They don't work in a truck. For performance anyway. I was a length or so behind Justin (pl4yboy) when his 6l80e decided it just didn't wanna shift with that much power going through it. Limp mode. Results? Two blown head gaskets and it could've been way worse.
2006 SilveradoLittle Black Bitch
Never said it was the best performance transmission. I just said that they have there place where they are undergeared like the G8 and where city driving will be 95% of the driving that it will see, it will make acceleration easy. Not trying to compare your truck to my truck or more importantly my driving style to yours.
And personally, I dont know you so how do I know what you know. Same can be said about me but back to the original question.
Has anyone done it and what can I expect? Dont want to go with the 4L80 due to the .75 4th gear and 2.48 first gear and the 4L60 is known to be weak unless to you want to spend 3k and have it built up by FLT, etc for a 600rwhp potential and even then they are suspect at times.
I know with the G8 at that power level that you have to make it start the shift at 5k instead where it should be but I wont be near 600rwhp but around 450-470 and again looking for more drivability then quarter mile times.
The 4l60e is weak and needs good parts to last, the 4l80e on the other hand takes more power than you will make more than likely in its stock form.Originally Posted by YenkoST
I highly doubt you will want to do the 6 speed. As far as I know you will need an entire TCM, separate from your existing PCM, to control just the trans. I guess if you want to do it that way then do it. If you're worried about gear ratio and shit like that, why not just do a t56 and have your 6 speed and not need to worry about all the other shit involved with the new auto?
T-RAV99 GMC | 5.3 | Skinny White Guy Tuned
Want to keep this one an auto for the wife as I have another project with a manual.
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