Maybe the factory Allison valve body can flow a lot more oil than an RE VB, I don't know. I just know that the big names make a huge deal about how they enlarge all the oil passages for more flow, and so on, for all three brands.
Probably close to the same, except that you'd hear it shift one extra time... I don't see how the Allison converter is any better, or tighter. The main thing I'd like to have, much more than an extra gear, is the grade braking and simple spin on filter. I can't believe it's taken this long for a factory auto to finally have a spin on filter.
In my experience, the Allison just feels like it shifts alot smoother and faster. RJF, I recomend that you try and pull a trailer with the Dmax/Alli and see for your self. I honestly use to trash the Dmax cause it was a V8, but once a buddy of mine let me pull a trailor with his truck I was totally taken by suprise. The Cummins is an INCREDIBLE engine!!! With the auto they work fine, but compared to the Dmax/Alli, I truly belive it is just a better combination and will out tow the Cummins with an Auto.
The Dodge 6 speed auto will almost definitely be an 68RFE for regular pickup trucks (ie: not chassis cabs). Iirc it is based off the 48RE so hopefully they beefed up some of the weaker parts. I am all stock, but don't like how the 48RE is shifting lately, only 20K too
I have never driven a Duramax, but they make it sound like the most trouble free of the big three? If you want a truck to modify, the Cummins is easy to modify for big power, but the stock transmission needs help. I'm ready to replace my stock converter, it's just too loose after adding 140+ HP over stock.
On my 2001 CTD I put a DTT VB and TC in at 80,000 miles +-. I put a total of 423,000 miles on that truck and I never -REPEAT - never rebuilt the tranny. I used and abused that truck. It had 360 injectors, edge race box, and a few other goodies. The Allison is a great tranny, but there were sure a lot of dodge re trannies spankin their a$s at the DHRA in Houston last month.
im sorry, i really just dont like the duramax, but i agree the allison is a much better tranny than the 48re, all the auto dodges ive driven are worthless! the duramax would run circles around em, but put a 6 speed behind the dodge and wave good bye to the duracrap. i own a 6 speed cummins and have waved bye to plenty of duracraps, but if mine was an auto id be watchin the tailgate of the duramax or powerstroke getting smaller and smaller. well actually alot of powerstrokes beat me now...hmmmm o well!
i sure have. ive driven about 6 of em. including an 06. and it just doesnt seem to pull as good as the other two. maybe i just happen to find 6 bad ones, but i dont know. ive never drivin a cummins or powerstroke that had a problem with a hill. but i sure liked that tranny. except in tow mode, it jerks u bad.
