transmition problem?

thanks again for your responses. :notworthy
nascar3 has the original requirements so they must be right. mil-l-2104c is basically military requirements for their oil. if you follow the spec to today its mil-prf-2104 or oe/hdo whatever weight or nato 0-237. oe/hdo means oil engine/heavy duty oil. i would say that means a 10wt engine oil. right? wrong? now thats not to say a transmition spec oil wouldn t be better. probly is as long as its the right weight.
that being said i guess i m draining the transmition. i would imagine i m still ok with the 32wt in the hyd system. thoughts? too thin?
if you still have that operators manual handy nascar3 could you post the diff lubricant requirement? and how do i get at the strainer john c mentioned?

i still feel like a greenhorn idiot :duh but you guys are all great educators. thanks again.

MIL-spec was one that manufacturers used say 20 years ago because it was a well-recognized "brand" if you will. The days it doesn't get used anywhere near so much, more manufacturers now refer to API specs (like your CD as it was 20 years ago) for engine oil. Today it's CJ-4. I don't know of any monograde engine oil as light as 10W, usually if they are that light in viscosity they are multigrades like 0W-20 or 5W-20 or something like that, but all those "oddball" engine oil grades (if you assume that 10W-30 & 15W-40 are the most common engine oils) are pretty hard to find and most manufacturers stay away from recommending them for that very reason. Also you have to remember that "back in the day" lot's of manufacturers were trying to select one oil that could be used in every system, and in most cases their recommendations came up with lubricants that were at best a compromise. These days engines use engine oil, power trains use power train oil, etc, etc.

My suggestion of using 10W TO-4 in the transmission was the fact that it has all the necessary modifiers/additives for transmission use, plus if it works correctly it would also be fine for your hydraulic system.

hi i will agree with nige on 10W TO-4 i will look for that oil for mine next oil change the straner is on lower side of trans there are 4 bolts holding a cover in place the cover has a hose held on with a clamp you must remove the diffs call for hy tran oil i think we can use TDH oil it is supposed to be for the wet brakes PS i got my books from doepkerindustrial in sask.

thanks again for all the help. books on order. oil will be changed as soon as the filter gets here and that will do it for now.