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Current weight is 10,500 lbs., with dual G177's. I am assuming an increase of around 1,500 lbs with the conversion. So say 12,500 safely. Tire size in the 46" range, looking at 395's on aluminum mrap wheels. Cruising rpms at 2200, max rpms at 3,000. I do occasionally pull a 10,000 lb trailer...

Yes, I found some 5.65 mrap axles. Finalizing the deal now. He's willing to bring them for less than I can go get them for. I am waffling on getting the t600 mrap t case. My cummins has that big sae 2 or 3 housing mated to a non overdrive eaton fuller 5 spd. Even with 16.00's ,I can't get the...

I am needing the overdrive. I have even considered just using the mrap t case, and finding an overdrive transmission. I have a low mileage spicer 3053A takeout from a deuce that I thought about using.

My first gear is in the 8.5:1 range. I don't forsee using low range except in a low speed, easy throttling crawl. My target engine output is 450 hp / 750 torque. I have heard that the t1138 doesn't like input speeds above 2100rpm, that is probably my single biggest concern. If true, will...

Does anyone know the specs on this case ? I am thinking about using it behind a 5.9 12 valve cummins in a ford F700 running mrap axles. My questions center around: Max input speed? " " horsepower? " " torque? Thanks