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Dean 11-07-2009 16:26:28 67.172.13.37 456386 Report to Moderator	Is hydrayulic oil finding its way into the transmission and/or differential? How severe is/are the leak(s)? Failed seals between the hydraulic sump and the transmission and/or differential can allow oils to migrate. If a severe leak developes from the hydraulic sump to the transmission, it can be caused to corroded hydraulic lines within the transmission. Relatedly, CNH now recommends the use of CNH 134D in all 3 sumps. This, of course, eliminates any oil migration problems. I use 134D in all sumps (except engines, of course) of all 3 of my 55s/early 60s Fords as well as my 2 8Ns with excellent results. Dean [Reply]   [No Email]
RBnSC 11-08-2009 06:14:36 69.73.87.43 456421 Report to Moderator	Re: 1957 850 leaking fluids internally in reply to Dean, 11-07-2009 16:26:28   Dean are you saying that if I run 134d I won't have to worry about the leaking tubes and seals in my 5 speed unless it is the pressure side? Serious question not being a smart alleck. Ron   [Reply]   [Send Email]
Anthony 11-08-2009 08:18:29 173.3.130.112 456435 Report to Moderator	Re: 1957 850 leaking fluids internally in reply to RBnSC, 11-08-2009 06:14:36   With all fluids the same there won't be any cross contamination mixing of different types. But if seals are leaking the lower viscosity 134 oil will leak even more than 90w gear oil. Also I believe the fluids are at different levels in each compartment. I've seen it where the trans level drops and the hydraulic becomes over-full to the top of the dipstick. I had a tractor do this for many years/hours and never suffered any bad consequences. I use 90W in the trans and differential.   [Reply]   [Send Email]