When I bought it a week ago the dealer said they had changed all the filters but you never know I guess. Thanks a lot for your help. I'll see if I can try someone else's programmer for a bit.

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What's a spin?

Just look under the truck. If the filter looks really clean then id say they did change it.. i wondet if there is a fuse for the transmission that you could pull out and un hook batteries to reset the trans learning. Like i said maybe its just adapted to your old driving and power?

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Spin on transmission filter. Looks like a oil filter.

Ok yea that actually makes sense. Thanks ill check it out soon

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It's shifting a lot better now already.

What did u do?

I tried to update it but it didn't let me update it. So I put it back on my truck and now it seems to have gotten so much better

Good!!!!!

the allison is an adaptive transmission, if you take power levels from stock to 450hp the transmission is not used to that much torque, you need to reset the TAPS to help the transmission quickly re-learn how to deal with the added power, that or you can drive easy for a while until it learns on its own

Im not sure if the Diablosport can reset the TAPs, so it may take a while for the trans to adapt:tu:

No I can't reset taps with the diablosport. So your saying I should have it on the highest level for a while and just take it easy so it can learn it? How long do you think it would take?

Put it on whatever level you are planning to use on a regular basis, then you can let it learn slowly, just drive "normally" for a few weeks before you really beat on it, you can do a few hard accelerations in both normal mode and tow/haul and that might help it to adapt quicker

the standard procedure after you re-set the taps into "quick learn" mode is to do several 0-60 accelerations doing it at 1/4 throttle, 1/2, 3/4 and full throttle, and repeat the steps in tow/haul

You could try that without the re-set, it might help :tu:

Ok right on. Thanks for your help. I just ordered a transgo shift kit too so hopefully it's better soon