Tranny Stuck in Limp Mode
07-25-2013, 09:47 PM
#1
Registered User
Thread Starter
Join Date: Jun 2004
Location: Rome, Georgia
Posts: 31
Likes: 0
Received 0 Likes
on
0 Posts
Tranny Stuck in Limp Mode
Help!
My Transmission 47RE is stuck in Limp Mode, '99 2500, I've replaced the governor soleniod, and the transducer, and the wiring plugin-in deal in the transmission, I have a dtt valve body, replaced the sensor on the trans, and the speed sensor, It was blowing fuses, (10 amp) under the hood, now its not? Have unhooked the battery cables in between all of these changes. But it is still in limp mode (no 1st, no overdrive) I can get the truck to go into first gear if I put it in neutral and pull it straight down to 1st, then manually shift up and it changes fine, just no overdrive, other than that its just 2nd and 3rd?
Don't know what to do from here, any advice would be greatly appreciated.
Thanks,
My Transmission 47RE is stuck in Limp Mode, '99 2500, I've replaced the governor soleniod, and the transducer, and the wiring plugin-in deal in the transmission, I have a dtt valve body, replaced the sensor on the trans, and the speed sensor, It was blowing fuses, (10 amp) under the hood, now its not? Have unhooked the battery cables in between all of these changes. But it is still in limp mode (no 1st, no overdrive) I can get the truck to go into first gear if I put it in neutral and pull it straight down to 1st, then manually shift up and it changes fine, just no overdrive, other than that its just 2nd and 3rd?
Don't know what to do from here, any advice would be greatly appreciated.
Thanks,
07-26-2013, 07:18 AM
#2
Registered User
I had this trouble with mine and it turned out to be a broken wire in the harness going to the transmission. I can't say which wire as it was found and fixed by a transmission shop. LOL
Sam
Sam
07-28-2013, 08:16 PM
#3
Registered User
Thread Starter
Join Date: Jun 2004
Location: Rome, Georgia
Posts: 31
Likes: 0
Received 0 Likes
on
0 Posts
Update to Tranny in Limp Mode
Code PO748
Ok, We've pulled the wiring harness to the transmission and all the wires checked out ok, from the trans to the pcm and relay box. The DTT voltage regulator is set on 4.7. replaced governor solenoid and sensor and wiring harness with o/d solenoid. Also replaced crankshaft position sensor as I read in a RE diagnostic that it could cause the problem, replaced trans speed sensor and rear speed sensor. Originally, before we replaced all these parts, the 10 amp trans fuse was blowing, now it's not. The relays all work fine. Although the asd relay clicks off and we lose the 12amp on one side of the trans relay. Have not replaced the PCM, hate to drop the money for no results again.
Any 47RE experts opinion would be greatly appreciated as it is
still in LIMP MODE.
Thanks.
Ok, We've pulled the wiring harness to the transmission and all the wires checked out ok, from the trans to the pcm and relay box. The DTT voltage regulator is set on 4.7. replaced governor solenoid and sensor and wiring harness with o/d solenoid. Also replaced crankshaft position sensor as I read in a RE diagnostic that it could cause the problem, replaced trans speed sensor and rear speed sensor. Originally, before we replaced all these parts, the 10 amp trans fuse was blowing, now it's not. The relays all work fine. Although the asd relay clicks off and we lose the 12amp on one side of the trans relay. Have not replaced the PCM, hate to drop the money for no results again.
Any 47RE experts opinion would be greatly appreciated as it is
still in LIMP MODE.
Thanks.
07-30-2013, 08:27 PM
#4
Registered User
Thread Starter
Join Date: Jun 2004
Location: Rome, Georgia
Posts: 31
Likes: 0
Received 0 Likes
on
0 Posts
Anyone think I should replace the PCM
Hey,
I'm assuming I'm one of the few people this has happened to here, Anyone think it could be the PCM, or does anyone know how to check the PCM and see if it's bad or not.
I'm assuming I'm one of the few people this has happened to here, Anyone think it could be the PCM, or does anyone know how to check the PCM and see if it's bad or not.
08-23-2013, 06:26 PM
#5
Registered User
Thread Starter
Join Date: Jun 2004
Location: Rome, Georgia
Posts: 31
Likes: 0
Received 0 Likes
on
0 Posts
Limp Mode Fixed
After exausting every thing else, I finally took it to the dodge place to get the PCM checked, bad PCM, replaced and now shifts better than before.
Thread
Thread Starter
Forum
Replies
Last Post
dodgeman01
3rd Gen Engine and Drivetrain -> 2003-2007
10
10-08-2013 09:02 PM
55_Cans
3rd Gen Engine and Drivetrain -> 2003-2007
3
09-02-2012 02:27 PM