I have the edge juice attitude screen and i watch my torque lock up. it obviously does it in 4th (overdrive) or in 3rd when i press tow/haul button. But sometimes when its cold outside (-45 C) in winter i drive around town in 2nd just to help truck warm up faster. and when i do i notice sometimes torque locks and sometimes it doesnt(according to juice screen). Is this normal? should or can your torque lock in all gears, 1,2,3,4th 9OD)? Im not for certain but sometimes it seems like truck /tranny shutters when torque is about to lockup.??

 

On the 06's and up, I know that the TC will lock in 2nd while in T/H, in 3rd while in T/H, and in 4th normally. It won't lock up in 1st though.

 

is it possible to get a shudder in the TC? or is it on its way out then?

 

I know on my 04 it will lock if I am in manual 2nd regardless of the tow.haul button. I am sure someone with more knowledge will jump on here or do a search as I know it has been discussed a few times.

 

thanks for info guys. very appreciated.

 

48re Lock up in:

1st- will lock up only with a T/C lock up switch
2nd- will lock up if manually placed in 2nd (about 25-30mph)
3rd- will lock with tow haul.
4th- will lock up around 45-50 mph. and will stay locked unless forced out while shifting or slowing down below 45 mph

 

Sound's like it's on it's way out if your getting a shudder. I have never encountered it with mine.