My wife had to drive my 2011 Tahoe for a week when hers was in the shop. She complained of issues. When I drove it again, the transmission was sticking on shift and it had some serious rear end shudders and shakes.
I worked on the following:
-Dropped drive shaft and replaced universal joints
-drained tranny fluid and replaced filter
-replaced throttle position sensor
-cleaned MAF
-changed accelerator pedal sensor
-determined that driver side motor mount was bad and replaced
This helped somewhat.
Ordered a new yoke and GM grease and this seemed to help for a week or so (have done twice). I’ve also changed out a gallon of tranny fluid each time I’ve done this and added Shudder fix. Grease is spun out or washed out when I’ve regressed. Yoke sticking and shudder around 1500 rpm between 30-45 miles an hour seems to get better for a short while when I do this.
An additional problem is this: I hear a deep rumbling sound at low speed without braking or turning. It sounds like a torquing almost bass drumming sound and I think it is coming from the rear.
Questions: what is out of tolerance causing the driveshaft/yoke to slip/stick now? Can
the rumbling noise be from the rear differential (gears or bearings) which has also contributed to my issue with yoke stick and rear shudder? Fluid level back there is fine. There does seem to be some evidence of fluid getting past seals but level looks sufficient. How much could the torque converter be influencing these issues?
Also, I have replaced water pump, thermostat, belts, pulleys, alternator, heater hose connections, valve cover gaskets, and front sway bar bushings. I’m not sure how much damage was caused by the broken motor mount or simply by age (190,000) but a lot seemed to go fast.
Thanks for suggestions. If I knew a good local mechanic that wanted to tackle this, I’d take to them.
I’m thinking I’ll add something inside the yoke next time like a cut length of rubber hose. I’d sure like to correct other underlying issues and keep putting miles on this car.
I worked on the following:
-Dropped drive shaft and replaced universal joints
-drained tranny fluid and replaced filter
-replaced throttle position sensor
-cleaned MAF
-changed accelerator pedal sensor
-determined that driver side motor mount was bad and replaced
This helped somewhat.
Ordered a new yoke and GM grease and this seemed to help for a week or so (have done twice). I’ve also changed out a gallon of tranny fluid each time I’ve done this and added Shudder fix. Grease is spun out or washed out when I’ve regressed. Yoke sticking and shudder around 1500 rpm between 30-45 miles an hour seems to get better for a short while when I do this.
An additional problem is this: I hear a deep rumbling sound at low speed without braking or turning. It sounds like a torquing almost bass drumming sound and I think it is coming from the rear.
Questions: what is out of tolerance causing the driveshaft/yoke to slip/stick now? Can
the rumbling noise be from the rear differential (gears or bearings) which has also contributed to my issue with yoke stick and rear shudder? Fluid level back there is fine. There does seem to be some evidence of fluid getting past seals but level looks sufficient. How much could the torque converter be influencing these issues?
Also, I have replaced water pump, thermostat, belts, pulleys, alternator, heater hose connections, valve cover gaskets, and front sway bar bushings. I’m not sure how much damage was caused by the broken motor mount or simply by age (190,000) but a lot seemed to go fast.
Thanks for suggestions. If I knew a good local mechanic that wanted to tackle this, I’d take to them.
I’m thinking I’ll add something inside the yoke next time like a cut length of rubber hose. I’d sure like to correct other underlying issues and keep putting miles on this car.