I had to change the rear end in my daily and went from a 4.11 to 3.42 gear ratio. (Had a disk brake rear end and couldn't find a 4.11 in the junkyard) went to the gear tire calculator and nothing was there except for a multiplier. no gear ratio or tire size. Can someone help?
post up tune file if your asking for help of any kind
Are you viewing the software in advanced or standard mode?
I know this has been a few years but was anyone able to figure this out?
Last edited by DutchmanZ; 11-15-2023 at 03:08 PM.
Still hasn't been a tune file posted.
I will post one of mine tonight.Originally Posted by gtstorey
if its like my cruze the info for the speedo is all there but its not actually doing anything with hptuners as the actual data is in the bcm not the ecu so hpt wont do anything, alot of stuff just copy's over in the tune file but dosnt mean all of it works
Here is my factory unedited tune file. I was able to calculate my VSS Pulses per mile to 134.644 and the VSS Trans Revs per mile to 3366.1373. I set the drive sprocket ratio to 1:1 and the Trans Revolutions/Mile to the same as VSS Trans. My speedo it dead on but now my upshift light comes on in 5th gear?? I dont see anything that I can change to specifically fix the upshift light unless it was why the the 2 trans revs were different from the factory.
2000 Chevy S10 2.2 Manual 5 spd.hpt
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