Delay to shift gears

A forum for discussing applications and implementations of the MegaShift transmission controller code for the GPIO from B&G. This can control up to 8-speeds and 6 shift solenoids (plus a 16x9 table for controlling a PWM line pressure valve). It has manual and fully automatic modes (16x9 load x speed table), with under and over rev-limit protection, and full data logging of all inputs and outputs (among many other abilities). A TransStim to test your completed board is also available.
Forum rules
Post Reply
shaodome
Posts: 58
Joined: Thu Aug 22, 2013 6:28 am

Delay to shift gears

Post by shaodome »

I'll post my MSQ in a few hours but for some reason I am expereiencing a weird extended delay before the ECU will shift to 4th. Looking at the gear shift table it is well within the bins that are 4th gear and the Hysteris clear is green in tuner studio (I'm assuming that means the engine is outside the limits of the shift factors set, thus allowing the shift) and it will just hang there taking a long time regardless of RPM. There is something else causing the delay I just don't know what it is.

I have the load smoothing factor set to 1000. Think that is the cause or other things to look at?
Top
Bernard Fife
Posts: 1696
Joined: Fri Apr 04, 2008 1:28 pm

Re: Delay to shift gears

Post by Bernard Fife »

shaodome,

There are all sorts of things that can block a shift, from hysteresis to rpm protection. It hard to say what's going on in your case without an MSQ and datalog.

Lance.
"Never wrestle with pigs. You both get dirty and the pig likes it." - George Bernard Shaw
Top
Post Reply

Return to “MegaShift Transmission Application”