TF81 (AF21) Archives - Transmission Digest
TF81 AWD Differential Splines

You can now purchase the hardened splines to repair your TF81 differential.

Valve-Body and Gasket Changes for the TF81

The TF81 (aka AF21) valve body has undergone some changes that you should be aware of.

Adjusting Clutch-Control Valves on the Aisin FWD 6-Speeds

Have you ever installed a TF80, TF81 or TF60 after overhaul and it has had harsh shifts or engagements, or maybe there has been a flare/bump upshift or harsh coast-down clunks? Most times, clearing the shift adapts and driving the vehicle to relearn the shifts will correct these annoying problems. After a good, long test drive to relearn the shift adapts, sometimes a shifting or engagement problem remains. Assuming that there is not excessive wear in the valve body and the linear solenoids are good, the clutch-control valves on the valve body can be adjusted to correct these problems.