Leaking oil everywhere... possible rear main seal..
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Supreme Member
Joined: Jul 2006
Posts: 1,674
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From: Windsor Ontario
Car: 1987 Firebird Formula
Engine: 2004 LQ4
Transmission: T-5 WC
Axle/Gears: 3.42
Leaking oil everywhere... possible rear main seal..
I know it's a nightmare, but I'm just wondering, how many have changed their rear main seals while the engine is still in the car... Because of this, I may wait until winter and just pull the engine ( It needs some major head work). Was this a common problem on the third gens?
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Joined: Jul 2009
Posts: 236
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From: New holland, PA
Car: 1986 Camaro
Engine: 436" SBC
Transmission: TH350, 8" Converter
Axle/Gears: S60 with 4:11 and Locker
Re: Leaking oil everywhere... possible rear main seal..
all 2 piece rear main seals occansionally had this problem. i've fixed them before in the car. but if your engine needs more help than that then i would wait and pull it.
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Joined: Sep 2008
Posts: 238
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From: Anchorage, Ak
Car: 1988 Pontiac Firebird
Engine: 5.0 TBI
Transmission: W/C T5
Axle/Gears: 3.08 Posi
Re: Leaking oil everywhere... possible rear main seal..
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Joined: Jul 2007
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From: MA
Car: '87 IROC/'68 SS
Engine: 5.7L/350
Transmission: 700R4/Muncie 4-spd
Axle/Gears: 3.27 9 bolt / 3.31 12 bolt
Re: Leaking oil everywhere... possible rear main seal..
Did you pull the torque converter cover and make sure it's the RMS that's leaking? It's much more common for the intake, valve colver, or oil pan to leak and run down.
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Joined: Feb 2009
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Re: Leaking oil everywhere... possible rear main seal..
JV9999 is right. I just got done pulling the tranny out of my '91 about 15 minutes ago only to realize that the oil pan gasket was leaking. I'M PISSED right now.
Make sure you know where it's leaking from before you pull the transmission.
Make sure you know where it's leaking from before you pull the transmission.
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From: Northern California, Redding
Car: Red 1987 IROC Convertible
Engine: 305 LB9 TPI
Transmission: T5 5-Speed
Axle/Gears: 9-Bolt 3.45
Senior Member
iTrader: (1)
Joined: Jul 2007
Posts: 1,141
Likes: 2
From: MA
Car: '87 IROC/'68 SS
Engine: 5.7L/350
Transmission: 700R4/Muncie 4-spd
Axle/Gears: 3.27 9 bolt / 3.31 12 bolt
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Joined: Apr 2001
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From: Woodbury ,mn
Car: 1989 Gta
Engine: 383
Transmission: T56
Axle/Gears: 3.27
Re: Leaking oil everywhere... possible rear main seal..
i agree with jv9999 rms is that last thing i would check, valve covers have always been the pain in my a$$ do a little cleaning then go for a drive check for new leak. It will save you the trouble of having to put your tranny back in when thats not the issue.
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Joined: Sep 2009
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Car: 92 dodge minivan
Engine: 350 chev
Transmission: 350 turbo
Re: Leaking oil everywhere... possible rear main seal..
Hi,
I'm just looking in here and i have a similar situation, i would like to ask some advice about the RMS (i am thinking this old it is a two piece seal) on a 350 Chev that's still in the vehicle. This is a 1978 and it is a van. i have done some nightmarish repairs in my past and i guess i'll do another, do i need to disconnect the motor mounts and the tranny mounts, lift the motor up and pull the pan?
Paul
I'm just looking in here and i have a similar situation, i would like to ask some advice about the RMS (i am thinking this old it is a two piece seal) on a 350 Chev that's still in the vehicle. This is a 1978 and it is a van. i have done some nightmarish repairs in my past and i guess i'll do another, do i need to disconnect the motor mounts and the tranny mounts, lift the motor up and pull the pan?
Paul
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