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  1. 496GasJob

    Allison TCM tuning

    The guy was able to fix my throttle issue. ended up being a throttle "tip in" adjustment. basically maxed it right out and now it acts like a normal dbw setup. half second lag but no longer "eases" into the throttle when you punch it. i'm happy with the way it drives other than the fact it seems...
  2. 496GasJob

    Allison TCM tuning

    so I got my tune today. initial run on the dyno was 230hp and 267ft lbs. after tune was 255hp and 314 ft lbs. I expected a lot more and think my numbers should be higher overall. anyone think these numbers are low? also my throttle response is horrible even though it showed up in the PID's as...
  3. 496GasJob

    Allison TCM tuning

    well I set an appointment for the 30th to have it dyno tuned. i'll update with some results. hopefully it wakes her right up.
  4. 496GasJob

    Allison TCM tuning

    yeah well from what I hear, the gears are much more evenly spread out in the zf6 compared to the nv4500. I am actually picking up an nv4500 this weekend to put behind the 8.1 going in my 96 1/2 ton. maybe i'll change my mind about the zf6 once I take the 96 for a few good drives
  5. 496GasJob

    Allison TCM tuning

    Well I swapped out my MAF sensor with one I had kicking around and it runs exactly the same but generated the same code it did over a month ago, "mass air flow circuit/range performance", so I know this sensor is bad, i'll try a different one tonight. And as far as I know, marine engines are...
  6. 496GasJob

    Allison TCM tuning

    only code the truck has generated in the last 5 months was a Mass air flow code. can't remember the details but I cleaned the MAF and it hasn't come back now for over a month... but I do part out these trucks so I have like 4 or 5 of them just kicking around. I think i'll swap one into my truck...
  7. 496GasJob

    Allison TCM tuning

    I bought the truck 5 months ago with 84k miles. I just assume it's healthy but it did tow a 15k camper its entire life. I will probably check the compression soon and, THEFERMANATOR thanks, I did forget the Allison has no bands.. I didn't realize it can't skip gears like the good ol 4l80's...
  8. 496GasJob

    Allison TCM tuning

    ok, so I recently bought a 2002 2500hd with an 8.1/ally combo. this truck really did not impress me from the get-go. my last truck was a 2wd reg cab 2500hd 6.0 and was significantly faster than the 8.1. don't get me wrong, the 8.1 tows my trailer pretty good and I can still get 10.5 mpg pulling...
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