Cummins swap, I know there is a search button but the info is burried in many threads

[randy500]

Originally Posted by Dieselwrencher

That's usually what gets replaced. You can use different offset wheels and still use the D80. My tires stick out a little, but that's how I wanted it. I surely didn't want the dog track look of an original K20 of this era.

I’m not going to be able to measure the rear end today but found in pirate 4x that it should be about 69.5 wide which would make it about the same width as the front, might be usable, 4.1gesrs puts 65 mph rpm at 1850 rpm or so, I guess that would be ok, not ideal tho

[Dieselwrencher]

Originally Posted by randy500

I’m not going to be able to measure the rear end today but found in pirate 4x that it should be about 69.5 wide which would make it about the same width as the front, might be usable, 4.1gesrs puts 65 mph rpm at 1850 rpm or so, I guess that would be ok, not ideal tho

You'd have to have 35s to get the RPMs down to 1850 at 65mph with 4.10s with a NV4500.

I saw in your thread that you have 33s. The NV4500 has an OD ratio of .73. So with 4.10s and 33s you're looking at 1981rpm@65mph. 2133@70, and 2286@75. Not horrible. Better than with 235s for sure. Haha

[randy500]

Originally Posted by Dieselwrencher

You'd have to have 35s to get the RPMs down to 1850 at 65mph with 4.10s with a NV4500.

I saw in your thread that you have 33s. The NV4500 has an OD ratio of .73. So with 4.10s and 33s you're looking at 1981rpm@65mph. 2133@70, and 2286@75. Not horrible. Better than with 235s for sure. Haha

Your right, the 1850 or so was running my dana 60 with the 3.73 gears...my bad..I do have 33 inch tires, 32.7 actually I think is what Goodrich says.