Originally Posted by KTMotoRider1
My dad had an f450 and it locked up pretty early especially for being stock but I think that's because it had 4.88 gears. I'm just lookin to have a little more lockup time the 35 inch tires, and slightly higher stall converter have lessened my towing performance up slower steep grades. The thing still pulls a heavy trailer like a raped ape but I figure it would be alittle more comfortable with an earlier then 45 lock up in 3rd gear or even 4th as long as it didn't shift to early and bog it down. While in tow haul only have 3-4-5 be locked.
The 35inch rubber will mechanically convert you 4.88 to something closer to a 3.90 that is quite a change from a towning capability prospective but then again we have 5/6 gear to choose from. I am not sure why you have a higher stall Torque Converter??? As I understand it the 6.4 peaktorque is around 1800 rpm and the stock TC stall is around 1800 why have a stall above that unless tuning has changed where peak torque hits. I would think a lower stall would produce better results performance wise (hauling/towing).
Locking up lower gears is high on my lest as well as long as lockup doesn't happen too early and can be controller by both power/torque demand and load.My Tow haul program locks up 4&5th both not 3rd. The one way clutch or what ever it is called in 3rd lock in but I do not show the TC locked up on the tuner.