48RE Throttle Valve

[DavidShelton]

What are the effects of adjusting the Throttle Valve cable? If I shorten it a little, will the shifts come later? In very slow stop and go traffic with very little throttle input, my truck shifts into 2nd at about 10 mph and to 3rd at about 15mph. I really feel that this is too soon. It is even more noticeable since I installed an HTS valve body and adjusted the bands.

Today, I looked at my cable adjustment and it had quite a bit of slack, so I set it like the manual suggested. It will be Monday until I get a real chance to test it. Is this something that I can mess with to get things "Fine Tuned", or should I leave it alone? Am I barking up the wrong tree?

 

[TCDiesel]

Year/Mods/ upgrades?

 

[DavidShelton]

Sorry, I need to add my signature.

 

[WoodChuck]

What are the effects of adjusting the Throttle Valve cable? If I shorten it a little, will the shifts come later? In very slow stop and go traffic with very little throttle input, my truck shifts into 2nd at about 10 mph and to 3rd at about 15mph. I really feel that this is too soon. It is even more noticeable since I installed an HTS valve body and adjusted the bands.
Today, I looked at my cable adjustment and it had quite a bit of slack, so I set it like the manual suggested. It will be Monday until I get a real chance to test it. Is this something that I can mess with to get things "Fine Tuned", or should I leave it alone? Am I barking up the wrong tree?

The loosest it should be is no slack with throttle closed and starts to move as soon as the throttle does (If you get your head at just the right angle you can see the TV from the engine compartment while manipulating the accelerator cable) At that adjustment you will probably find some slack at WOT. If you want the shifts a little later (and a bit more line pressure) you can tighten it a bit so that at WOT you have full TV travel. At the tighter adjustment you might find harsh downshifting while slowing to a stop or rolling through parking lots.

 

[GColeman]

The loosest it should be is no slack with throttle closed and starts to move as soon as the throttle does (If you get your head at just the right angle you can see the TV from the engine compartment while manipulating the accelerator cable) At that adjustment you will probably find some slack at WOT. If you want the shifts a little later (and a bit more line pressure) you can tighten it a bit so that at WOT you have full TV travel. At the tighter adjustment you might find harsh downshifting while slowing to a stop or rolling through parking lots.

My truck does exactly the same thing. Where is the cable and adjuster? My APPS hangs under the intake manifold. Is everything you are talking about inside there or is this something different?

 

[WoodChuck]

04. 5 doesn't have the cable, it has an electric motor to simulate throttle pressure which is controlled by the computer. Someone (don't know who) makes a box to improve shifting on the later model 48 REs.

 

[GColeman]

Thanks WoodChuck. Hopefully someone will chime in with the info.

 

[WoodChuck]

I found it, look for the TS shiftmaster.

 

[DavidShelton]

Thanks WoodChuck. Hopefully someone will chime in with the info.

Is it the TS Shiftmaster?

 

[WoodChuck]

or DTT's shift enhancer

 

[DavidShelton]

Looks like we posted at the same time.

 

[WoodChuck]

I saw that, but I think I beat you by a hair it would appear.

 

[cerberusiam]

04. 5 doesn't have the cable, it has an electric motor to simulate throttle pressure which is controlled by the computer. Someone (don't know who) makes a box to improve shifting on the later model 48 REs.

Nope, 04. 5 has a TV cable. The electric motor control did not debut until the 05's. Shift enhancers have no where to hook up prior to the 05 trucks.



The TV cable should hook up to the same bell crank the throttle cable does. Just follow th ecables from the APPS back and you will find th eone that goes to the trans.

 

[WoodChuck]

Diesel Performance Specialists

Then why does TS Performance have it listed for 04. 5 and up?

 

[cerberusiam]

Diesel Performance Specialists



Then why does TS Performance have it listed for 04. 5 and up?

Makes ya wonder doesn't it?



In all fairness the description is correct:



The Shift Master is engineered for all 2005-’07 Dodge diesel trucks and installs in minutes.



The header on the part # is incorrect but it is a web page and who knows how the software is configured. This has been pointed out to TS a while ago and evidently it is too minor to change.



It is the internet after all. :-laf

 

[WoodChuck]

I think you might be wrong and the electric TV does indeed start in 04. 5. I don't own one and it looks like you don't either. Have you physically verified this on your own?

 

[cerberusiam]

I think you might be wrong and the electric TV does indeed start in 04. 5. I don't own one and it looks like you don't either. Have you physically verified this on your own?

Yup. March 04 build date, engine mounted APPS, TV cable, no TV motor.

 

[WoodChuck]

so they came both ways on 04. 5?

 

[cerberusiam]

so they came both ways on 04. 5?

Not as far as I know. The TV motor debuted at the start of the 05 year, along with a true TH mode while loosing the ability to lockout OD. The 04. 5 trucks still had the TV cable and TH was simply an OD lockout.



AFAIK, if the truck has an engine mounted APPS, or under battery, it has a TV cable. The true drive-by-wire did not start until they moved the APPS under the dash which was the start of MY05.

 

[E7mack96]

ok, how do you adjust this cable?



Mine has some slack in it and see no way to adjust it tighter.