Can someone provide me with a size for the HEX bolt for the drain and fill plugs on the NV3500 Manual transmission. My local O'Reilli does not stock a hex driver as large as is required.
Also, can anyone confirm the Mopar gear-oil recommended is merely 75-W90(non-synthetic). I am putting in a synthetic 75-W90 which I am assuming will exceed specifications for this tranny.
This unit has 240,000 Miles on it and has provided exceptional service. It still shifts great, but runs hot and feels loose when shifting or engaging the cluch. Not sure the last time gear-oil was replaced. I think it was when transfer-case, u-joints were replaced at about 200K, but about 3-years ago. The truck has also started sucking gas since I noticed the tranny issue.
All suggestions appreciated!!