- Charlotte NC
.I have about 300 mi on the transmission and I am extremely happy with it, I still have not resolved the problem being able to read the tune from the TCM.
If I am pushing it as say to enter a highway I still have to lift the throttle to get it to up shift at times, I have not pursued the programming issue at this time because it is actually a minor problem.
Otherwise it is worth every damn cent! with no headwind or a tailwind I can cruise comfortably at 75 MPH with the stock 6.2L, even with a strong headwind (it is always windy down here that is why they are building so damn many of those ugly A$$ wind generators here) I can still push to 75MPH in 5th with no problem, BTW I am running the same RPM at 75 in 5th as I ran at 60 with the TH400, 2900 RPM and in 6th at 75MPH I can barely hear the fan kick in.
Do not get me wrong, I think this was a HUGE improvement but if I was asked about the down side if any I would say that if you are running a heavy HMMWV with a body like the helmet top, (like pulling an open para-shoot and weighs 7400LB) and only had a NA6.2L/6.5L then I would suggest starting with truck with higher gears (273 VS 2.56). But with a 2 or 4 door soft top this combination would be AWESOME!
Of course I am somewhat spoiled by the DuraVee and somewhat crazy, but it is like night and day compared to the TH400, when driving like a sane person it is wonderful to have it shift up through the gears, very much like a late model factory pickup.
As far as operational problems other than the minor shifting issue there has been none, the transmission runs very cool, the highest I have seen is 170 deg F.
I have no doubt that installing the GEP turbo and it's low end torque and extra ponies will will put me over the top..
Dang. Sure is nice to hear about having the ability cruise at highway speeds!