Cummins12V98 wrote:
Bionic Man wrote:
The video that the troller posted originally has nothing to do with the HO engine and the Aisin transmission. It’s the old 68RFE that can’t handle the high output.
So, without question, a 2500 would perform better with a different transmission (preferably with 8 or 10 gears) that can handle more HP and TQ.
And if we’re making requests, let’s do a ZF since they are one of the best. And no, I don’t care even a little if the transmission is outsourced.
My 11 HO DRW 3.42's with 68rfe did a fine job with none of the complaints from others towing 30k combined. Probably because I ran the HE!! out of it for the first hundred miles, trained it well. Nice firm shifts! The only issue was getting the load rolling on grade. If it had 4.10's I would probably still own it pulling 35k+.
Ron,
You have just described the positive for the 8 and 10 sp transmissions. You won't need 4.10s with a 6 so to move 35k lbs. Because the 10 sp that Ford and GM use has a 4.56 iirc 1st gear vs you 3.5x. reality is, a 10 sp will have an overall low, lower than a 4.10 geared rig, yet give you the low rpm freeways gears.
My 6sp 4.3v6 has more torque hitting the ground than ANY of my 4.10 gear 4 so autos. I have a 4.10 in first, instead of a 2.48 in 1st, I can multiply more with my ra at 3.42.
This is what your missing with a 6 so vs a 10 sp.
My 6sp is better than my 4 so autos, not as good as the 8 so at 4.3 in 1st, 10 sp is about 4.5x. that lower gear you want for startup is in the transmission!
Ye Ford4x is correct, you may not tow much faster up hills on a freeway grade, UNLESS you can get more HP and or torque to the rear wheels.
Marty
