Jambbii

I have been doing some testing with my lastest combo and I have found out that I can't shift into overdrive with the converter locked at full throttle. Pretty sure its not the button because it works fine otherwise. I always used to be able to do this.

Any clues?

infidel

First thing I would try is adjusting the TPS

Jambbii

I will give it a shot, truck just started shifting in and out of O/D like crazy.

marine4life

take the tps off and clean it, mine did the same thing, except i replaced mine with a new one($140) however later i found out my old one was just dirty.

cwgermany

Hello 2gether,
xcause my bad englisch, woud someone explain to me what is a TPS and were I find it in a Dodge 2500 4x4 1998 ?

thx cw

infidel

TPS = throttle position sensor. It is used only on automatics for shifting.

cwgermany

so it looks like i got the same like that, it´s between 45 an 50 and 1500- 1800 rpm.

coud it be something else ?

thx cw
Ram 2500 24V
1998
Atomatic Transmision

infidel

Yours could actually be normal. From the factory OD is set to engage at 47 mph, you might just be right on the line, tipping back and forth.
When the TPS is giving trouble it will hunt back and forth at higher speeds.

Best practice to make your tranny last longer and to avoid the hunting in and out of OD is to push the OD off button unless you are cruising over 55.

garretch

i had close to the same problem. i found in the haynes manual that the tps data "when relayed to the pcm...enabled the computer to determine 3-4 upshifts and 4-3 downshifts for transmission op".
it said to disco the tps connetor and check the voltage from the pcm. positive to purple/white and neg to black/light blue. the voltage should be 5v. then put the connector back on tps and check the voltage thru the tps. pierce the wire and hook the pos to the orange/dark blue and the neg to the black/light blue. the valve shut read about .5-1.5 volts. when you open the valve the voltage should change. full throttle should see 3.5-4.5 volts.

this worked for me. changed the tps and it shifts smooth. freekin thing cost me 200 buck tho.

timeagain

YEA!!!!

cwgermany

thx fok´s I will try this on the weekend

cu

cwgermany

Hy att all,

i chekt all +/- wire und change the batteries, also I "oild" all plugs and do some wirework , thats take 1 1/2 houres and the problem is gone

thanks for your help

cw

9512vCTD

hey jambii i seen you have 4.10 gears, Im tachin 1900rpms around 65mph with 285s on my truck now i just took my 40s off and it was differen't then. But i was curious when your truck was stock was this similar to what you were running? One thing i do hate is the gearing sucks for high end speeds its reving so **** high..

Jambbii

4.10s and 38s are prerfect for the highway. I love them.

cwgermany

Here I am again,

it works for some Day´s perfekt, then i drove 600mi "Hayway" and it starts again.

is ther a way to check the TPS ???
What did I need for and if it is broken how mutch is a new one and
how i find the right one ? for my Dodge 2500 PU 1998 / 5 24V

??

thx cw