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V8 Dakotas
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Pitbull_1973
Dodge Dakota
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5/28/2005
10:29:55
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 Subject: Help - Auto tranny slipping??
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Hey guys,
I've got a 2001 Dakota 4.7L V8 4X4 Quad Cab with an automatic transmission and 70k miles. Up til now everything's been running fine. Yesterday I drove it all day with no problems. Last night I drove it maybe 3 miles up the street to grab a burger, and when I cranked it up to leave I noticed the Malfunction Indicator Light (as its called in the manual) stayed on. I put it into Reverse and noticed that the gear indicator on the display (that shows what gear you are in) wasn't showing up. Normally its a little box around the P or R or D, but now there was no box. The P,R,N,D,2,1 was showing up fine, just not the box.
I cautiously put it in Reverse and backed out of the parking spot I was in, and dropped it down 2 clicks into Drive and gave it gas. The engine revved and I moved forward slowly, but it was like the truck didn't want to move. I double and triple checked to make sure the parking brake was off, so that's not it. It gradually built up speed and seemed to eventually catch up, but I parked it again in another part of the lot and shut the engine off, hoping that maybe it was just a computer glitch and letting it sit for a few minutes would reset the chip.
But when I restarted it, it was doing the same thing. I put it back in gear and pulled to the exit of the lot (onto what is normally a fairly busy stretch of street) Luckily traffic wasn't that bad and it let me experiment. I pushed the gas down to pull out (enough that it normally would have taken off quite quickly), but it just eased out and slowly built up speed. I also noticed as I came up to about 35mph that I didn't hear it change gears. It felt and sounded like it was in the same gear the whole time. I immediately thought that maybe it was stuck in a high gear (I had that happen in an old Cavalier once), but I quickly realized that the engine hadn't bogged down the way my Cavalier had when I tried to take off.
I came to a stoplight and, trying to still figure out what was going on, I dropped the shifter into L1. When it went green I gave it gas and it seemed to take off normally, when the RPMs hit the shifting point, I bumped it up to L2, but didn't notice any difference, so I bumped it up to Drive and it finally up-shifted and seemed to run normally. I left it in Drive as I turned into my neighborhood and when I gave it gas, it was still lagging, and I could never hear it change gears.
When I got home I let it set a few minutes and popped the hood. Its overdue for service, so I wanted to check the fluid levels to see if maybe the oil or transmission fluid levels were at critical. Oil was fine (maybe a tad low, but not bad) and from what I can tell, the transmission fluid levels were good (although the fluid was quite transparent and it was hard to see exactly how far up the dipstick the fluid was).
I let it sit for about an hour and went back out to see if at least the dashboard display had gone back to normal (the MIL and the gear selector), but they hadn't. I'm probably going to take it to a mechanic today, but being in a new town, I don't know or trust anyone here in the area, so I wanted to see if anyone here might have an idea of what's going on.
Thanks in advance,
-BB
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Snarfblat
Dodge Dakota
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5/28/2005
15:21:15
| RE: Help - Auto tranny slipping??
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I had a similar problem recently with my 1998 5.2 4x4 Automatic. Check-Engine Light came on, and it seemed like I lost 1st gear. I had to buy a code reader for my 98, but you will likely be able to read the codes on your 2001 without that added expense. That's definitely the first thing to do, check the code that forced the MIL to turn on.
The code on mine was:
P1763
Governor Pressure Sensor Voltage Too High.
There's some posts on this site about that issue (great website by the way, extremely helpful). I picked up the Sensor and corresponding Solenoid at the dealer for ~$300Can, they were very easy to put in, and the tranny is as good as new. Actually the tranny is shifting better than it had been for a long while, it will hold 1st gear longer now.
Good luck
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DakotaDown
Dodge Dakota
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5/28/2005
19:43:00
|  RE: Help - Auto tranny slipping??
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I'm having a similar problem. At around 102k miles, my tranny failed. Aamco graciously rebuilt the thing for just a tad under a months salary.
Now, 20k miles later, it feels like it's slipping out of gear. The odd note to this situation is that it ONLY occurs when I turn left. NEVER when I turn right or am driving straight, and I'm not loosing tranny fluid at all.
When it slips, it will reingage after a few seconds. There's no lag in my power (when it's not slipping). Could this be something other than the tranny? I'm not a nooB at cars, but the tranny is my weak point. What about the rear end?
Any help is appreciated.
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Luc
Dodge Dakota
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5/28/2005
20:06:57
| RE: Help - Auto tranny slipping??
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Thats because your tranny fluid is low. Mine did that too. Make sure you check it on a level surface and in NEUTRAL not PARK.
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Pitbull_1973
Dodge Dakota
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5/28/2005
20:59:17
| RE: Help - Auto tranny slipping??
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Ok, I did some checking and figured out the diagnostic codes that were causing the light to come on. 1698 and 0700. I found a website that explains the codes for 2001(http://www.ptcruizer.com/computer-codes.html). Granted, that is for the PT Cruiser, but I think all Chryslers use the same codes (from what I was able to find out, anyway).
Anyway, here is what it says for each code...
1698 - No messages received from the electronic transmission control module or the Aisin transmission controller.
700 - The automatic transmission computer or Aisin computer has a problem - ask it what's going on. I don't know. All I know is that the transmission asked me to turn on the MIL (malfunction indicator light). I did it, didn't I? So why are you bugging ME? ... you may have error code 1776, too. I'd check for that. It's patriotic and more informative.
It looks like my problem has something to do with the transmission controller, or the lack of communication coming from it. I'm just hoping I don't have to replace that. Could get ugly.
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Snarfblat
Dodge Dakota
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5/29/2005
05:36:04
| RE: Help - Auto tranny slipping??
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Here's the code description and other info I was able to find, hopefully that will help you out.
I'm no mechanic, but I think a good place to start would be to clean/reseat the electrical connector on the TCM, and I assume it's connected to the PCM somewhere.
The post at the bottom is from another forum in reference to P0700, and is third-hand knowledge at that. As far as I know, a DRB-III scanner costs a couple thousand dollars, a competent garage or dealer would have one. It sounds like that's what is needed to get the more specific trouble code from the TCM itself.
Good Luck!
EATX = (electronic automatic transmission controller)
Located in the engine compartment, passenger side, mounted to the radiator core support in front of your airbox air-intake-tube.
PCM = powertrain control module
Located in the engine compartment, passenger side, mounted next to your airbox with a crapload of wires coming out of it.
P0700
EATX Controller DTC Present.
This SBEC III or JTEC DTC indicates that the EATX or Aisin controller has an active fault and has illuminated the MIL via a CCD (EATX) or SCI (Aisin) message. The specific fault must be acquired from the EATX via CCD or from the Aisin via ISO-9141.
P1698
No CCD Messages received from PCM.
Bus communication failure to PCM. A Companion DTC was set in both the ECM and PCM.
Post #6
Hey Brad,I posted your ? over on another forum here is the response I got:
It means that there is an active fault in the Transmission Control Module. A DRB-III scanner will need to be hooked up in order to test the TCM for any circuitry failure. AFAIK, the only thing that he will be able to do himself is to disconnect any wiring connectors at the tranny, make sure that they are clean and then snugly re-attached. Hope this helps.-Todd
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pitbull_1973
Dodge Dakota
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6/01/2005
10:37:39
| RE: Help - Auto tranny slipping??
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I have since taken my truck to a local dealer to be checked out. They called me back and said the TCM had failed and would have to be replaced. The price they quoted me on the phone was somewhere around $750 (to be honest I was too busy clutching my chest from shock when I heard the "seven hundred" part of the price to catch what came afterward....could be "fifty", could be "thirty"....byt you get the idea)
I've spent the morning searching the web to see if I can find a transmission controller online to see if the dealership is shafting me or not. Unfortunately, I can't find anything giving me a price for a replacement. All I can find are places talking about reprogramming the controller. At this point its probably too late to stop them since they already ordered the part. I'm just curious as to whether or not this is a fair price for the part (I'm assuming its including labor...at least it better). If anyone can help out with this, I'd appreciate it.
Thanks
- BB
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Rob C
Dodge Dakota
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6/01/2005
11:50:17
| RE: Help - Auto tranny slipping??
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I think you're getting ripped off big time but, I've got a 2000 so I can easily find a TCM online. The 2001 is much tougher. Do you have a part number? If so, you can go to a couple of sites and request a price: http://www.trademotion.com/partlocator/index.cfm?siteid=213896
or
http://www.buymopar.com/
Good luck!
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pitbull_1973
Dodge Dakota
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6/01/2005
11:52:47
| RE: Help - Auto tranny slipping??
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Nope, no part number. If I did have one, I could probably find the part. All I know is that I need a transmission control module (or transmission controller). Any suggestions on how I go about getting the part number?
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Kowalski
GenIII
6/01/2005
12:07:13
| RE: Help - Auto tranny slipping??
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You might want to check out Car-Part.com - many salvage yards show this part used for $125-$200.
Lead, follow, or get out of the way
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