Sidewinder

Does anyone know how to adjust the throttle linkage on 1995 12V auto? I am trying to get the transmission to shift properly but it seems that when ever I make a change (TPS) it effects more than just the shifting.

I was trying to adjust the TPS but the only way to get the voltage up to 0.8 - 1.2 volts is to adjust the rod that goes to, I think, the injector pump. How is this rod supposed to be adjusted? What does it change when you make it longer or shorter. I found that if I adjusted it so that I got more that about 1.0 volts at the TPS I seemed to have less power. If I adjust it below 0.7 volts then it does not like to go into OD and lockup but pulls good. Am I changing the injection pump adjustment like this? How do I check if the pump is actually at WFO at full throttle?

The shifting problem is the truck pulls OK for a stock truck but during full throttle it will not shift. It gets to about 2500 RPM and just stays there, no acceleration and no shifting. (3k GSK is coming when it warms up) If I let up on the throttle it will then shift and again pull to the next shift point. I have checked the cable and I am getting full throttle at the TPS but I don't know what to check next.

Thanks for any ideas!!!

Crimedog

If it just needs adjusting, take the TPS off, and tap the little metal "grommets" out of the mounting holes. That will give you a little bit of adjustment. I believe there is something behind the TPS that rotates to adjust it, but I am not for sure.

Jim Fulmer

Sidewinder, You have an auto like me so keep this in mind when your adjusting. Adjust the linkage ends so you can get the right voltage (1.0) + or- a tad then make sure you can get WOT with the trucks off (block of wood....another person) if you can then with the throttle on the floor check the TV arm on the tranny and make sure it's within the 1/8th to 3/16's of an inch from being bottomed out....adjust if needed, if you don't have that adjustment right then you will not have the line pressure rise that you need and the shift points will not be right. Now having said that if you make an adjustment to one of the three you should look at the others as all three work together, if after you do this and it still isn't right then push the steel inserts out of the TPS and/or elongate the holes....hope this helps you.

Jim

Sidewinder

Jim,

I think I have just the problem you are talking about. What and where is the "TV arm on the tranny" and where do I check for WOT. I can get someone to stomp on the "gas" peddle but where do I look. If I check at the TPS it seems to fully open but how do I check the pump? Is there a procedure to adjust all of this? Which do you adjust first, second, third? I first thought there was only the TPS to adjust and now it sounds like there is the TPS, the pump linkage and the TV arm on the tranny and they all affect shifting. Is this correct?

The inserts have already been removed from the TPS and I know that the previous owner has been messing around with this stuff already so I want to make sure I get it right.

Thanks

Jim Fulmer

Brian, with the truck off just pull the linkage forward till it bottoms out and make sure that the rear part of the linkage (attatched to the pump) hits the stop, if it does then your fine, if it doesn't then you'll need to adjust the linkage lenghth by snapping it off at the rear were it pushes on, once these are good now have someone push the throttle Wide open with you laying under the truck were the cable attatches to the tranny, you will see the arm moving! With it held Wide open grab the arm and move it further(aft) and see how much play is in it, then with a tape measure as a reference measure the play to see were it is at, if you need to adjust it at the throttle were the TPS is at the kickdown cable has a little black box (button) on it, you'll have to push that button in(I use a snubby screw driver) while you slide the cable for or aft. There are notches in the adjustment so I use those and count were I want it, example.....pull it all the way tight and go in 4 notches then do the WOT measurement again till I get it right) all three.....TPS, linkage and kickdown adjustment affect each other to a degree so I believe they should be all checked.....change one check the others, and I do this with a multi meter probe in the middle pin on the TPS to see were the voltage is at.....I don't use a scanner. If your tranny adjustment is not tight enough you will effect the shift pattern and will not get the line pressure rise needed, if it's too tight it might keep the TV valve in coil bind and hang shift 2-3, Hope this helps you!

You might also look at the rear (pump) linkage arm were it attatches to the pump and make sure it's right with the service manual....assuming you have one.

Jim

Sidewinder

Wow!

Thanks for the info. I will try to adjust all of these next weekend and I will update on the results. I guess I was missing the tranny adjustment AND the linkage adjustment. No wonder I can't get the shifting right.

And no I don't have a service manual YET, that would make too much sense.

cumminsdriver635

My tranny also has a proiblem like the one you guys are describing. I am still confused where you take the reading at to se how many volts you have. Do you check the volts at WOT or idle position? Im also still confused about what you move to adjust the TPS voltage. My truck actually pulls pretty decent, but from the 1-2 shifts it hangs a little, from 2-3 it hangs a little more, and then from 3-4 it hangs up pretty bad a lot of the time. Its a pain in the butt when your trying to get moving pretty quick in traffic. Any help would be greatly appreciated, as i would really like to be able to fix this, or at least make it better.

Eric

infidel

Do not use the linkage adjustment to adjust the tps, you will end up messing other adjustments up. The linkage is adjusted to set the measurement as in this diagram. It will not need adjustment unless you have already changed it.



TPS adjustment instructions-
http://dodgeram.org/tech/transmissio...TPS_adjust.htm
If you can't get the required voltages remove the metal inserts as decribed above and use a round file to oblong the holes. A little goes a long way.

Cable adjustment-doesn't usually need be done unless things have been altered
http://dodgeram.org/tech/transmissio..._lever_adj.htm

cumminsdriver635

Thanks a lot, ill definatley have to try adjusting it sometime soon. Will it try to come apart or anything if I take it off to knock out the little metal pins if i have to? Thanks again. Any luck sidewinder?

Eric

Sidewinder

Eric,

No I haven' been able to try any adjustments yet. I have a more pressing problem with sticking starter contacts that needs to be fixed first. (Starter removal)

I will adjust everything to the diagram as I know for a fact that the previous owner was messing with these adjustments. I'll let you know the results.

kandgo

Take Fulmers advice, I adjusted my TPS as per the factory manual today,and just noticed this thread, as Jim has instructed you follow it,as it is as the manual states to do so.If you do not have a manual I suggest getting one as it is a great help. Mine was out of tolerance by .70 dcv on at rest and almost .72volt at wot,It really shaped up the shifting,especialy the 3 to 4th and TC lockup. Goodluck,,, Rick

Jim Fulmer

Hey rick, your really starting to learn some things now tinkering with the truck! The TPS when out of adjustment sends bad signals to the PCM and that is what controlls the 3-4 and the converter lock up.

Rick, you might have to come out or I'll come over to see the new Twins..............Huge!!!! I should have it all done by weeks end.

Jim

cumminsdriver635

Last night i tried to check my voltage, but i wasnt having any luck getting wires shoved into the connector to be able to get a reading. What did you guys use to stick in there when you checked yours? Do your guys TPS connector plug in at the bottom of the TPS where its hard to get too? Thanks for any help. I really want to try this, and have all day to mess with it.

Eric

infidel

Eric, the way I do it is take a couple pieces of a few inch long stranded type wire, strip both ends about 3/4'', then cut all the strands except a few off of one end of each piece. You can then put the few strands in the female part of the connector and push it back together. Hook your meter to the ends that still have all their strands.
The manual says to use a paper clip in the female part but I've found that the clip stretches out the connector making it loose when you finish measuring.

cumminsdriver635

Thanks Infidel, Ill have to try that .

Eric