FNR5 - Automatic Transaxle
Transmission Fluid CoolerCAUTION: Whenever the transaxle has been disassembled to install new parts, clean and backflush the transaxle fluid cooler, or damage may occur.
NOTE: Cleaning and backflushing the transmission fluid cooling system along with normal cleaning and inspection procedures during disassembly and reassembly will keep contamination from reentering the transaxle and causing a repeat repair.
When internal wear or damage has occurred in the transaxle, metal particles, clutch plate material or band material may have been carried into the torque converter and transmission fluid cooler. These contaminants are a major cause of recurring transaxle troubles and must be removed from the system before the transaxle is put back in use.
Transmission Fluid Cooler Flow Test
NOTE: The selector lever linkage adjustment, transmission fluid level and line pressure must be within specification before carrying out this test. Refer to selector lever linkage adjustment procedure. For transmission fluid level checking procedures, refer to Preliminary Inspection. For transaxle line pressure testing, refer to Special Testing Procedures. FNR5 - Automatic Transaxle FNR5 - Automatic Transaxle
1. Check the transmission fluid level and fill as necessary.
2. Remove the transmission fluid level indicator from the transmission filler tube and install the funnel in the transmission filler tube.
3. With the vehicle in NEUTRAL, position it on a hoist. Refer to Maintenance/Service and Repair. Inspect the transmission fluid cooler tubes for damage. Install new transmission fluid cooler tubes as needed.
4. Disconnect the transmission fluid cooler return hose from the transmission fluid cooler return tube.
5. Plug the transmission fluid cooler return hose to avoid transmission fluid loss.
6. Connect one end of a hose to the transmission fluid cooler return tube and route the other end of the hose up to a point where it can be inserted into the funnel at the transmission fluid filler tube.
7. Start the engine and run at idle with the transaxle in NEUTRAL range until the automatic transmission fluid is warm. Temperature is important to the flow rate measurement. Carry out the Transmission Fluid Cooler Flow Test.
^ Once transmission fluid flow no longer has air bubbles in it, remove the rubber hose from the funnel and insert it into a liter container.
^ As soon as 0.95L (1 qt) is dispensed into the container, install the hose into the funnel.
^ One quart of transmission fluid should flow through the cooling system in approximately 17-21 seconds.
8. Once adequate flow is determined, shut off the engine, remove the extension hose and reassemble the transmission fluid cooler tube with the constant tension clamp.
9. If flow is not adequate, stop the engine. Disconnect the hose from the transmission fluid cooler return tube and connect it to the converter-out line. If flow is now liberal, install a new transmission fluid cooler.
10. Check the transmission fluid level and adjust as required.