New tranny for 02 LS1

Anybody have suggestions for new transmissions on an 02 LS1? I need something that can handle 6500 RPMs and I can't find squat on the Internet. Please help me!:cry:

manual or automatic?

automatic

GM now builds a 4L65E instead of the regular 4L60E.........apparently it comes in Avalanches or something?:think: Regardless, I read an article in a magazine about them, and they're pretty much a 4L60E with upgraded internals, such as stronger input and output shafts, heavier duty clutch packs, and stronger planetary gears (or whatever the heck are used inside automatics?!:p). I'm sure that you could just build up a 60 to what the 65 is, but to save the trouble, you can simply buy a 4L65E and be done with it:cool:.

HTH

Are there any race transmissions or anything like that out there specifically for the LS1?:confused: I'll be pushing close to 420 rwhp and need something that can handle that kind of power. I don't think the stock tranny can handle that.

I went through 6 4L60E's so I know they are junk.. Ya can go TH350 or 400 and be done with it. .but ya will have a manual valve body most likely..


Get it done right tho.. no sense in wasting $ on a motor that cant be used..

Originally posted by psychocabbage
I went through 6 4L60E's so I know they are junk

They are not all junk. The ones that you had were, but that doesn't mean they all are.
I have over 500 passes on my stock one with 200 of those passes with a high stall and slicks. Oh and that's pulling 1.64-1.75 sixty foots and running low 12s at 110 plus. Not junk.

Many companys build 4l60e transmissions that claim 500-650 hp capabilities. But I can't and won't recommend any because I have no personal experience yet.
Check out the vendor index. Speed Inc and some other supporting vendors have built transmissions for sale.

Century transmision.

http://ls1speed.com/catagory.cfm?catagory=trans

These should help or give you an idea of what is out there.

Thanks. That website really helps!:thumb:

the harsh hits on the tranny are on thing.. the repeated 140+mph runs with 110+ sustained for over 35 min at a time... daily.. (to and from work) not the same thing... and thats what was killing my trannys.. And yes, I had a cooler on it too..