pwr2tow

So your saying it doesn't raise peak line pressure, just brings line pressure up at lower throttle settings.

dzltrqcrzy

does the DTT box also raise the mph of the 1-2, 2-3, 3-od shifts, like the TS does ? (thx WHite97GT for the review !)

no_6_oh_no

Thats the end result but not what is being influenced. Line pressure highs and lows are set but the pressure relief valve and TV pressure. A simplified explanation is as TV pressure rises it forces the line pressure up by reducing the return flow from the pump. The pump is easily capable of 100+ psi at 1500 rpms so just dumping the flow back to the pan will reduce pressures.

The shift modifiers cut into the TV motor control wire that sets the TV position like adjusting the cable used to do. They modify the amount of advance based on the APPS position to ramp the TV pressure faster with less APPS movement. The combination of higher TV pressures in relationship to the governor pressure is what gets rid of the shuttle shift. Even with a shift kit governor pressure stays relatively close to stock but the TV and line pressures are raised. This has the same effect and gets rid of the shuttling. Line pressure can stay the same or fluctuate and it won't effect the shuttling.

The positive side of the advanced TV pressure is a slightly advanced line pressure ramp which leads to better shifts and less shifting. However, the TV advance these boxes give is enough to help with shuttle but it is definitely not enough to stop slipping from stock pressures and extra power or hard use. They just don't effect line pressure enough because the whole interplay is a bit more complicated than what I have explained and it is not a direct relationship.

no_6_oh_no

Yes, the different settings will raise the 1-2 and 2-3 shift points for better tuning. Neither effect the 3-4 shift as it is computer controlled and based on a set of paramters that have nothing to do with the TV pressure. The 3-4 shift point may change but only as the result of holding a gear longer/shorter, not from direct control.

krazykiller

little confused but which shift box is the better bang for the buck then?

Minwy

They both do the same thing, any differences are going to be in each boxes own programming. All they do is make the tranny think you are giving it more throttle than you actually are.

pwr2tow

If they are plug and play where do they plug in at?

450r

bump
bump

DirtEater

What for?
What for?

pwr2tow

I think my question. It was the last one and not answered.

CrashCade

Reading the thread it looks like for . . .

1.Where do they Plug in?

2.Which one is more bang for the buck? Which one is less?

no_6_oh_no

Both units require you to cut one wire on the transmission control harness and wire to their harness. The units controll the TV motor so they need to take over functions. Easy to install and take out if needed.

I have the DTT piece and it has been flawless in operation and works with no changes. The DTT piece can be reprogrammed for different trans builds so it is a bit more flexible. Price is comparable.

Make your choice.

twoforme2

yeah it is not a direct plug and play proposition, it does take a little work to install it. Not too bad though, I spent a little mroe time and effort and soldered and heatshrinked all the wires together, some just use butt splices.

BTW I have the DTT, and the main reason I bought that one is I had Goerends stuff put in the tranny and these were preprogrammed for Daves stuff.

Outside of that, I think it is kinda like a Coke or Pepsi Question.

benito

My 1-2 and 2-3-2 were present on the stock transmission w/ smarty, present with my first aftermarket valve body, and then solved entirely by a valve body from dave. Why use a controller to make changes that can be performed with hard parts, when we all end up doing tranny mods sooner or later anyway?

Ben

itr.#1446

Benito how much did the valve body run you? If you don
t wanna share on here pm me I am trying to figure all the options i have on trying to fix the shift problem with my trans