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-   -   need help with shift points (https://www.performancetrucks.net/forums/tuning-diagnostics-electronics-wiring-161/need-help-shift-points-493200/)

getonit Dec 6, 2011 05:01 PM

need help with shift points
 
I changed my gears from 3.42 to a 4.10 with 295/50/16-27.7 tall tires. My rpms on 1/2 is 6350 and 2/3 is 6300 and 3/4 is 5800 in tow haul. In normal it is 6000 in 1/2 and 2/3 and 5800 at 3/4. I used a speed calculater that blackgmc posted on here but it still don't shift right. I adjusted the rpm and shift speed. Am I missing something. Its still shifting crazy. Im using hptuners.

getonit Dec 6, 2011 05:03 PM

I also went from a 3000 stall to a 4000. Do I make any adjustments for that or is it about the same?

Rhino79 Dec 6, 2011 05:09 PM

The looser the verter, the lower the mph will haveto be. Set the rpm where you want it. Then drop the wot mph by 1-2 mph at a time. Also make sure the part throttle table at 100% throttle match. Make sure wot and part throtle downshift tables are lower than the upshift.

getonit Dec 6, 2011 05:13 PM

Do I need to adjust the tps/rpm/speed tables??

Rhino79 Dec 6, 2011 06:02 PM

Yes. I don't have my pc w me, but in efilive there are tables for part throttle based off tps, and wot vs mph and wot vs rpm.

andrew383 Dec 6, 2011 06:15 PM

I would start with zeroing out the WOT mph and just set your RPM and relog to see what its shifting at mph wise,then adjust from there..


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