Rear Main Help
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Junior User
Joined: Feb 2007
Posts: 65
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Rear Main Help
I am helping my neighbor rebuild the engine in his 78 F-350 flat bed. Everything has gone fine, starts and runs, except it is puking oil from the rear main. Already dropped the pan and put another seal in. If anything it seems worse now. Anybody got some good tips or tricks to replace a two piece rear main and get it to hold? Also what is the difference between the rubber and rope style seals? Any help would be great as this is all that is stopping this truck from being on the road.
Logistics Pro
Joined: Jan 2002
Posts: 4,907
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From: suburban atlanta
Rope does not sux. You just don't know how to perform a difficult task, or have no patience. They worked for years, and you can do them w/o pulling the trans & flywheel/flex-plate.
Betcha don't like that. Heh. tom
Betcha don't like that. Heh. tom
Posting Guru
Joined: Sep 2005
Posts: 2,238
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From: Kiefer, Northeastern Okla
The '60's and '70's smallblock rear main bearing cap has a pin that held the factory rope seal. Unless you are going to use a rope seal, remove this pin by driving it out with a center punch. If you leave this pin in, it will distort the replacement steel and rubber rear main seal, causing a leak.
Pete
Pete
