8 Speed Oil Level

[redwngr]

Does anyone know what is required to check the oil level in the 8 speed?

 

OM just says it needs to be done by the dealer.

 

A copy of the procedure would be greatly appreciated.

[fondupot]

It's a sealed unit. Only way to check the oil is to drop the pan. I'd let the dealer do it.

 

I stand corrected. I guess there is a inspection hole you can open up on the trans.

[newdude]

No need to drop the pan to check the oil level. Condition? Yes, but not the level.

 

This procedure checks both the transmission fluid level, as well as the condition of the fluid itself. Since the transmission on this vehicle is not equipped with a fill tube and dipstick, a tube in the bottom pan is used to set the fluid level.

Caution: The transmission fluid level must be checked when the transmission fluid temperature (TFT) is between 35–45°C (95–113°F). If the TFT is not within this range, operate the vehicle or allow the fluid to cool as required. Setting the fluid level with a TFT outside this range will result in either an under or over-filled transmission. TFT>45°C=under-filled, TFT<35°C=over-filled. An under-filled transmission will cause premature component wear or damage. An over-filled transmission will cause fluid to discharge out the vent tube, fluid foaming, or pump cavitation.

Note: CTS-V/LT1 Camaro, if running a track session, should have the transmission fluid level checked when the transmission fluid temperature (TFT) is between 55-65°C (131–149°F).

 

Caution: THE ENGINE MUST BE RUNNING when the trans oil level check plug is removed or excessive fluid loss will occur, resulting in an under-filled condition. An under-filled transmission will cause premature component wear or damage.

Note: Continue to monitor the TFT. If the TFT is not within the specified values, reinstall the trans oil level check plug and repeat the previous steps.

Caution: Refer to Fastener Caution.

1. Observe the TFT using the driver information center (DIC) or a scan tool.
2. Start and idle the engine.
3. Depress the brake pedal and move the shift lever through each gear range. Pause for at least 3 seconds in each range. Move the shift lever back to PARK. Ensure the engine RPM is low (500–800 RPM).
4. Allow the engine to idle for at least 1 minute.
5. Raise the vehicle on a hoist. The vehicle must be level, with the engine running and the shift lever in the PARK range.
6. Remove the transmission oil level check plug (1) from the transmission fluid pan. Allow any fluid to drain.
   • If the fluid is flowing as a steady stream, wait until the fluid begins to drip.
   • If no fluid comes out, add fluid until fluid drips out. Refer to Transmission Fluid Fill Procedure.
7. Inspect the fluid color. The fluid should be red or dark brown.
   • If the fluid color is very dark or black and has a burnt odor, inspect the fluid and inside of the bottom pan for excessive metal particles or other debris. A small amount of “friction” material in the bottom pan is a “normal” condition. If large pieces and/or metal particles are noted in the fluid or bottom pan, flush the oil cooler and cooler lines and overhaul the transmission. If there are no signs of transmission internal damage noted, replace the fluid filter assembly, repair the oil cooler, and flush the cooler lines.
   • Fluid that is cloudy or milky or appears to be contaminated with water indicates engine coolant or water contamination. Refer to Engine Coolant/Water in Transmission.
8. Replace the transmission oil level check plug and tighten to 9 Y (80 lb in).
9. Inspect for external leaks. Refer to Fluid Leak Diagnosis.

 

 

Said fastener is located in the oil pan (looks like a drain plug). There is a fill plug on the case to pan surface area, above the pan where the dipstick tube would be on the transmission, passenger side towards the converter. Fluid can be hand pumped or machine fed at the dealer with the GM J-45096 Trans Flush Flow cooler test machine.

[HondaHawkGT]

No dipstick on the 8L90's? I hate the trend with these newer transmissions. It's not as bad as Toyota's sealed 6-speeds that need to be dismantled to change the filter but still..

[newdude]

No dipstick on the 8L90's? I hate the trend with these newer transmissions. It's not as bad as Toyota's sealed 6-speeds that need to be dismantled to change the filter but still..

 

GM Hydramatic FWD transmissions are the same way (6T30/40/45/70/75). Filter is internal, case has to be split. And, they only sell it with the transmission overhaul kit. Alteast the rear drives you can still service the filter on them.

[redwngr]

Thanks 15HDriver