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GulfMack

Puppy Poster
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Everything posted by GulfMack

  1. I’m relatively new to macks, I bought a 2001 rd688 with the em7 300/Allison ht740. I was wanting to swap that’s trans out for a 4560 to be able to run interstate speeds and not be turning 2100rpm the whole way. I’ve called a couple shops and they act like it isn’t something easily done?
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