Spitfire8 Posted December 29, 2014 Share Posted December 29, 2014 Hello all: I'm writing for a friend who has a '34-40 series, but no internet capabilities. In the process of doing some rear end work, it was noticed there is apparently no pinion oil seal installed or mentioned in the shop manual. Is this normal for a torque-tube equipped vehicle? Is the differential lubricant just allowed to creep up and down the inside of the torque tube? If one were to park nose-down on a steep hill, could this become a problem?Thanks in advance for any insights here. Bill. Link to comment Share on other sites More sharing options...
DonMicheletti Posted December 29, 2014 Share Posted December 29, 2014 The only seals of the torque tube rear end are at the axles. When things wear in the transmission, the oil from the transmission can run down into the differential. Rare, but it does happen. The oil wont go "uphill" into the transmission - at least I have never heard of that Link to comment Share on other sites More sharing options...
pont35cpe Posted December 30, 2014 Share Posted December 30, 2014 My `36 40 series with 233cu in engine, there is no pinion seal, and there is no seal on the crankshaft, front or rear, in the engine. The rear main cap has a check-ball in it to prevent oil from leaking out when the front of the engine is tilted up more than 18 degrees equivalent to a 28% grade. I think pinion seals started in 1937 in the hypoid type rear-end. Tom Link to comment Share on other sites More sharing options...
DonMicheletti Posted December 31, 2014 Share Posted December 31, 2014 No pinion seals in the '37's. Link to comment Share on other sites More sharing options...
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