Change the automatic transmission fluid

1997 ISUZU RODEO

49,998 MILES • 6 CYL • 2WD • AUTOMATIC

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3.2L V6 mileage: 50,000. I would like to change the automatic transmission fluid in my vehicle (I am familiar with the procedure on older vehicles) but on my Isuzu the transmission is a sealed unit. It has an overfill and drain plug. I drained approximately three quarts and filled it with about the same amount through the overfill hole so the best I was able to do was a partial change (total capacity = 9.1 quarts). I have searched everywhere for information on how to service this type of transmission (4L30-E) to no avail. Regardless of whether or not it is supposed to be serviced at approximately 100,000 miles I would rather change oil than change a transmission. How do you change the oil on this type of transmission? The service manual I have gives no specifics.

Nov 9, 2010 at 9:12 AM

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First drop the pan and change the filter, then install a new pan gasket and refill the system. If you want to flush the system undo one of the transmission lines and put them into a bucket, then start the engine and start pouring fluid into it, stop once the fluid is clean. Here is a guide that will help you:

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

This unit must be filled from the bottom using a filler tool then you start the car and let it flow out until done then install the plug. Here are diagrams below to show you how.

Check out the diagrams (below). Please let us know if you need anything else to get the problem fixed.

Cheers, Ken

Images (Click to enlarge)

Apr 5, 2021 at 2:09 PM

AMY0177

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To the ones asking about filling it you have to have a tool { which you can get at autoparts cheap} that has two tubes on it and one goes into the drain plug the other transmission fluid. Make sure it can curve at the end cause it goes up and over a medal piece and you have to watch your overfill valve to tell when full but car has to be running look more into it in google

Apr 5, 2021 at 2:09 PM