquec side . That was 7 years ago and it is allway's in the back of my mind. If you have some nice stand's and flat smooth drive way you can do it .Get the car up as high as you can(safely) and make an adapter plate to acomadate your floor jack . Come at it with the jack handel tords the rear and strap the tranny to it . One man job tough , two people a breeze .

Steve take a look at the distributor seal . That is if you have not look'et thier yet .
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