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Trans fluid service procedure

14K views 21 replies 10 participants last post by  Ma v e n  
#1 ·
I'm looking to take my vehicle to the dealer for the trans fluid replacement. When I asked what the procedure entails they told me that they reverse flush the system.

I read another thread where a GM tech stated a flush was a big no-no and that a scan tool is used in the procedure to verify proper fluid levels or something to that affect.

Can someone confirm what the proper procedure is for the auto trans?
 
Discussion starter · #6 ·
This is the procedure I used, which I confirmed is the same procedure, word for word, from the AllData repair manual:

http://www.justanswer.com/chevy/801b6-chevrolet-cruze-type-transmission-oil-does-car.html

FYI, AllData is a site that independent shops subscribe to. The information is populated from the OEMs to generate a database for performing repairs. This is why your independent oil shops can change the oil in your car.
I wonder why this particular dealer chooses to perform the service differently then? :eek7: Seems simple enough that I feel confident I can do it myself. I just don't want to miss anything important and then discover trans issues down the line...


Procedure posted below:


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  • Start the engine.
  • Depress the brake pedal and move the shift lever through each gear range, pausing for about 3 seconds in each range. Then move the shift lever back to PARK (P).
  • Allow the engine to idle between 500 to 800 RPM for at least 3 minutes, to allow any fluid frothing to dissipate and the fluid level to stabilize. Release the brake pedal
  • Raise the vehicle on a hoist.
  • While the vehicle is idling, remove the fluid level plug (3). Allow any fluid to drain into a drip pan.
    • If the fluid is flowing as a steady stream, wait until the fluid begins to drip. Continue with step 10.
    • If no fluid comes out, add fluid until it drips out of the fluid level plug hole. Continue with step 7.
  • Lower the vehicle.
  • Remove the transmission vent hose (2) and the transmission fluid filler cap (1).
  • While the vehicle is idling, add fluid through the fluid filler cap hole, until fluid is flowing as a stream out of the fluid level plug hole. Wait until the fluid is only dripping out of the fluid level plug hole.
  • Stop the engine.
  • Install the transmission fluid filler cap (1) and the transmission vent hose (2).
  • Raise the vehicle.
  • Install the fluid level plug (3)
  • Lower the vehicle.