Originally Posted by willwren
Marty, was your torque converter replaced? Velocity of the TC is a big factor with age.
What are your trans temps when this happens?
Do you have more than 10 rpm'* of slip in TCC lockup?
There is no way your PCM will alow a shift that late unless there is a problem involving the torque converter. The PCM loses track of slip rpm'* at 255.
The torque converter or it'* controls are failing, or your PCM is trying to protect you for some other reason at the higher shifts (performance mode).
This wasn't a full rebuild if I recall.
The torque convertor was replaced with a new unit (according to rebuild reciept).
When I had it scanned last time I wasn't along for the ride, but when I asked they said the tranny temp was right where it should be.
I had seen 230* when I scanned at Gordy'* but later realized that I had cardboard between the radiator and tranny cooler preventing the tranny cooler from cooling anywhere near it'* full capabilities. Tranny shop pulled the cardboard out when they fixed the line that had popped off and said they saw tranny temps max out around 150-160'ish (exact * was posted here somewhere).
TCC slippage is a # I'm not recalling.
I think I'm going to drop the car off at the shop tomorrow before I head out to NE for a week -should be enough time to address the problem if it'* theirs.
Rebuild fairly extensive. Only thing I wonder about is the valve body, which shows as being replaced on the reciept, but on a test drive 2 months ago to figure out my mis-shifts (2-1, 3-2-1) the tech who rode with/test drove also, said he thought they had just flushed my original and re-used it, and if there was scratches from the metal shrapnel that passed through that could've been the cause for the mis-downshifts.