did you check the computer for codes?? sounds like the speed sensor
CHRIS

 

Maybe try another computer. It could be going bad.

 

He didn't mention codes and I didn't have time to do the key trick or read what the parameters were doing with my scanner(does real time reads while runnig).
I was thinking speed sensor with the cruise, but I didn't realize that controlled the OD.
I guess that makes sense.

Thanks.

 

i had the same problem with mine it's a 93 5.2, and on the way home from work it wouldn't switch into od but i did pull a code (15) and the check engine light did come on, that should have a cable operated speedo, the sensor is located on the end of the cable going into the trans, it will have a plug on it and it's a oval shaped box, hope this helps

CHRIS

 

My Cruise has never worked, but my OD recently went out. Could there be a code if the Check Engine Light never came on? It does work as I have had other codes in the past.

 

Overdrive not working & Cruse not working

I have a 93 Dakota with a 5.2 in it there are 4 speed sencers on it check the one on top of the thirdmember if it has a build up on it take it loose an clean it also clean the band inside but be very careful not to get your finger cought in it when you turn it or you could loose a finger tip also on the cruse check the fuse box under the hood because the fuse could be bad thats what i did to fix mine. billy

 

I have a 93 Dakota with a 5.2 in it there are 4 speed sencers on it check the one on top of the thirdmember if it has a build up on it take it loose an clean it also clean the band inside but be very careful not to get your finger cought in it when you turn it or you could loose a finger tip billy

Could you elaborate on this further? Where is this sensor?

 

djturnz the speed senser works off of the computer in your truck it tell the trans when to shift into overdrive,it also controls the abs system for your rear brakes, and it also tells the trans when to down shift from overdrive when you get under the speed of 45 miles per hour. the sensors are located,#1 on the end of your speedo cable,#2 is on top of the 3rd member houseing,#3 is on the left rear brake asembly #4 is on the right rear brake asembly.

 

Could any one of these be causeing the OD problem or just one specifically for the OD? I pulled a sensor out of the transmission. It is located on the driver's side almost all the way back by the rear seal and is held by 1 bolt. It sort of reminded me of an H7 headlight bulb. Where is the third member? Where is the one on the speedo cable (if it could be that one).

 

djturnz the 3rd member is the big thing in the middle of your rear axle where the gears are housed,the sensor is located on the top.the sensor for the speedo is on the end of the cable you have to take the cable out of the trans, the cable is on the left side of the trans.

 

Is the speedo sensor the one I pulled out on the left near the rear seal?

Could either of these caused the problem?

Is there a way to test them to see if they are bad?

 

djturnz the sensor for the speedo on my dakota is on the end of the cable, and I had to pull the the speedo cable out of the side of my trans, as far as testing the sensor I donn't know how you would test it. I just replaced mine and the over drive started working, find someone who has a code reader and do a code check that should tell you which sensor is bad & needs to be replaced. when I replaced the sensor in my truck last year,the new sensor only cost me $18.99 + tax at the auto parts store.

 

Well I broke it now.
I was trying to pull the wheel speed sensor from the rearend and it broke off . Everything from the O-ring down is sitting just below the surface of the hole and I can't fish it out. Unless someone has a better idea ,I am going to have to pull the rearend cover and see if I can push it out from inside. Now I read that I might be working with the wrond sensor anyway and that the sensor I want is on the tranny? As soon as I started the truck while the sensor was disconnected (before I broke it) the ABS and parking brake light came on.

Any Ideas? Or is pulling the cover my best option?

 

djturnz you'll half to pull the cover to get that brokeoff peace out,I was checking the parts bill where I bought the sensor and seen where I purchest 2 sensors one for the rear end and one for the tranny.

 

Ok, so the one for the tranny, is that the sensor that is attached with 1 bolt on the left side of the tranny, almost all the way back? It has a wire harness plugged into it. And the piece on the inside has a square metal post about an inch long and 1/8 inch thick. It looks kind of like the end of a speedometer cable for an older japanese motorcycle, if that helps. Is this the one you speak of?

 

djturnz yes it must be,but when I replaced the one my tranny, I had to pull my soeedomiter cable out to get to mine.

 

Maybe it isn't the one. There is only a wire harness attached, no speedo cable. Is this supposed to be a mechanical cable?

Also, how do Iknow what size rear I have to get the gasket? Advance Auto's Website lists 4 different sizes. I am at work now, so I can't look right now. But is it stamped somewhere, or do I have to measure something? If so, what do I measure?

Also, recommended rearend fluid?
Thanks again.

 

http://www.partsamerica.com/Product...a.com/ProductDetail.aspx?mfrcode=NIE&mfrpartnumber=AL1050&parttype=1061&ptset=A

This is the one I am talking about that's in the tranny. Is this the speedo-cable sensor?

 

djturnz there should be a tag on the rearend tell which one you have,also it is listed in the owners manual if you still have it. also you can take the cover that you took off the rearend and match up the gasket to it all you need is to make the bolt holes all line up,& if the gasket is not thick enough just purches 2. the sensor on the tranny you found with the wireing harness pluged into it that is the sensor that the computer tells the tranny when to shift. Find the cable that comes out of the firewall down to the tranny,it will be closer to the front of the tranny take out the cable and the sensor is on the end of the cable that goes in the tranny.

 

So is it the tranny shift sensor, or the speedo cable sensor that controls over drive?

 

If you get the fluid from the dealer, they can look it up......It will just be expensive if you get it there.
Look under your hood and see if you can find a build sticker with the rear ratio and if it says LSD or Limited Slip Differential.
I am not sure if the tag is in the same spot as on the vans.
If it is a limited slip, you will need the additive for it in addition to the gear lube.

 

When I spin the tires they both spin, so I do believe it is LSD. What is the additive?

 

Ok replaced the sensor on the differential (Wheel speed sensor), also replaced the "Vehicle speed sensor" on the left side of the tranny towards the back (transmission extension housing). From what my chilton reference Cd says, there is no speedo cable. There is the Vehicle speed sensor with it's wiring harness. The sensor plugs into the transmission through a colar called the "speedometer coupler drive" or something like that. Still no OD. Any other ideas? Can I have it scanned to find the problem? The check engine light isn't on.

 

djturnz
Have it scanned, it can't hurt. Solenoid or wiring may be bad?


Description and Operation

CONSTRUCTION
The overdrive solenoid and TCC solenoid are molded together. They are only used on automatic transmissions.

OPERATION
The Powertrain Control Module (PCM) operates the overdrive solenoid by providing a ground path on circuit T60. Circuit T60 connects to PCM cavity 55. Circuit A21 supplies battery voltage to the overdrive solenoid.

 

Description and Operation

CONSTRUCTION
The overdrive solenoid and TCC solenoid are molded together. They are only used on automatic transmissions.

OPERATION
The Powertrain Control Module (PCM) operates the overdrive solenoid by providing a ground path on circuit T60. Circuit T60 connects to PCM cavity 55. Circuit A21 supplies battery voltage to the overdrive solenoid.

TCC solenoid? Location?

OPERATION: Can I follow these references in the wiring diagram in my Haynes or Chilton? To check these pins for voltage and ground?