H&S and tow haul

[jdl636]

How does the H&S work with the downshifting and trailer brake control programing when tow selector is being used on the shift lever. I really like the way the OEM control scheme works with my trailer now and would hate to see that compromised.

[drunk on diesel]

If you use the "easy" set of tunes, it uses the factory shifting. It DOES NOT support EGR delete though.

I use easy when I'm up in the mountains. Shifts so much better up there

[WoodBoy]

It should do the same thing that it does factory wise

[drunk on diesel]

if you use the standard tunes or hot tunes, the transmission absolutely does not do the same thing that it does factory wise.

export the files to MCC and take a look

[strokin07]

I've towed on the hd300 tunes using tow/haul seems to do just fine.

Sent from my SCH-I535 using AutoGuide.Com Free App

[tblg700]

I tow on the hot damn tunes all the time, usually on mild or stock. I do not like the way it down shifts when the tow haul is on. When I'm slowing down to stop or just into a turn it will drop a couple gears and go from a nice coasting deceleration to turning very high rpm's and sounding like a big rig. Maybe that is what it is supposed to do, but I don't like it. I'd rather just use the brakes and trailer brakes to slow me down.

[WoodBoy]

Originally Posted by drunk on diesel

if you use the standard tunes or hot tunes, the transmission absolutely does not do the same thing that it does factory wise.

export the files to MCC and take a look

Can you elaborate to what it does differently?

[theplumbingmedic]

Subscribed ......

[drunk on diesel]

Originally Posted by WoodBoy

Can you elaborate to what it does differently?

The shift points and lock up are not load dependent as the factory shifting, and they run the transmission in "hot" mode in order to get third gear lockup at WOT.

That hot mode overrides much of the tow haul stuff.

I've made my own tow specific tune in MCC. The canned tunes work fine, especially at lower elevations, but high altitude mountain driving didn't agree with the standard or hot tunes in my heavy truck

[Capt dong]

The new update is the same as the old mini maxx programs and they follow the tow/haul mode when it's engage. In certain gears the RPMs stay high until it needs to shift regardless of the trans tune you're running and also the exhaust brake work.