Transmission Fluid Cooler - Backflushing and Cleaning
| CAUTION | Whenever a transmission has been disassembled to install new parts or a new or remanufactured transmission has been installed, a new transmission fluid cooler (either in-tank, auxiliary or OTA) if equipped, will need to be installed. Using a suitable torque converter/fluid cooler cleaner, clean and backflush the transmission fluid cooler tubes. |
| CAUTION | Use only clean automatic transmission fluid specified for this transmission. Do not use supplemental fluid additives, treatments or cleaning agent. The use of these materials may affect transmission operation and result in internal damage to the transmission. |
| CAUTION | When internal wear or damage has occurred in the transmission, metal particles, clutch plate material, or band material may have been carried into the transmission fluid cooler. These contaminants are a major cause of recurring transmission concerns and must be removed from the system before the transmission is put back into use. |
Scheme 50
- Carry out backflushing with a suitable torque converter/transmission fluid cooler cleaner. Test the equipment to make sure that a vigorous fluid flow is present before proceeding. Install a new system filter if flow is weak or contaminated.
- If equipped, remove and discard the transmission fluid in-line filter. (Scheme 50): Identifying Transmission Fluid In-Line Filter
- To aid in attaching the cleaner to the transmission steel cooler lines, connect 2 additional rubber hoses to the transmission end of the steel transmission cooler lines as described. Connect the cleaner tank pressure line to the steel transmission cooler return line (longest line). Connect a tank return hose to the steel transmission cooler pressure line (shorter line). Place the outlet end of this hose in the solvent tank reservoir.
- Turn on the pump and allow the clean transmission fluid to circulate a minimum of 5 minutes (cycling switch ON and OFF will help dislodge contaminants in cooler system).
- Switch OFF the pump and disconnect the pressure hose from the transmission cooler return line.
- Use compressed air to blow out the cooler(s) and lines (blow air into the transmission cooler return line) until all fluid is removed.
- Remove the rubber return hose from the remaining steel cooler line.
Transmission Fluid Cooler Tubes
| Item | Specification |
|---|
| MERCON® V Automatic Transmission Fluid XT-5-QM | MERCON® V |
Scheme 51
Scheme 9: Identifying Transmission Fluid Cooler Tube Components
Scheme 52
Scheme 53
Scheme 54
- With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to «JACKING & LIFTING»(ref-256445).
- Vehicles equipped with a 4.6L engine, remove the fluid cooler tube bracket at the engine. (Scheme 51): Identifying Fluid Cooler Tube Bracket
- Vehicles equipped with a 4.0L engine, remove the fluid cooler tube bracket at the engine. (Scheme 52): Locating Fluid Cooler Tube Bracket NOTE: Use a backup wrench to hold the case fitting secure.
- Remove the fluid cooler tubes at the transmission. (Scheme 53): Locating Transmission Cooler Tubes
- Remove and discard the transmission cooler tube-to-hose clamps and remove the fluid cooler tubes. see scheme 13: Identifying Transmission Cooler Tube-To-Hose Clamps
Transmission Fluid Cooler Hoses
| Item | Specification |
|---|
| MERCON® V Automatic Transmission Fluid XT-5-QM | MERCON® V |
Identifying Transmission Fluid Cooler Components. Scheme 55
Scheme 17: Identifying Transmission Fluid Cooler Hoses Components
Transmission Fluid Cooler
| Item | Specification |
|---|
| MERCON® V Automatic Transmission Fluid XT-5-QM | MERCON® V |
Scheme 55: Identifying Transmission Fluid Cooler Components
