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Praxiss454 · 05-26-2018, 06:52 PM

Okay, so I had to jack the engine to drop the pan. No biggie. Two of the bolts were broken off by a PO so I extracted those, feeling pretty good.

But I can't get the damn upper rear main seal out of the channel no matter what I try. The lower seal was RTV'ed into the channel, so I expect the same from the upper. I think this means I will need to drop the shaft. The seal is the neoprene style with the metal rod through it, and I was trying to tap it out with a hammer but kept slipping, and put a tiny knick into the shaft so decided I better quit while I'm ahead. Gently filed down the high spots from the knick.

Can anyone point me to a write-up of how to drop the shaft, or explain it? I have the GMC Maintenance Manual for my truck but so far can't find a section on this.

05-26-2018, 06:52 PM	#35
Praxiss454 Registered User Join Date: Jun 2016 Location: Novato, CA Posts: 519	Re: Leaking near flywheel Okay, so I had to jack the engine to drop the pan. No biggie. Two of the bolts were broken off by a PO so I extracted those, feeling pretty good. But I can't get the damn upper rear main seal out of the channel no matter what I try. The lower seal was RTV'ed into the channel, so I expect the same from the upper. I think this means I will need to drop the shaft. The seal is the neoprene style with the metal rod through it, and I was trying to tap it out with a hammer but kept slipping, and put a tiny knick into the shaft so decided I better quit while I'm ahead. Gently filed down the high spots from the knick. Can anyone point me to a write-up of how to drop the shaft, or explain it? I have the GMC Maintenance Manual for my truck but so far can't find a section on this. __________________ 1965 GMC 1000 SWB Fleetside L6 230 - SOLD Thanks everyone for the help over the years.