Quote:
Originally Posted by GuyThomas
I do not have the codes but 6-7 shift was a slip/bang while all others were smooth.
After a bit of stop and go traffic- the downshift to second gear while then getting back into slight acceleration with traffic made the transmission feel like it was going to drop out of the car.
I drive very cautiously and average over 20mpg. Always in 'D' mode. All else is great, burning 1 qt every 5k so everything seems normal and no lights on the dash at all.  |
This could be due to bad solenoids on the mechatronics unit.
If your transmission (GA8HP75Z) is anything like the 6HP ZF transmission then replacing the solenoids would be the first step i would do.
Dealers don't replace this, they just replace the whole transmission.