| From | Message |
jpconard
Dodge Dakota
JOIN HERE
12/29/2003
14:13:40
|
 Subject: 45RFE transmission
IP: Logged
Message:
On a 2000 QC 2x4 4.7L the engine RPM is starting to change when cruising at a steady speed. Seems to happen with OD on and off. I found a very similar post from "blued" - 6/9/02 with exact same symptoms from a 99 Durango "steady speed at 60mph, RPM at 2000, then jumps to 2300 then back to 2000. The replies said it was the Governor Pressure Solenoid.
This just started this weekend when pulling light trailer (200-250 lbs., and Honda 250 ATV, 350 lbs. and a 50cc and 100cc Honda bikes in the bed). I thought it had something to do with the load, but it did it again last night with no load (only wife and kid).
Of course my extended warrantee ran out at 75,000 and it now has 76,000 miles. I have changed the transmission fluids and filters in 01, 02, and 03 and for the most part the truck is not drove hard.
Does this sound like the governor pressure solenoid? and if so, how hard is this to change and where is it? Is there also a governor pressure sensor. Is there a diagnostic code for this condition? No check engine light is currently on (or has ever been). Trans fluid is clean with no burnt smell, etc.
I have gaskets and filters for next year's fluid change so taking the pan off is not a big deal. What do these parts cost?
|
Dodge_Tech
Dodge Dakota
JOIN HERE
1/01/2004
07:49:23
| RE: 45RFE transmission
IP: Logged
Message:
TPS.
The only way to properly diagnos this is with a lab scope (a DVOM or scan tool aren't fast enough to catch the glitch, and it won't set a trouble code).
Hook up the lab scope, and watch the TPS voltage closely, odds are you'll see a quick spike (in the millisecond range) and the torque converter will unlock, or partially unlock.
This will give you a noticeable fluctuation in RPM.
Relatively common trouble with all the dodge truck V8's with autos.
Leo
|
Dodge_Tech
Dodge Dakota
JOIN HERE
1/01/2004
07:51:14
| RE: 45RFE transmission
IP: Logged
Message:
Oh, by the way, spin into your dealer and have the TCM updated..
This will magically transform your 45RFE into a 5/45RFE.. And you will have a total of 6 forward gears, and smoother shifting to boot.
Leo
|
Wogger
Dodge Dakota
JOIN HERE
1/01/2004
08:43:45
|  RE: 45RFE transmission
IP: Logged
Message:
Dodge_tech, I have a 2001 Dakota Sport with 45RFE transmission. Is there anything special that I need to request to get the upgrade performed?
Thanks again..
Dave
|
Dodge_Tech
Dodge Dakota
JOIN HERE
1/03/2004
10:04:17
| RE: 45RFE transmission
IP: Logged
Message:
Just ask 'em nice to flash the controller for you. There are a number of trans shift related TSBS that involve updating the controller, so I'd imagine that they shouldn't have a problem doing it for you.
Leo
|
jpconard
Dodge Dakota
JOIN HERE
1/06/2004
13:25:23
| RE: 45RFE transmission
IP: Logged
Message:
Dodge_Tech,
Thanks for the answer.
|
Rob C
Dodge Dakota
JOIN HERE
1/08/2004
13:46:49
|  RE: 45RFE transmission
IP: Logged
Message:
Dodge_Tech are you saying the 5/45RFE and 45RFE are essentially the same transmission but with different firmware for the TCM? I've got a 2000, if the dealer flashed the TCM would my 45RFE operate just like a 5/45RFE?
|
Tech-ee
Dodge Dakota
JOIN HERE
1/08/2004
17:33:58
|  RE: 45RFE transmission
IP: Logged
Message:
dodge tech,
I have to pull the BS flag on this one. You're trying to tell us that tha 545 rfe, has six forward gears. In succession?
In other words, from a stop, floor it, and ti wuld go thru 6 gears, 5 gear changes after 1st, without a downshift?
BS flag a waving!!!!!
|
Kowalski
Dodge Dakota
JOIN HERE
1/08/2004
18:21:38
| RE: 45RFE transmission
IP: Logged
Message:
You'd only hit 5 gears in that example. The sixth is another ratio for second gear that you catch kicking down.
|
GraphiteDak
GenIII
1/08/2004
23:37:56
| RE: 45RFE transmission
IP: Logged
Message:
I count a total of 5 forward gears during most driving.
However, pulling my trailer up a very very steep hill in the high mountains from a stop I have noticed it wind out 1st gear, wind out 2nd, then only drop maybe 1k RPM's (like from 5500 RPM's down to 4500 RPM's) which I think was the alternative 2nd gear, then shift thru 3rd, 4th, 5th, etc. Obviously this has only happened maybe twice for me.
Another thing I noticed. 3rd gear is a 1:1 ratio like most any other tranny's. Taking it out of OD manually by means of the button drops it into 3rd. Sh*ty MPG when I do this towing. I now leave it in OD unless it's a REALLY long hill and it will only shift down to 4th which gives me better MPG. It does not shift up and down like old tranny's or CHEVY's do. This new tranny seems to pick a gear and stick with it for a while which is a good thing. I have elected to rarely manually disengage the OD when towing.
|
Kowalski
Dodge Dakota
JOIN HERE
1/09/2004
15:42:27
| RE: 45RFE transmission
IP: Logged
Message:
I leave it in OD towing also with no hunting problems. Only hits fourth when I'm pulling real easy (like downhill). Doesn't seem like that should stress the tranny much, don't understand why some 4.7 guys say to turn it off ?
|
Tvesel
Dodge Dakota
JOIN HERE
1/12/2004
10:29:21
| RE: 45RFE transmission
IP: Logged
Message:
Please Help!!
My 2002 dakota slt quad 4.7 is stuck in 4-Lo and the gear indicator (on the cluster) is cycling thru from park,reverse.....to first the starts over again. The tranny isnt trying to shift its just the indicator. It will drive fine in 4lo but wont go to 4hi or 2hi. When i move the 4wd selector to 2wd, the green light on 2wd flashes and the 4lo lifht stays on orange. I tried to reset the computer (negative terminal off and hold in the start position for fifteen seconds). No fuses that I see are blown!?!?!
Any Ideas??
Thanks,Tom
|
Twix
Dodge Dakota
JOIN HERE
1/12/2004
13:19:44
| RE: 45RFE transmission
IP: Logged
Message:
Man you goys are killing me.
First off, jpconrad, If the hunting is occuring while in nutral or park also it's the TPS most likely. Dodge dealers replaced everything else until I I bought a new one and replaced it. fixed my problem then I returned everything back to the dealer and put my originals on. The TPS won't kick out a code untill it gets really bad then it will give you Multiple Injector and Multiple Spark plug faults. It will also thrash your U-Joints if you happen to try to shing during one of the surges.
Second, there are 5 forward gears inb the auto. 1 through 4 with a dual 2. The first 2 is used when upshifting from 1st to 2nd, and the other is used when shifting from 3rd back down to 2nd. This is done to reduce stress on the drivetrain while maintaing "optimal" power for your "most likely" driving condition. If you stick your truck in 2nd manually and drive down a steep long hill, you will feel the truck make the switch between the 2 seconds. The truck will coast down the hill, and when your speed gets to high, you will feel the engine begin to brake and you will slow down. It's then shifted into the 1st 2nd. When you start to go slow enough, you will suddenly feel the truck begin to speed up as it shifts into the 2nd 2nd. it will repeat this process until you run out of hill. It gets a little annoying when you're trying to use the engine and tranny to control your descent down Raton Pass in icy conditions and the truck is shifting back and forth.
|
JES
Dodge Dakota
JOIN HERE
1/12/2004
13:55:40
| RE: 45RFE transmission
IP: Logged
Message:
Kowalski -- by turning the OD off, one is giving the tranny the ability to lock the torque converter in 3rd ... thus producing less heat. By leaving the OD on and running in 3rd gear, you're creating a lot of unnecessary heat that will eventually have a negative impact on your transmission.
Now go turn that little screw on your throttle body!!!!
:oP
Eric -- http://photos.yahoo.com/jes_96
|
Kowalski
Dodge Dakota
JOIN HERE
1/12/2004
15:37:55
|  RE: 45RFE transmission
IP: Logged
Message:
Already did Jes, and as I've told you before, it worked for me, so screw you.
|
Mikey
Dodge Dakota
JOIN HERE
1/12/2004
19:27:57
| RE: 45RFE transmission
IP: Logged
Message:
I have a 2001 Dakota Quad Cab with 4.7 and auto tansmission. I am getting P0700 code after the transmission jumps and the check engine light comes on. Anyone know whats going on with it?
|
Atlantic Blue
Dodge Dakota
JOIN HERE
1/12/2004
22:20:45
| RE: 45RFE transmission
IP: Logged
Message:
P0700 - Transmission Control System (MIL Request)
What do you mean when say your transmission jumps?
|
snowman
GenIII
1/13/2004
01:38:12
| RE: 45RFE transmission
IP: Logged
Message:
hate to tell you all this but my transmission started doing the same thing on my 5.9 dakota and then this past weekend she dies all together. engine runs fine but the truck won't move.
Formerly Cadetdak
|
JES
Dodge Dakota
JOIN HERE
1/13/2004
08:48:32
| RE: 45RFE transmission
IP: Logged
Message:
JEEZ!!!! Touchy there Kowalski ... while you're under the hood there, make sure ya pull ur sense of humor outta your intake ... I'm sure it's screwing up your muffler bearings and kanutor valve. :oP
Eric
|
Kowalski
Dodge Dakota
JOIN HERE
1/13/2004
15:58:40
|  RE: 45RFE transmission
IP: Logged
Message:
Whatever you say Jes. Screw with the bull, you get the horns ! So what did you end up doing about the rough idle ?
|
JES
Dodge Dakota
JOIN HERE
1/13/2004
17:08:21
| RE: 45RFE transmission
IP: Logged
Message:
I hear ya Kowalski. I've had my share of horns. :oP After bitching incessantly to the dealer, corporate, etc., the dealer ended up driving the truck for a couple days, acknowledging the crazy low rough idle and opted to replace the complete throttle body w/ IAT, TPS, linkage, et cetera, as opposed to trying to figure out what was causing the rough idle condition. Has run beautifully since (about 4,100 miles over two months or so). I remember once that the idle jumped around a bit, but that was when I was trying to position my trailer just right off the end of the porch so as to move the hot tub ... R ... D .. R .. D ... R .. D .. it's a wonder the idle went nuts that time. Other than that, it's been perfect. So, in short, it was something in the complete TB assembly that fixed the prob. Who knows!!! As long as it's fixed. Take care. Just wish it wasn't such a pain in the ass for Dodge to fix!!!! UGH.
Eric -- http://photos.yahoo.com/jes_96
|
| | P 1 Next Page>> |
