Jeepjeepster wrote:
If you search around there are tons of threads on this. The tranny sucks in the libby. Needs an aftermarket torque converter.
It is not the torque converter that is the problem but rather the weight to gear ratio problem
I have a '02 F250 with the 5.4 V8 engine and it has the same trans as the big gas V10 so not a week trans but if I am on dry pavement or even hard dirt and I try to pull a very heavy load ,like another 2wd pu stuck in the mud, the engine will rev to 2000rpm or more but the tires will not spin (over 800# in tools in the tool boxes)
If you look at it as a power to weight ratio ,# per hores power, then the gas liby has about 20# per horse not counting gears
Now factor in gears I know that with 3.73's and 225/75 16's I can get them to smoke in forward and reverse if I can keep the jeep from moving ,when you put on larger tires then you change that ratio from 3.73 to probably 3.27 maby 3.55 and you also give it better traction to not slip or spin so some thing has to give and rather than the thing just breaking a U-joint the trans slips
I would bet dollars to dimes that if you could changed from the 3.73 gears to 4.56 gears with the 245/75 tires then you would never have the trans slipping
I think that if you are going to run bigger tires then you have to change your gears or you have to live with the fact that you will need 4lo to back up a hill