Will running in T/H mode empty damage the trans?

Why does the trans need to jump the RPM's up to 18k to make the last shift?

I have the 3.73 rear. I can't post any more info cause the site times me out now[:@]

 

I've ask he same Q and have been told the you will get better MPGs around town with T/H on. also it changes the shift points to a higher RPM in T/H

 

Will this work the same for the O/D off button.

 

I've tried this myself (driving in Tow/Haul) and I don't see any evidence of fuel economy improvement. I suspect this is because your best bet at increasing city MPG is coasting to stop lights/signs and down hills. Since tow haul locks the TC, it ends up acting as an engine brake which ruins the coasting MPG benefit.

 

it locks the torque converter sooner and holds it longer, when coasting to a stop if you have it in t/h mode, the TC will lock back up as it downshifts IIRC.

 

It will keep it locked almost until you stop. As you get down to around 1100-1300 RPMs, it lets go. Sound like a mini Jakebrake almost.

 

OK so here's a question?

When towing?? Should you turn tow/haul OFF once up to speed?

Oh and I must add I love my Jake w/ a load on the truck We are dragging a 97 Escort home w/ probably 800 lbs of stuff in the bed. Hubby is actually letting me drive too I'm getting pretty quick at flipping that lever when it is time to slow down

 

Nope, leave it on. That way it it drops to 3rd it still locks your TC. Plus your jake is more effective with TH activated because it keeps the TC locked until almost stall.

 

much easier to ask you guys a stupid question than the hubby

Thanks Rich!!!

 

Weel, tha`s cuz us stoopud fok`s giv reel stoopud ansers