My factory 4L60e transmission on my 08 Alpha cammed just took a sh*t at 126,xxx miles. Which tranny should I replace it with? A beef up 4L60e or a 4L65e<--is that even compatible with the H3's LH8 5.3L v8? Previous owner did alot of off-roading and mudding im thinking that is why the trannys life got shorten or maybe even because of being cammed out it has to much power for the factory tranny to handle. Let me know thanks in advance...
I have a cammed and lifted Alpha T and still on the OEM transmission, not far from your miles. Like Amrg said, 126k miles is pretty good for the original trans, cammed or not. Some people have had them kick the bucket both long before and after 126k so I don't think the cam has much to do with it as much as the driving style did.
That being said, there are a few things you could do to replace it. Could go with a used, new or refurbished unit (cheaper option), OR you could have yours built. If you decide to built it, there are A LOT of different options available.
Really depends on what your plans and budget are.
A low level rebuild with some upgrades may last you another 100k miles. Or if you plan on going big power like I am, you could always upgrade the input/output shaft with new 5/6 pinion planetaries and much more. Lots of options you can do to beef up the 4L60E, but again, it depends on you.
