Adam F
New Member
Trying to narrow down some issues with an 11 SHO I picked up.
2 main issues.
First, is a binding of the tires when turning. Like I was in my 4wd truck with 4wd engaged and trying to turn on dry pavement. Also, sometimes I fell a slight drag when going straight. Also, when stabbing the throttle while already moving, the car feels like its crab walking a bit to the side, like something is wrong in the rear suspension. Could this be a locked up RDU clutch pack? I unplugged the electrical connector to the RDU and it did not change anything, still binding. With all 4 wheels off the ground, engine off, car in neutral, I can spin the fronts and the rears turn and spin the rears and the fronts turn. Do I have a problem with the differential in the transaxle, or RDU? Can I safely remove the rear drive shaft and drive around to see if the problem is still there?
Second, I have a horrible shuddering on partial acceleration, mainly 30-40mph. Shakes the motor back and forth badly (I also have worn out motor mounts and lower control arm bushings which makes it worse) Research tells me its a common problem with the torque converter? Does this sound like the issue? Shifts gears great, no slip. Also, RPM's flutter a tiny bit. Fluid was dirty looking, so I drained and filled 1.5 gallons. Still shudders. I'm going to add some lubegard shudder fixx and see if that helps.
I inspected the PTU/fluid. Exterior looks perfectly fine. No leaks. I drained the dirty black fluid with some fresh fluid. Didn't help the situation. Although I don't think it could cause the binding that I'm seeing since its just a straight gear set with no clutches.
2 main issues.
First, is a binding of the tires when turning. Like I was in my 4wd truck with 4wd engaged and trying to turn on dry pavement. Also, sometimes I fell a slight drag when going straight. Also, when stabbing the throttle while already moving, the car feels like its crab walking a bit to the side, like something is wrong in the rear suspension. Could this be a locked up RDU clutch pack? I unplugged the electrical connector to the RDU and it did not change anything, still binding. With all 4 wheels off the ground, engine off, car in neutral, I can spin the fronts and the rears turn and spin the rears and the fronts turn. Do I have a problem with the differential in the transaxle, or RDU? Can I safely remove the rear drive shaft and drive around to see if the problem is still there?
Second, I have a horrible shuddering on partial acceleration, mainly 30-40mph. Shakes the motor back and forth badly (I also have worn out motor mounts and lower control arm bushings which makes it worse) Research tells me its a common problem with the torque converter? Does this sound like the issue? Shifts gears great, no slip. Also, RPM's flutter a tiny bit. Fluid was dirty looking, so I drained and filled 1.5 gallons. Still shudders. I'm going to add some lubegard shudder fixx and see if that helps.
I inspected the PTU/fluid. Exterior looks perfectly fine. No leaks. I drained the dirty black fluid with some fresh fluid. Didn't help the situation. Although I don't think it could cause the binding that I'm seeing since its just a straight gear set with no clutches.
Was involved in a front end collision and poorly repaired. I got it from a police impound so no history. I replaced the core support, radiator, condenser, and intercooler. I'll try to get someone to run it on the lift and see if I can find anything.
