Hi Everyone - My '93 940T Wagon ( or should I write 945T? ) has a driveline or something making a droning noise and can't figure out what to do first or next to help her out. I've had the shocks and struts and other suspension parts replaced about 7 years ago. This includes engine mounts and transmission mount but not the center mount bearing. I've had the transmission rebuilt 6 years ago which still has issues even after taking it back three times before warranty expired, I've only put 21,000 miles on her in 6 years.
I've eliminated one transmission problem by installing a OD bypass part which made a huge difference.
I've done a transmission flush with Mobil 1 synthetic transmission fluid and will do it again when I have the time and money. This has helped with some of the slow speed down shifting where it feels like the transmission is bucking. I let off the throttle a little and then press the throttle again and most of the time it finds the gear it's suppose be in. It's totally random!
I've tightened the kick down cable three flats and it's helped with the bucking and shifting. It's hard for me to know how tight or loose it should be because there's no little crimped on stop thing.

Anyway, back to the driveline.... I was wondering if some of the driveline vibration is because at four corner of my car are at different heights. Driver side front measured from center of wheel to bottom of wheel panel 15.25", Front passenger measures 16", Rear driver is 14.5", and Rear passenger is 15.25".

I first tried lowering the center carrier because after shaking it it looked like it was too low. Which seemed to help at slower speeds but at faster speeds I felt and heard a little more vibration.
I raised it back to it's original height but played with the center carrier alignment and that seemed to help a lot.

I still get some droning and knocking especially when speeding up and slowing down and am wondering if some of the droning is because of the different heights of the car? Should I install a new transmission mount? Play with the driveline alignment some more?

Sorry for the long rambling post... just have so many questions and issues to address.

Best Regards,

Bill