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:

I noticed that mine does it with the Smarty loaded, but seems to quiet down when it isn't loaded up. Maybe it's just the nature of a Smarty? :)

I've had that problem for a while. After the transmission service it went away but came back after about 2000 miles. Currently the truck does it..and I just figured I'd correct it by giving it a little more throttle than usual. That trick didn't work. So now I'm out of my warranty and not sure if I'll try and tackle the above myself, just leave it until it's a serious problem or pay someone to do it. Knowing me I'll just forget about it again in a few days until it becomes a problem :argh: Thanks for the above info. I need to cut and paste it for future reference.:rocking:

Well there is a TSB out for it so warrenty or not they fix it for free.

As for his problem even though they have a TSB out about it being he is out of warranty they will not fix it for free. Many times they need to replace parts in the trans to fix the 1-2 shift problem, the parts are free only under warranty.

Warranty's suck! the Dealerships here in dallas suck with tranny's I had a gas truck in the shop for over a month trying to get them to warranty the tranny with only 33k miles

Y'all need to find new dealers... All the ones around here (all brands) fix stuff that has a TSB out for a PROBLEM for free as if it was under warrenty. I would call and ask.

Dealer didn't check TBS
 

Dealer said $4000 for a new transmission...told him about TBS...serviced it and change solinoid...wow what do you know...it works again...

hey that is great to hear :U::U: nothin' like helpin another diesel head out in a time of need..... and i know from experience how much of a time of need a transmission is.....

Glad to here it and...

:hi:

Stay around for a while!

I had a simular humting issue and it all but went away when i installed Suncoast VB and TC. It was allways there under light load with stock tranns. With Suncoast parts it only shows up every once and a while and when it does its hardley noticable.

Any updates on those who had success on this fix?

had mine do it a few times but i learned to just put foot in it and no hunting

Thats what i do usually, but there is a short couple streets in my neighborhood where you cant do that. That section between the speed bumps is the only place i see it on mine.

My truck's done this for a while, seems to be worse lately, maybe it's the cold weather. Very annoying. I'm gonna call the stealership and see what they say. 43k miles on my truck. Thanks for the TSB info!