Another NV4500 failure.

[Mopar1973Man]

I've always been good about keeping fluids changed and checked. Yeah amount of power is part of longevity. Just like I asked Jason about that he stated the high power put more stress on the gears. He's got no problem with the 50 weight transmission fluid being is GL-4 and good for viscosity. Yeah the power does play a role. 

 

1. Broke the main shaft. (Edge Comp & +75 HP injectors)

2. Wore the hard facing out of 5th broke the gear.

3. Two sets of defective brass synchro. One set was 3nd gear and the other set was 4th gear.

4. Wore the hard facing out of the input gear and broke.

 

What I never had a problem with.

1. Never had a 5th gear nut issue

2. Never had a input shaft break.

3. Never had bearing failure.

4. Never had synchro failure (except the two defective sets less than 2k miles).

[Evan]

Yup a wet fluid changed every 20k or so will make them go long. Thf1000 would be my pick