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Tate

Puppy Poster
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Everything posted by Tate

  1. Where abouts would I find the switch? I’d need to have a Mack computer to check the setting ? When empty it’ll spin up to 2150 easily and in 1st through 5th gear when loaded. It’ll go about to 2000 rpm’s in 6th but I never shift that high. Just notice it when in 7th gear. It’s a 8 double L trany
  2. I have a 99 RD688S with a 400 E7 that I’ve done some work on. Have gone to a 400 series turbo ( none waste gate) stage 2 nozzles, polished manifold and k&n air filter. Truck pulls good bit in a hard pull in 7th gear it hits the wall at 1850 rpm’s. She won’t spin over that. Put new EUP’s and lift pump on still the same. My Mack dealer which is 2.5 hours away can’t help me out because I’m looking for the 460xt program. My local mechanic has the laptop and cable to hook up for remote tuning but his guy doesn’t do anything that old. Can anyone here help me out?
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