A580 Issues

Working on a 6.1 L swapped charger R/T with an A580 transmission. Engine tune seems to be okay.

3.91 Gear
29" Tire
Cam
Heads
Intake
Exhaust
3800 Stall



First issue is that under wot acceleration in 1st and (no traction) the rpms overshoot and the transmission goes into limp mode
I have the max RPM in the trans set to 6400rpm and the limp mode trigger 1000rpms above. The engine revlimiter is at 6500 RPM

Secondly, in the Auto-Stick mode the transmission is shifting wayy too early. Like you pre-load second and nail it at 2500 rpm and it shifts at 4k rpm.
Could this be related to the 4200rpm limiter in the engine tune with MDS failed?

Tune is attached, thanks


Attachment 79533
Attachment 79534

You got a log of that early shift? Sounds more like the torque converter locking up, which will feel just like a shift.

I do not, the hard drive I had the log on died. I do remember I was logging "Trans Current Gear" at the time and it was definitely shifting.

Have a similar issue. Ever figure this out?

Quote:

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Originally Posted by MPGPerformance

Have a similar issue. Ever figure this out?

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Possibly a gear ratio issue?