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#915 of 1029 2005 Dakota tranny slips for when cold at first start
Aug 31, 2011 (7:53 pm)
Hello, I have no idea whats wrong but when I first start my truck when its cold it seems to have no presure in the transmision for about 30 seconds and then it finally grabs and from their it runs and shifts fine... no trouble codes yet... anyone no possible solution to this issue???
its a 05 Dakota 4.7l v8 qaud cab 2 wheel drive... has 60,000 miles runs strong just the initial stall till it ingages..
I thank Anyone that has any knowledge bout it....
#916 of 1029 reply: 2005 Dakota tranny slips when cold
Sep 01, 2011 (4:45 am)
Not sure what transmission type your truck is using but the way the Chrysler automatics work is that in Park, the torque convertor is not completely filled. Once you start it up and
shift into Neutral, the transmission fluid pump (running with the engine idleing) will fill up
the torque converter so that when you switch to Drive, the torque convertor is operational.
That is why you should always check fluid level on Chrysler transmissions in Neutral, not
There is a drainback valve located in the transmission line next to the radiator that prevents
fluid drainback when the vehicle is parked for a lengthy time. Maybe it's blocked and restricting
fluid flow to the pressure pump in the transmission.
The other thing is that it takes a second or two, to build up the pressure in the govenor pressure solenoid/regulator valve on the transmission control body to allow the PCM to shift for you.
There is a fluid pressure sensor in the govenor regulator transmission that feeds back
pressure information to the PCM to allow shifting.
There is also a temperature sensor that tells the PCM when the correct transmission temperature is reached (thermistor) for overdrive operation, but this shouldn't affect
the lower gear shifts.
Auto transmissions are very complicated, so it's hard to zero in on what the problem may be
in your case, as there may be a simple cause for the delay in your case.
Inside the transmission control valve body there are 1-2 , 2-3 and 3-4 (overdrive) shift valves, as well as the planetary gear set and a forward and rear clutch and bands that control shifting. Correct fluid pressure is required for these to function in normal operation.
#917 of 1029 Re: Ive got issues [sailinsolo27]
Sep 09, 2011 (12:36 pm)
I've got a 92 Dakota with 177K miles that just stared doing this almost exactly as you describe your issue. At first it would rectify itself after a couple of minutes but now it continues until I come to a complete stop. Did you ever find an answer?
#918 of 1029 Re: Ive got issues [scat2]
Sep 09, 2011 (12:46 pm)
The sensors seem to be the first place to start. My problem has persisted and now is worse. The transmission is slipping. It's at the dealership again
#919 of 1029 My poor performance was tied to the computer.
Sep 16, 2011 (2:04 am)
So a year goes by and it is up to 90,000 miles. So I go to the shop and ask them to do an oil change and replace the transmission and the rear deferential fluids. So I get it back and I notice that it is running poorly. It will race up in RPM, then dies. During acceleration it will race before it shifts gears. While slowing down to a stop light it will die. This goes on for a week before I take it back to the shop. They take it for a test drive and yea we see what you‘re talking about, but no not sure why. So they have it for an entire day testing it. They open the transmission, no problems there, they test the accelerator switch. They check the computer, no codes, they call a transmission expert. They reset the computer to factory. I drive it for a week, it is better, but now it will not hold a steady speed on the freeway. It keeps arguing with who is in charge, fighting itself. So back to the shop for another day of testing. This goes on for several more weeks. So one day, late in the day they call me at home, they have a driver on the way over to pick me up. It is fixed. So I get to the shop and the owner greets me in the parking lot with the lead mechanic. They were real close to pulling the transmission when they decided to go back into the computer programming. They had remembered that the fuel rail had low fuel pressure when the car was off. The bad check valve on the fuel pump problem had never been replaced. They tweaked the programming to tell it that it was ok to have low fuel when the car was off. It runs great now! So the computer does not like low fuel pressure when the car is off. ! And resetting the computer will erase what it has learned about the other systems.
#920 of 1029 Re: My poor performance was tied to the computer. [fatuglyold]
Sep 16, 2011 (10:27 pm)
The hard shifting sounds like the same problem I had. No computer codes
until after a few weeks, finally I got the transmission related P7xx series
code come up and it was the TSS (transmission speed sensor or OSS
Output speed sensor) P-0722, that was causing the high rpm/hard shift problem. I had the transmission speed sensor replaced and shifting
returned back to normal. No re-programming was necessary as the PCM
relearns the shift points from your driving habits.
As far as the low fuel pressure, that will drop off over time when the
truck is sitting there overnight, but as soon as you turn the the key
on and the fuel pump relay operates, the fuel rail should be pressurized
to 45psi within one second, before starting, so that part doesn't
make any sense to me. I use a aftermarket fuel pressure guage to
check my fuel rail occasionally and it maintains pressure for a long time
with the ignition off.
#921 of 1029 2002 dodge dakota pick up.
Sep 26, 2011 (4:53 pm)
Having problem with automatic transmission. daughter starts truck up cold, goes about approx half mile.stops at traffic light, then truck start shifting only at low speed. , rpm revs up to approx 400 rpm, but will not hardly move. goes about 20 mph. this dont happen all the time. can truck transmission be tested electrically? any ideas. can regular automotive shop check this out, or do i need to take it to transmission specialist?
#922 of 1029 Re: 2002 dodge dakota pick up. [dpezfive]
Sep 26, 2011 (11:48 pm)
Do you mean rev up to 4000 rpm? At 400 rpm it is below normal idle
rpm for an automatic and it will hardly move at that rpm.
If it revs up to 4000 rpm and is only going 20mph, it appears not
to be shifting out of 1st gear.
It depends on several factors: mileage, when transmission was last serviced etc..
a 2002 is 9 years old and requires fluid/filter/adjustment service
every 3 or 4 years.
There are 3 sensors and and 3 electrical solenoids operated by the PCM
in the transmission. There is also a throttle position sensor that feeds
back information to the PCM to help it determine parameters for shift
points as well as a transmission speed sensor.
These can be scanned by a DRB scan tool which most dealers have, to see
if any faults occur. (Transmission shops may also have the DRB scan tool. )
Also, most electrical failures in the sensors, or transmission control solenoids may bring on a "check engine" light, that can be scanned by any OBDII scan tool, which most owners can afford,
or have read by someone with one of these.
Mechanically the transmission is complex, with 2 planetary gear sets and
a system of clutches (front/rear, overriding and direct) as well as
bands (front/rear) to operate these for gear shifting.
These require proper fluid pressure in the control valve body to operate
bands and servos that facilitate the shift points under control of the
So it depends on where the problem lies, when the transmission is placed
in D and the engine rpm and transmission pump fluid pressure inside
the transmission determines when gear shifting occurs
1-> 2 upshift point.....or 2->3 upshift point or 3->4 upshift point
(when the over drive unit kicks in).
Proper shifting requires proper operation of each section of the transmission
responsible for the gear change, be it an automatic upshift or downshift.
Here's a simple test. Does manual shifting from 1->2 or 2- D work?
If so that will provide a clue of which parts may be still operating and which
parts under automatic or PCM control or not.
#923 of 1029 Re: 2002 dodge dakota pick up. [carverman]
Sep 27, 2011 (3:06 am)
Thankyou for advice.mileage is 97.000.dont knoe when transmission was serviced last.bought from private owner bout 8 months ago.Brang to walts trams shop.Told me we would have to drop pan and inspect transmission for contamination. called back and said yes , their is. would cost 1.300 to replace transmission. or he could replace sensors and solenoid for 300.00 but could not guarentee it would fix problem. said could last just around the corner when driving, or could last six months.so i told him to just put it back together for 75.00. daughter could not effort it at the time. do you think i should i get 2nd opinion? Thanks again for all your help. dpezfive.
#924 of 1029 Transmission overheating
Oct 01, 2011 (7:42 am)
I have a 2006 Dakota 4.7L 4X4 with under 50,000 miles. For the Last couple of months the transmission overheat idiot light coms on intermittantly. Ther is no rhyme or reason behind it. Then the light does come on, the transmission starts shifting hard, and the engine will runn a little rough. It will only stay on for a couple of minutes, then the tranny is fine.
It will come on both with in minutes of starting or after running for a period of time.
Fluid levels have been fine. and the fluid didn't need to be changed.