Transaxle/transmission Cooling: Maintenance Mercury Milan I

Check Fluid Level and Condition (All Vehicles)

If the vehicle has been operated for an extended period of time at highway speeds, in city traffic, in hot weather or while pulling a trailer, the fluid needs to cool down to obtain an accurate reading.

The fluid level reading on the fluid level indicator will differ depending on operating and ambient temperatures. The correct reading should be within the normal operating temperature range.

Fluid Level Check

Note. The transmission fluid should be checked at normal operating temperature 60°C-70°C (140°F-158°F) on a level surface. Normal operating temperature can be reached after approximately 32 km (20 miles) of driving and can be checked using the scan tool.

Under normal circumstances the fluid level should be checked during normal maintenance. If the transaxle starts to slip, shifts slowly or shows signs of fluid leaking, the fluid level should be checked.

1. With the transaxle in PARK, the engine at idle, foot pressed on the brake, move the selector lever through each gear and allow engagement of each gear. Place the selector lever in the PARK position.
2. Wipe the fluid level indicator cap and remove the fluid level indicator.
3. Wipe the fluid level indicator with a clean cloth.
4. Install the fluid level indicator back in the fluid indicator tube until it is fully seated, then remove the indicator. The fluid level should be within the normal operating range.

Scheme 172

High Fluid Level

A fluid level that is too high may cause the fluid to become aerated due to the churning action of the rotating internal parts. This will cause erratic control pressure, foaming, loss of fluid from the vent tube and possible transaxle malfunction and/or damage. If an overfill reading is indicated, refer to AUTOMATIC TRANSAXLE/TRANSMISSION - 6 SPEED .

Low Fluid Level

A low fluid level could result in poor transaxle engagement, slipping, malfunction and/or damage. This could also indicate a leak in one of the transaxle seals or gaskets.

Adding Fluid

If fluid needs to be added, add fluid in 0.25L (1/2 pint) increments through the indicator tube. Do not overfill the fluid. For fluid type, refer to SPECIFICATIONS .

Fluid Condition Check

1. Check the fluid level.
2. Observe the color and the odor. The color under normal circumstances should be a dark red color, not brown or black or have a burnt odor.
3. Hold the fluid level indicator over a white facial tissue and allow the fluid to drip onto the facial tissue and examine the stain.
4. If evidence of solid material is found, the transmission fluid pan should be removed for further inspection.
5. If the stain is a foamy pink color this may indicate coolant in the transaxle. The engine cooling system should also be inspected at this time.
6. If fluid contamination or transaxle failure is confirmed by the sediment in the bottom of the fluid pan, install a new transaxle. If installing a new transaxle, the cooler tubes should be cleaned.
7. If the transaxle is to be overhauled or if installing a new transaxle, the fluid cooler must be backflushed. Refer to «AUTOMATIC TRANSAXLE/TRANSMISSION - 6 SPEED»(ref-271076) .

Check Fluid Level and Condition

If the vehicle has been operated for an extended period of time at highway speeds, in city traffic, in hot weather or while pulling a trailer, the fluid needs to cool down to obtain an accurate reading.

The fluid level reading on the fluid level indicator will differ depending on operating and ambient temperatures. The correct reading should be within the normal operating temperature range.

Note. The transmission fluid should be checked at normal operating temperature 60°C-70°C (140°F-158°F) on a level surface. Normal operating temperature can be reached after approximately 32 km (20 miles) of driving and can be checked using the scan tool.

Under normal circumstances the fluid level should be checked during normal maintenance. If the transaxle starts to slip, shifts slowly or shows signs of fluid leaking, the fluid level should be checked.

1. With the transaxle in PARK, the engine at idle, foot pressed on the brake, move the selector lever through each gear and allow engagement of each gear. Place the selector lever in the PARK position.
2. Wipe the fluid level indicator cap and remove the fluid level indicator.
3. Wipe the fluid level indicator with a clean cloth.
4. Install the fluid level indicator back in the fluid indicator tube until it is fully seated, then remove the indicator. The fluid level should be within the normal operating range.

Scheme 173

A fluid level that is too high may cause the fluid to become aerated due to the churning action of the rotating internal parts. This will cause erratic control pressure, foaming, loss of fluid from the vent tube and possible transaxle malfunction and/or damage. If an overfill reading is indicated, refer to AUTOMATIC TRANSAXLE/TRANSMISSION - FNR5 .

A low fluid level could result in poor transaxle engagement, slipping, malfunction and/or damage. This could also indicate a leak in one of the transaxle seals or gaskets.

If fluid needs to be added, add fluid in 0.25L (1/2 pint) increments through the indicator tube. Do not overfill the fluid. For fluid type, refer to SPECIFICATIONS .

1. Check the fluid level.
2. Observe the color and the odor. The color under normal circumstances should be a dark red color, not brown or black or have a burnt odor.
3. Hold the fluid level indicator over a white facial tissue and allow the fluid to drip onto the facial tissue and examine the stain.
4. If evidence of solid material is found, the transmission fluid pan should be removed for further inspection.
5. If the stain is a foamy pink color this may indicate coolant in the transaxle. The engine cooling system should also be inspected at this time.
6. If fluid contamination or transaxle failure is confirmed by the sediment in the bottom of the fluid pan, install a new transaxle. If installing a new transaxle, the cooler bypass valve and cooler tubes should be cleaned.
7. If the transaxle is to be overhauled or if installing a new transaxle, install a new transmission fluid cooler. Refer to «Transmission Fluid Cooler»(ref-271145-S24101595002007110800000) .

Transmission Fluid Cooler

1. Install a new radiator. For additional information, refer to «ENGINE COOLING»(ref-271067) .

Transmission Fluid Cooler Tubes - 6 Speed

Material

Scheme 174

Transmission Fluid Cooler Tubes - FNR5

Material

Scheme 175