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I'm brand new to tuning with a laptop, used to jets and a timing light :cool:
I have a 99 K2500 with a 7.4 and 4L80E I recently bought.
For what little information can find on how to tune these,...

My 98 gmc with a 7.4 and stock ecm. having a problem when starting my truck it doesnt want to stay running, and when i take the truck out of gear it stalls. Cam,ported heads,ported intake, bigger TB

HP doesn't do trans gear changes for the older trucks

What's the best ECM to use in my 98 GMC with 7.4 & 4L80E, since my stock one wont support the 1st & 2nd gear ratio change i did in the trans:banghead:

ok, Thank you

Trans is throwing code P0730 Incorrect Gear Ratio. Cant find a place with my tuner to change the trans ratios

I have the same problem in my 98 gmc. i put a kilgore 2.75 1st gear planetary in it, It's throwing a P0730 code

I'm totally new to tuning, trying to figure out some basics. 1st question i have is my trans shifts super hard from 1st to 2nd, so hard i pucker lol i think it's going to break a u joint. The trans...

Same here

Hi, I'm Kevin from Kingman AZ, I've been in the parts business for 18+ years and building engines and trans's my whole life, drag raced everything from my pickup to my smallblock nitrous powered 68...