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| Ours we run 30 in trans and finals because it leaks oil trans into finals .Since I don’t use it a lot I’ll remove oil from final and replace to the trans.Hy guard in hyd system here .Also torque converters or notorious for running hot on those machines we even added an external transmission cooler seemed to help some and tried synthetic 30 weight. We’re in Central Texas. It gets pretty hot here.
Edited by super2 2/7/2026 17:20
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What oil in on old Cat D6C Dozer?
