TF 904 Auto slipping 2nd to 3rd when manual shifting @ higher revs

Without the proper pressure the trans will not only slip on the shift but it will be slipping in gear. The result is excessive heated fluid and internal parts. Once you cook the clutch packs and or Bands due to slippage it will only get worse. If its slipping on the shift its slipping in gear . Don't drive it with out the throttle pressure.

When others state you can, It will only work if you tie the trans back to wide open position and shift it with wide open throttle. Many do this to race the car but they are always at wide open throttle. Letting it down shift with the lever tied back can break the band at the strut. Ask me how I know. The band will spin in the case destroying the case and many other parts. Not to mention parts and pieces getting into the converter.

I have many extra 904's when you need one.