HI I HAVE RECENTLY REBUILT 700R4 IN MY 86 TRANS AM. IT WORKS GREAT SHIFTS FINE BUT AS SOON AS IT SHIFTS INTO 4TH GEAR I HEAR A WHINING NOISE IT SEEMS TO GO AWAY AT FREEWAY SPEEDS OR AT LEAST YOU CANT HEAR IT . IT ALSO SEEMS TO BE A LOAD RELATED NOISE AS IF YOU LET OFF IT STOPS. ANY IDEAS WHAT IS GOING ON ????

 

They missed a bearing plate upon rebuild...take it back soon. They should have found this while measuring the stackups on the clutchpacks and endplays...

 

the bearings in a 700r4 have nothing to do with clutchpack stackup. they do however have to do with transmission endplay measured during assembly. it could be from not enough endplay. it could also be a torque converter or pump related issue.

 

I have a similar problem. Whines in both 3rd and 4th. Stops as soon as 2nd is engaged. Sound is related to trans speed not engine

 

Just dont shift into 4th gear...... lol or (like my old man would say) just turn up the radio..... hehe