Hunting For Gears Under Light Throttle... 1-2 Shift
 

Had some issues with the truck not knowing what gear it wanted to be in. Took it to the dealership and there is a TSB to replace a solinoid in the tranny for this issue... here it is!

TSB #21-009-07


SUBJECT:
48RE Transmission - 1-2 Shift Hunt At Light Throttle
OVERVIEW:
This bulletin involves the replacement of the governor pressure solenoid valve in the
transmission valve body.
MODELS:
2004 - 2007 (DR/DH/D1) Ram Truck (2500/3500)
SYMPTOM/CONDITION:
The customer may experience a 1-2 shift transmission hunt during light throttle application.
This condition may be due to a governor pressure solenoid valve.
DIAGNOSIS:
If the customer experiences the above condition perform the Repair Procedure.
PARTS REQUIRED:
Qty. Part No. Description
1 04617210 Valve, Governor Pressure Solenoid
4 05013457AA ATF+4 Automatic Transmission Fluid
AR 02464324AC Gasket, Transmission Oil Pan (Note: Original pan
gasket is reusable and should not require
replacement).
REPAIR PROCEDURE:
1. Raise the vehicle on a suitable lift. Turn the ignition switch to the “OFF” position.
Remove the ignition key from the ignition switch.
2. Remove the transmission fluid (oil) pan and pan gasket. Clean and save the pan
gasket for later use during reassembly.
3. Disengage the wire connector to the governor pressure solenoid valve (Fig. 1).
4. Remove the screws used to secure the governor pressure solenoid valve retainer to
the transmission valve body.
5. Remove the old governor pressure solenoid valve from the transmission valve body.
6. Clean the transmission housing and oil pan gasket surfaces.
7. Lubricate the o-rings on the new governor pressure solenoid valve.
8. Align the governor pressure solenoid valve to the bore in the valve body.
9. Install the governor pressure solenoid valve to the valve body.
NUMBER: 21-009-07
GROUP: Transmission
DATE: May 24, 2007
10. Install the governor pressure solenoid valve retainer and attaching screws to the valve
body.
11. Connect the wire connector to the governor pressure solenoid valve.
12. Install the transmission fluid (oil) pan and pan gasket (saved earlier) to the
transmission. Tighten attaching bolts to 13.6 Nm (125 in. lbs.).
Fig. 1 Governor Solenoid And Pressure Sensor
1 - GOVERNOR PRESSURE SENSOR
2 - GOVERNOR PRESSURE SOLENOID VALVE
3 - ELECTRONIC GOVERNOR
13. Lower vehicle.
14. Add automatic transmission fluid to the transmission.
15. Verify correct transmission fluid level.
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation No: Description Amount
21-96-05-90 Valve, Transmission Governor
Pressure Solenoid - Replace (B)
0.7 Hrs.
FAILURE CODE:
ZZ Service Action
21-009-07 -2-

Did it work?

Worked Great... There was talks on other boards about a flash fix for this issue that when you re-loaded a programer it takes out the flash and you have the issue again. I had no problems though and like I said they replaced hard parts in mine.

My 07 does that once and awhile. I thought maybe it hap pended more at low speeds, you know around town, shift up then down then up again relatively quickly.

Take it in!
:U:

took mine in right before Christmas, changed the solenoids and filter. worked for about 2000 miles and now doing it again.

My 04.5 used to do that but I installed the Rokktech sensor and the hunting went away. I didn't know there was a TSB for it.

i took mine in to get the tsb done and they pulled up the warranty sheet for the stuff that has already been done on mine and the solenoid has already been changed. There was a bad tranny leak right after I bought the truck and that was what they changed. It has still shifted like crap since I got it. No change. Guess I just gotta do a shift kit and torque converter and keep trying stuff.

I reloaded my Smarty afterwards, didn't notice. Took it off a couple days later, had the hunting problem again.

Changed the celanoid in mine and the 1-2 hunt went away....:U: