Thread: Tranny Fluid for Dodge 5-sp manual?

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Originally Posted by R Pope

I learned the hard way, do NOT put gear oil in it! The passages that carry oil to the bearings are too small to flow that stuff. The bearings will fail in a week! The 4500 uses the thick stuff, though. Your trans only holds a few bottles, I'd go for the right stuff. Cheaper than another trans!

Pope, do you recommend just draining the transmission and refilling when I am ready? or is some sort of flushing in order?

In reading, I see where others recommend AMSOIL, Royal Purple, or Pennzoil manual tranny syncromesh (MTS). Apparently Motors published a lubricant crossreference guide and the AMSOIL MTS is an approved substitute for the NV3500.