JasonK - 8/17/2014 10:06 I would follow the operators manual, unless there is a service bulletin to change to the other oil. There probably isn't much to worry about, but i'm a particular person and always follow what the books recommend. I would suspect that the 85W-140 is used for machines that travel down the road alot. Those finals are gonna heat up going road speed. Just running in the field it would probably be fine. I am also an advocate of following manufacturers recommendations. FWIW... on the old 9100 and 9200 CIH Fargo built tractors that ran gear lube in the axles 80w90 was recommended due to excessive heat build up if 85w140 was used. The heat buildup would occur at transport speeds. Keep in mind that a heavier viscosity fluid will not dissipate heat as readily as a lighter viscosity fluid.
Edited by Jim Naden 8/17/2014 16:01
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Differences in gear oil
