Al Ex

I keep it in Two-Haul “all the time” because the shift points seem better suited to the truck the way I drive unloaded - don't tow anything…. Is there any problem with this? Will I cause any premature trans wear or breakdown?

I do run a Smarty JR @ 100% POD, but I drive very light footed and only use the power for passing acceleration when needed. I just don’t like the trans shift points in standard “drive” mode, never have. It seems like it holds shift points too long, especially going from 3rd to 4th (final shift @ 50 MPH). I’ve always driven it this way since new – now has 91K.

bigwheels94

I drive in T/H all the time, untill I cross the 60 mph mark. Then I'll let it shift into O/D for milage. Obviously this is depending on loads, & road conditions.

Al Ex

Tow-haul on the '06 allows OD in 4th, so you still get fuel savings benefits. But I seem to remember reading somewhere you won't get as good of MPG using TH. However, I've never noticed a difference myself... I always average about 20 MPG - slightly better in summer, less in winter.

2007 5.9

T/H everytime I put it in drive. Been doing it for 70k!!!

Shorts

I run in TH all the time. Hadn't had a problem.

AkitaSumo

God I hope not, been running it every day. First thing I always do before I take her out of park.

Sevir

i run it all the time under 60MPH, anything above that i click it off for mileage. it does improve mileage for around town driving.

BPoulsen

I always run in T/H - I lilke the shift points better. Been doing it for 60k with no problems.

knc77

T/H for 80,000 miles (provided I remember to turn it on when I start the truck ).

Mileage is an interesting comment. If I am correct, T/H (at least on my 05) simply adjusts the shift points and locks the TC sooner. I get OD and lockup at 45 mph rather than 50 mph with it off. I like the TC locked and would think not slipping the TC and wasting energy would be more efficient.