TR80SD Valve body Transmission parts, repair guidelines, problems, manuals

Transmission general data

Number of gears Transmission Type Drive Torque (Nm) ATF (full capacity) L ATF (change) L ATF type
8 AT RWD/AWD 850 10,5 8 Toyota ATF WS
Part type (1) Expand

Technical issues and repair guidelines

This gearbox as all Aisin RWD transmissions is considered to be “invincible” and maintainable, designed to travel up to one million kilometers with minimum number of overhauls.

The repair kit of gaskets and seals is ordered for reassembly in order to restore leak resistance of jointing edges by replacement of rings and gaskets that helps to the valve body in regulation of gear shifting by the oil pressure. The whole kit of friction elements is replaced when some components get burned. At the same time, it is recommended to change the torque converter frictions in case of burned ATF.


For this transmission automakers used a new torque convertor with a multi-disc lockup clutch in order to guarantee a prolonged service life of torque converter frictions (over 200 thousand kilometers) and at the same time allow the driver to accelerate with the help of forced blocking of the torque converter lock-up clutch in "slippery mode". It significantly increases the transmission efficiency, improves acceleration characteristics, but wears out hard-working frictions of the lock-up. The valve body of this transmission differs from its predecessors TR-60 and TF-60. This valve body will get clogged if it is used with contaminated ATF for several years. Aisin solenoids in contrast to ZF solenoids can withstand much more open-close cycles.