Originally Posted by mkurkowski
i REALLY don't want to go to an auto, i have just always been a stick person and i love the ZF6. i have had good luck with them if you keep if full of high quality lubrication, but have never put 1000 ft lbs through it either. i guess i would consider going to an auto if that's what it takes to keep it together. BTS after the ZF6 flies apart?
been doing some research other places and it has been suggested i run a set of 238/80's with gearhead tunes. good plan for that 68/74/1.10?
let me know what you think.
BTW, i realize thats asking a lot out of a motor with 305k. the plan is to overhaul it next winter. if it flies apart between now and then, i have alternative forms of transporation.
The concern is the weight that'll be on it every day, with that power.
If you actually drive it like a stockish truck, the ZF6 might do alright. But that's gonna be hard to do.
And even driving it conservatively, there's a guy in GA with a F550 on his third ZF6 in the last year, due to towing heavy/aggressively. And that's at just over 300hp IIRC.
238/80's with Gearhead tunes ought to do great.
And if it's been maintained halfway decent, 300k is nothing to be afraid of.