shudder/vibration in 3rd gear, but not 4th. 4r70w
Hello transmission people,
I have a 97 tbird, v8. I did the valvebody modification a year ( 20kmi) ago.
Now the transmission shudders in 3rd gear under a load when the torque converter is locked. It does not happen in 4th gear (OD).
Also, after accelerating in 3rd, and then letting the gas pedal off, the transmission shifts to 4th with a loud noise ( no grinding, the sound is of something hitting something else). It doesn't happen when the 3-4 shift is a power on shift. I hear/feel the same thing when the car coasts down from 3rd to 2nd gear. But it doesn't happen on a power on 3-2 shift. So basically,
I have an external cooler. The fluid is Mercon V. The fluid looks and smells normal ( for now). What could be wrong? Direct clutch? Or the torque converter? If you think it is the tc, shouldn't the transmission shudder in OD also?
Thanks for your help.
1.25" front and rear anti-sway bars
removed intake silencer