TDMKR496

iTrader: (3)

I recently got my 5.3/4L80E 411 PCM swap running in my 88 Mustang and I am tuning it with EFI Live. I rebuilt the trans and put a HD2 shift kit in it. I have put about 500 miles on it and have noticed it does not shift as hard as it did when I first got it running. Is this because the PCM is "learning" and do I need to work on the shifting tune of the transmission?

TDMKR496

iTrader: (3)

I have done some digging into this and found the the adaptive shift have been turned off. I also put a pressure gauge on it, in park it makes about 70 PSI and in in OD it makes 190-225 PSI.

Any suggestions??

Jake's Performance

iTrader: (2)

Your pressures are good, you need to look at what happens during the shifts on the gauge.

TDMKR496

iTrader: (3)

Ok, like if it drops or stays steady? Thank you for your help!!

Jake's Performance

iTrader: (2)

It should dip and recover on the shift. If it has pressure in 1st of say 200 psi, but it drops to 170 after the 1-2 shift, you have a leak on the intermediate circuit. If it holds the pressures throughout the range, you are good.

TDMKR496

iTrader: (3)

Thank you sir, I will post my findings tomorrow.