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Dewalt
Dodge Dakota
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2/24/2003
19:31:18
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 Subject: rpm fluctuates sometimes when cruising??
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Message:
I have a 2000 dakota cc 4.7 auto i noticed when i took a trip to tampa couple weeks ago on the interstate that my rpm would fluctuate sometimes like i would be crusing at about 2000 and it would like jump to 2300 or so then go back down and it would do it with ac on or off cruise control on or off it seem to be in teh transmission or convertor but i only noticed it then i dont notice any other problems, i am planning on changine my trany fluid and filter pretty soon not sure if the would be the problem or not. Any idea or sugesting on the problem and any tips on doing a complete trans fluid exchange without a exchange machine?
Thanks
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SloDak39
Dodge Dakota
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2/24/2003
19:33:23
|  RE: rpm fluctuates sometimes when cruising??
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Message:
Dude, i can almost gurantee its your TPS sensor. My 1999 3.9 auto did the same thing. Replaced the sensor and that was that.
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dewalt
Dodge Dakota
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2/25/2003
01:24:32
| RE: rpm fluctuates sometimes when cruising??
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Message:
but it seems more like trany problem cause i can push teh throtel and i cant get it to do the same thing so i would thing that coudlnt be the tps to get the rpm to go up real quick like it does u have to floor it then it just changes gears this that happend felt like it was just slipping for a sec ??
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SuperBee
Dodge Dakota
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2/25/2003
03:56:20
| RE: rpm fluctuates sometimes when cruising??
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Message:
either speed sensor or the TC is locking and unlocking for some dumb reason
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SloDak39
Dodge Dakota
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2/25/2003
09:00:20
| RE: rpm fluctuates sometimes when cruising??
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Message:
If the computer is getting an intermitent sigal from the tps while cruising, it could cause the torque converter to keep locking and unlocking....when mine was doing that, thought it had to be the tranny too....but i was low on cash and figured i'd try the tps and it worked....theres a bunch of other people that have had the same problem.....but without experiencing what your truck is doing myself, i wouldn't know for sure if thats what it is......theres some other posts on this site about this......try using the search mode to find em for more info......
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RaZoR
Dodge Dakota
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2/25/2003
09:50:59
| RE: rpm fluctuates sometimes when cruising??
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Are you guys sure its not just kicking in and out of overdrive??? I have a 00 4.7 auto. I find the tranny looking for the right gear and under load will slip back and fourth, especially right around 100km or so???
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curious
Dodge Dakota
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2/25/2003
11:28:06
|  RE: rpm fluctuates sometimes when cruising??
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Message:
I am having the same problem, thought it might just be bad gas... but you all are saying that it may actually be something I need to have looked at? TPS? Do I need to take this somewhere or can I do it myself?
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HSKR
Dodge Dakota
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2/25/2003
11:38:24
| RE: rpm fluctuates sometimes when cruising??
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TPS is most likely your problem. I've fixed a couple trucks for the same reason. Less than $40 at the dealer for a new one.
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Joe
Dodge Dakota
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2/25/2003
11:38:44
| RE: rpm fluctuates sometimes when cruising??
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Hills.
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Porter cable
Dodge Dakota
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2/25/2003
12:33:56
| RE: rpm fluctuates sometimes when cruising??
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Nothing but a fancy black and decker= dewalt.
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dewalt
Dodge Dakota
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2/25/2003
18:58:21
| RE: rpm fluctuates sometimes when cruising??
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Message:
but is the tps casue the trans to slip or conveter to slip casuse that is what this fells like the rpm cant change much when ur just crusing unless u drop down a gear i can pust the gas a little and it just slowy speeds up it dont jump 300 rpm real quick ??
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SloDak39
Dodge Dakota
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2/25/2003
19:46:38
| RE: rpm fluctuates sometimes when cruising??
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Message:
I'm pretty sure its your tps. Mine did that same 300 rpm "bumpig" stuff and when i'd give it just a bit more gas, it would go away. Its the torque converter locking and unlocking due to a bad signal from the tps, its not "slipping".
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Jon Weeks
Dodge Dakota
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8/26/2004
21:47:12
| RE: rpm fluctuates sometimes when cruising??
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Message:
Anyone else tried replacing the TPS for a transmission "slipping" at freeway speed? I have the exact same problem. Around 60 mph on flat roads the rpm will jump up 300-400 rpm periodiocally. Sounds like an easy fix. Where do I look to replace one? I've never done anything with sensors. Any advice on how to replace one would be a great help.
Thanks
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Izzy
Dodge Dakota
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8/27/2004
08:23:48
| RE: rpm fluctuates sometimes when cruising??
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Message:
I haven't noticed mine fluctuating while driving BUT I do notice it doing it while sitting at a stop light ... especially with the A/C running. Seems like the truck is just wanting to go while I sit there waiting on the light to change.
TB has been thoroughly cleaned alond with the stock sensors. If you all think that the TPS sensor is my problem also then I'll change it also. I am just looking for educated opinions before dropping more cash on the truck right now. This was a very expensive month for me due to a $1000 deductible for hurricaine damage (I am in Florida), tires ($465 BFG's), Tranny Fluid/Filter/Flush & oil change ($209).
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forexfour
GenIII
8/27/2004
15:39:45
| RE: rpm fluctuates sometimes when cruising??
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Message:
TPS sensor. I had the same problem and it was a $40.00 fix and about 10 minutes. Left side under the air hat 2 phillips screws.
Forexfour's Home
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Loku
Dodge Dakota
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8/29/2004
21:49:11
| RE: rpm fluctuates sometimes when cruising??
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Message:
Same story here on my '01 R/T.
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Luke
Dodge Dakota
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8/29/2004
23:23:24
| RE: rpm fluctuates sometimes when cruising??
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Message:
yup it is the TPS I to have had this problem.
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Jon Weeks
Dodge Dakota
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8/30/2004
19:00:30
| RE: rpm fluctuates sometimes when cruising??
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Message:
Thanks guys. Looks like you were right. I replaced the TPS and no more problems. Thanks!
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