rear main seal leak

[almirante]

does any one have a real non leak (none) rear main seal, does the vicosity of the oil play any roll on it

Thanks.

 

[renovate7]

When I got my truck recently I thought I had a rear main leaking. Turned out to be the hose between the turbo return line and the big nipple in the block. Then I thought I still had a rear main leaking but it's the valve cover going down the passenger side. You can't see the source, with all the stuff on that side of the engine, unless you really look. If the rear main is leaking I think (but am not sure) the oil will come out of the drain hole on the bottom of the clutch cover. If you see oil forward or above of that start checking other things.

 

[devilman96]

Rear mains are very common to fail on trucks from storage... I have a newer style lip material that is better than the older Viton used in the stock seals if your looking to change it...

http://www.odiron.com/store/product_info.php?cPath=4_54&products_id=538

You can also find them at Napa, the PN is in the part cross section...

 

[WillWagner]

OR...not wanting to step on d-mans toes..if it has been sitting a long time, run it and see what happens first before you go to all the work of taking the trans out...sometimes things seal up after they get used a bit.
Sorry Mike , just stating what i'd do before tearing into it!
Oh yeah, leaks run downhill. Check upsteram also.
almirante, Where in ca. are you?

 

[devilman96]

No toes stepped on at all brother.
The exchange of ideas and information is what we are all here for!!!

 

[Jakob]

I'm currently chasing a possible leaking rear main seal. I'm exploring ALL other options first though because it doesn't leak oil all the time, only after it's driven for a while.

 

[almirante]

Thanks guys I all ready had the trany down, install a nitrile seal on, and ran the engine for half hour, and start leaking since that seal was a NOS like the lip was not tight to the shaft, so got the floruelastomer install it dry out all the area to determine source if any after half hour of running the engine since a very little amount of oil, but a total dry condition, so that why i ask if may be the oil is too thin that is ziping out, I allso going to try a new gasket that is made out high temp rubber about 1/16" thick, I will report back to base with result.
P.D: I am an industrial ingineer for food processing companies, and I always surronded by innoveted material, engineering so I like to experiment.
Thanks.......as you were folks