Engine/Transmission (1994 - 1998) NV 4500 going south

[AnonEd]

GM did own Allison. They sold it to a private equity group in 2007.

 

[flexyxj]

Well, I got a rebuilt transmission installed,added a temperature gauge and installed a pair of Fast coolers. When I was talking to different folks about why my transmission was howling 15,000 miles after a bearing kit and I had a guy tell me that it's because of the heat these NV 4500 build when towing heavy in 5th gear. I'm beginning to think there might be some truth to that statement. We drove 350 miles yesterday across SD at 70 MPH and the transmission temp was running about 180*. Today, on the return trip pulling our camper home the temp was about 210* - 215* at 65 MPH. I'm thinking that is too warm.....

 

[GAmes]

I'm beginning to think there might be some truth to that statement.

Not some truth, all truth.

 

[flexyxj]

Not some truth, all truth.

So.....is there a better solution?

 

[GAmes]

So.....is there a better solution?

Better for me was the G56 conversion. Driving slower didn't help. limiting boost to 20 psi didn't help. Towing in 4th wasn't an option I was willing to do.