Quote:
Originally Posted by SG4247
I put a 3.69 in my auto and had none of what you refer to.
Even on the stock tune, then on Ecutek.
So I am thinking it may be related to HP Tuners.
Wheel speed (mph) is determined by the wheel sensors.
Tire dia will alter the speedo but rear gears don’t.
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It behaves the same with all the same problems even with my stock tune, though I've heard HPTuners isn't very well received. I also had HPTuners tunes on my car before the diff swap without the issues described.
Could be placebo or remembering wrong but I also remember that for some reason my car changed when it shifts in auto mode from around 7250 to 7450~7500 when I turned my shitty hot air intake into a proper long tube CAI. No idea if that has anything to do with it (or how/why that would change the shift point when shift points are determined by the trans controller, not ECU.)
Also, edited my previous post. Speed readout issues were from my tire/wheel setup changing a month or two after the diff change, not the diff. I'm an idiot lol.