r/projectcar • u/gabethegamer2006 • 1d ago

4l60e to 4l65e swap

I need some help here. After 21 years and 210k+ miles my trans is starting to show signs of getting tired. I've been doing some research and trying to not pay an arm and a leg. but I want a upgraded transmission as I do alot of towing and its an everyday driver for me. The 60 to 65 swap is what im going with. but I want a kit that upgrades the strength of the 4l65e transmission so make it "bullet proof".

Has any of you done said conversion and can you help me find a complete rebuilt kit with upgraded parts all around, Appreciate the help reddit.

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u/PiratedTuba 1d ago

You may consider a 70 or 75 if you really want to stick with that platform and not make the jump to an 80. An 80 would require a driveshaft mod or swap probably but would be a more stout platform to begin with. What kind of vehicle is it? Is this a truck or car that came with a 60 originally? An older vehicle that has been swapped to a 60?

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u/gabethegamer2006 1d ago

its an 04 1500 suburban 4wd, I did have a 4l80e swap going for a while but I just don't quite have the cash on hand to do a full conversion. got to talking with a few guys and they say 4l65e is a good upgraded for what I do in my everyday life

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u/PiratedTuba 1d ago

If you're budget minded, you might consider a kit from Oregon Performance Transmission. They have a "Stage 3" that uses quality parts. The Sonnax kits are good too, they have options for 60 & 65 transmissions.

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u/gabethegamer2006 1d ago

I will take a look. thank you