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I have a chevy 2.8l v6 with a rear main oil seal leak. I will be dropping the tranny tomorrow. Is there a way to tell if it has a 1 piece or 2 piece rear main oil seal just by looking at it after removing the flywheel?

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Try buying it that should help unless there are two types

Posted on Sep 04, 2010

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How much to fix rear main seal


The straight 6 is a 2 piece rear main.
Pulling the oil pan is in order.
But the V-8 is one piece,the tranny has to be removed.

Jan 31, 2013 | 2000 Jeep Grand Cherokee

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Oil leaking from toyota camry 1992, 1994 model


You don't say what engine it has. The 4-cyl was a better than the V6 for oil leaks.

The V6 had oil leaks from

-rear bank cam cover gasket

-distributor o-ring seal

-oil filter bracket o-ring seal

-crankshaft nose oil seal (less common)

-rear main bearing oil seal (expensive, just leave it)

The 4 cyl leaked oil from

-distributor o-ring seal

-camshaft cover gasket

-rear main bearing seal (expensive, leave it)

May 21, 2012 | 1991 Toyota Camry

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I have a 1983 buick regal limited that is leaking oil from what I believe is the rear main seal. Tomorrow I am going to scoot the transmission back and check to see if there is oil around the flywheel . My...


GM never uses exhaust manifold gaskets, it is a machined fit. The rear main may be two piece in this year, it depends on what engine the car has, you never say, if so you must remove the oil pan. Also if it is a one piece you need the installation tool to install the seal, if you don't do it right it will likely leak even worse.

Feb 14, 2012 | 1983 Buick Regal

1 Answer

I have an 83 silverado short bed and im about to pull the tranny out to get it rebuilt and the rear main seal may be leaking as i put oil in and it leaks out pretty fast. my tranny is covered in oil and so...


I'm fairly certain that your engine does not have a full circle external main seal (if when you remove the trans and flywheel you find the rear crank flange is bolted to the crank and not part of the crank, then I'm wrong) If it's not an external seal, it is two piece, located in the rear of the main bearing cap. That makes it necessary to remove the engine oil pan and the rear bearing. Before contemplating doing anything with that, make very sure that the leak is not from the intake or valve covers first. Otherwise you'd be doing ton of work for no reason. Wipe everything down and look carefully. If it's leaking fast it shouldn't be difficult to see.

Mar 14, 2011 | 1983 Chevrolet Silverado

1 Answer

Is the rear main seal on a 1999 gmc yukon a 1 piece or 2 piece seal. Leaking oil real bad from back of motor.


its a one piece. should be the metal one with the rubber inside seal. of corse you gatta pull the tranny but its a good time to change fluids and maybe slap a new torque converter in. changing the rear main is pretty easy after the tranny is out.

Feb 09, 2010 | 1995 GMC Suburban

2 Answers

I need to replace the rear main seal on my 95 chevy pickup with a 350. do i need to drop the tranny?


Yes, either pull the trans or pull the engine. No way to get in there with out having one of the two out!
FYI it's very rare for a rear main on that engine to leak, Most all of the time it's the oil pan gasket or coming from higher up like a valve cover or the intake gaskets!

Oct 21, 2009 | 1995 Chevrolet K1500

1 Answer

My Chevy 2002 Tahoe is leaking oil. They told me


this truck is equipped with an aluminum oil pan you could have 1 or several things going on... a stripped drain plug which is causing it to leak or it may be a leaking front seal or a rear main seal. If it is a front seal it is not to labor intensive. But if it is a rear main seal leaking it will require the transmission to be removed since the seal is a 1 piece rear main

Sep 07, 2009 | 2002 Chevrolet Tahoe

3 Answers

1984 F150 302 Had oil pan gasket and both valve cover gaskets


you have several points to check!
the dip stick tube has a "O" ring seal at the bottom where it fits to tranny.
a reverse switch on tranny & the shifters selector shaft has a seal that may be leaking !
there are the cooler pipes from cooler to tranny [in & out] plus pump seal to the torque converter [leaks out between engine & tranny bellhousing] & then there are the drive shaft or shafts seals
so wipe it all clean & park it in a diffrent clean spot!
some will only leak when its runnung due to tranny,s internal pressure!

Jul 20, 2009 | 1984 Ford F 150

2 Answers

Oil leak out the rear main seal on a 2000 ford explorer


First, the easiest way IS to remove the transmission, it is a one piece seal, if it were a 2 piece, you would need to remove the oil pan and Rear Main Bearing Cap which in my opinion is alot tougher. When installing the new seal, make sure the the end of the crankshaft is clean of debris, lube the seal before sliding it over the end of the crankshaft to ease installation and some like to apply a thin coat of high temp sealant to the outside surface of the new seal to ensure no leakage. When reinstalling the flywheel/flex plate, proper torque is key because you dont want it working loose and having to remove the transmission again.

Mar 03, 2009 | 1999 Ford Explorer

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