66 muncie 4 sp speedometer fitting "O" ring [Archive] - Chevelle Tech

: 66 muncie 4 sp speedometer fitting "O" ring


james a larson
Apr 15th, 10, 10:41 AM
Noticed a little oil leaking from the fitting for the speedometer cable on the transmission tail piece. The "O" ring is there; but must be the wrong size or worn.

According to the AIM this should be an "O" ring #3708146. My part CD lists 6264903 as the seal of all 62-75 transmissions ;but somewhere I found that this is for a TH350/400. So anyone know if this is also for the muncie transmission. Or know the inside and ouside diameter of the 3708146 or the 6264903? Thanks.