[Rivelite]

Hello All,

Quick question for clarity. The previous owner of my truck has a documented 50k transmission fluid exchange interval that I would like to keep going. Being right at 150k, I will be scheduling a simple drain and fill transmission service with new filter and I am also considering have the shift solenoids (OEM) changed for preventative maintenance as well. My questions is how can I confirm which transmission I have. The RPO code in my glove box says M32. When I cross reference online, I see both transmissions under the single RPO code:

M32~ 4speed, HMD, heavy duty 4L60-E/4L65-E

Any ideas or direction is appreciated!

 

[tokuzumi]

The 6.0L Escalades had the 4L65e. Maybe the 5.3L Escalades had the 4L60e? The difference between the two transmissions is negligible. Both will bolt right up to your Escalade, and shift solenoids would be identical. Fluid capacities are the same as well as transmission pans/gaskets/fluid requirements.

 

[carguy75]

The 4L65e is often referred to as the 4L60e HD( Heavy Duty version). Confusing, but the same beefier transmission.

 

[carguy75]

Additional information on the 4L60E and 4L65E

700-R4 Vs. 4L60E Vs. 4L65E - Hot Rod Magazine

The Turbo-Hydramatic 700-R4, 4L60, electronic 4L60E, and the 4L65E, were all designed to replace the tried-and-true TH350. Read more in this Spotter's Guide.

www.hotrod.com

 

[Rivelite]

This is all good info.

Much appreciation for the research and time spent responding here!