Tuning 4.63 rear axle ratio 730 ecm with TPI

**EDZIP** · 03-22-2022

Have a 94 3500HD 2WD (15000 GVW) truck that I installed TPI in years ago. (350 TPI with NV4500 manual trans) Want to flash another prom...what changes should I make to a stock 350 TPI manual BIN to be more compatible with 4.63 rear gears?

Thanks

**dave w** · 03-22-2022

Maybe leveraging a .bin from this gearhead-efi link will help: http://www.gearhead-efi.com/Fuel-Inj...Information-8D

Something to consider is Deceleration Fuel Cut-Off (DFCO). A fluid filled torque converter will affect DFCO differently than the clutch of a manual transmission.

dave w

**EDZIP** · 03-23-2022

Thanks Dave

I have been using one of those bins for several years now without a problem...not sure which one one..but the truck has been great. Just replaced the injectors and installed an AFPR. I'll just grab another with the closest gear ratio.

Ed

**stew86MCSS396** · 03-25-2022

I*think*an accurate functioning speedometer is what matters. This may/may not have any relevance...
http://www.gearhead-efi.com/Fuel-Inj...ll=1#post48816

**EDZIP** · 03-25-2022

Originally Posted by stew86MCSS396

I*think*an accurate functioning speedometer is what matters. This may/may not have any relevance...
http://www.gearhead-efi.com/Fuel-Inj...ll=1#post48816

Took care of that mod years ago..Thanks

**stew86MCSS396** · 03-26-2022

Out of curiosity, NV4500 uses...40 tooth reluctor??? You running the speedo with a DRAC??? Just trying to figure out what it entails running similar setup but probably 4L60E w 40 tooth. thanx in advance!!!