RE4R01A, R4A-EL, ECAT Premature Planetary Failure
One area requires extra attention when addressing a complaint of repeat or premature planetary failure on this transmission: Clogged or Restricted Coolers The transmission coolers in the vehicles listed below are of the 'Fin' Type design. These fin type coolers will trap any contaminants in the fluid. Once the cooler is plugged or restricted with these contaminants lube oil to the transmission will be reduced. The fin type coolers cannot be properly cleaned using conventional methods. Cooler replacement will be required if the cooler is clogged or restricted. Acceptable cooler flow is 1 quart in 20 seconds returning to the transmission. However, we require replacing the cooler whenever the transmission is replaced. These Nissan vehicles are originally equipped with fin type coolers: MODEL YEAR 300ZX 1990-1992 Truck 1988-1992 Pathfinder 1988-1992 Mazda & Subaru vehicles equipped with this transmission have not had quite as widespread cooler concerns, however it is very highly recommended to replace the cooler when ever the transmission is replaced or repaired.
These transmissions will not be warranteed unless a Transmission Protection Kit part# PTK1 is purchased and properly installed.
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