48 re 1-2 gear hunt

[rlambert94]

Well, i took my truck to the dealer and it was throwing a p1740 code. It says 1740 is a tcc and/or overdrive performance solenoid. Anyways, dealer wanted way too much to pull and check it. Took it to the local aamco since my sister owns an aamco and i can get it done virtually free. Aamco tore into it and said that the whole transmission was burnt up. Going to do some enhancements on the valve body.

 

[sag2]

Oops, sorry missed the upgrades. But the front band adjustment is still very important. Sorry it sounds like more than just a band or solenoid.

 

[JJPage]

I thought I had solved the 1st to 2nd shuttle by adjusting the TV cable, actually I did, it is no longer doing that.



I have a new problem that I just noticed, I do not believe my TC is locking up, at least not in OD. I used to feel it lock about 50mph, now nothing, it shifts into OD about 45mph and just stays real smooth all the way to over 80mph, never feel the TC lock up.



Could this be the govenor solenoid? Is there also an OD solenoid? I looked at my transmission build sheet from DTT, they used my factory govenor solenoid. If I purchase one of the two kits mentioned above do you believe this will cure my problem?



Thanks in advance. Jess

 

[TCDiesel]

Yes You do have OD Solenoid, the Lockup and OD are 1 assembly and the VB must be dropped to replace them.

 

[cerberusiam]

Might not cure it but it won't hurt. The gov solenoid being off can do WEIRD things like that to the computer controls. It will cause a no OD shift, possibly it will interfere with lockup control also.



If you got a fairly tight TC you may not feel it lockup in normal driving. A lockup switch would be a quick way to verify whats going on. It will tell you if lockup solenoid and the TC is capable of working or you have another problem.

 

[JJPage]

I do not have a lock up switch, I do have written instructions on "how to" just never got around to it.



I am certain my TC is not locking in OD, it was very noticable before this all started. In fact it was on the Dyno, I waited until lock up at around 50 mph, ran it up to around 70 mph so it wouldn't downshift, and rolled into it. That was when I lit up my Brake and ABS lights in my dash and they would not go out. I checked for codes and there were none, but by clearing the codes(that were not there) using a Smarty, it extinguished the Brake and ABS lights.



Leaving the dyno event, is when the 1-2 shuttle shift at light throttle reared it's ugly head. That led to the TV cable adjustment, and you know the rest of the story.



Do I need to drop my valve body to replace the govenor solenoid? Are there any hints or advice when choosing either upgraded solenoid kit, or are they both pretty straight forward? Simply removing the old and installing the new? The OD/lockup and the Gov solenoid are two different components?

 

[cerberusiam]

The gov solenoid and transducer are easy to replace, acouple bolts. The TCC and OD solenoid are a bit different, I think you need to drop the VB and I think you can only get them as a set with the harness.



Before you do that, do the lockup switch and make sure it is not a wiring thing. Good luck.

 

[JJPage]

The gov solenoid and transducer are easy to replace, acouple bolts. The TCC and OD solenoid are a bit different, I think you need to drop the VB and I think you can only get them as a set with the harness.



Before you do that, do the lockup switch and make sure it is not a wiring thing. Good luck.

OK Thanks, I'll do the lockup switch this week. I think I have a couple different options for the switch, one uses a 10 ohm resistor, and one jumpers relays to keep from throwing codes... . I'll have to reread my notes.

 

[gordon.rhodes]

The problem is with your gov control switch in you transmission. If it is under warranty take it back to dodge and they will fix it up for you. Their is a TSB out on it. Look for the TSB and take that into dodge with you also.

 

[Matt400]

Has anyone had experience with the tsb on the 48 re 1-2 gear hunt.

I hate that symptom. . yes I have and yes I have done the TSB and yes it made no difference. A little more throttle and the problem goes away but many times its not in my driving style.



I have one of these kits setting on my tool box that I wonder if will help any, not sure but I have yet to install it. That kit is more so for the 2-3 rather than the 1-2 hunt but its the 1-2 that bugs me the most.

If one changes the at rest set point on the TTVA motor it will advance things like a TV cable adjustment.



This has worked on built transmissions so it should do the same thing on an OE unit.

please tell more. . how & where is the "at rest set point" changed?

 

[cerberusiam]

From the description I was given, you take apart the TTVA motor and index the gear that drives the TV shaft one tooth farther ahead. How much dissassembly I never got the answer on. Dave Goerend supposedly talked somebody thru this procedure so it doesn't seem to hard to do. I just never got a good answer from the individual.



I just need to get enough time to investigate the whole process. Looking at the pressures readings stock this should throw some more pressure and a faster ramp to get by that little 1-2 shuttle point that is there.



I doubt it will work on the 2-3 hunt as thats a bit different but should help the 1-2 shuffle.

 

[Matt400]

From the description I was given, you take apart the TTVA motor and index the gear that drives the TV shaft one tooth farther ahead. How much dissassembly I never got the answer on. Dave Goerend supposedly talked somebody thru this procedure so it doesn't seem to hard to do. I just never got a good answer from the individual.



I just need to get enough time to investigate the whole process. Looking at the pressures readings stock this should throw some more pressure and a faster ramp to get by that little 1-2 shuttle point that is there.

Interesting... I would be into trying that out.

That Sonnax kit I mentioned earlier comes with shims to move the TV pressure up by 7 psi, 14 psi or 21 psi. A pdf on the changes can be found here- http://www.sonnax.com/instructions/22771-HDK3-IN.pdf



I wonder if that is doing the same thing?

 

[cerberusiam]

Looks like it is doing roughly the same thing. My guess would be telling the difference between the mods, all else being equal, would be tough to do.

 

[p-Bar]

Matt where did you purchase this kit? Let us know the outcome

 

[Matt400]

Matt where did you purchase this kit? Let us know the outcome

Been awhile so am drawing a blank... I think it was a distributor in Sacramento. There is a distributor locator here: Sonnax - How to Order



I will post back on what I find, its been on the back burner with paying jobs taking precedence

 

[JJPage]

OK, been a couple of days, and I know I have taken this thread a bit off the OP's 1-2 shuttle shift, Excuse me please.



I installed my two lockup switches today, 3-4 lock and TC lock, both work excellent, so I now know both solenoids are working and my TC is holding strong. When I first went for a test drive my transmission also was back to normal (TC locking), before I ever operated the switches... ???



What I did find while splicing into #6 & #7 on the transmission plug, it (plug) was dripping with transmission fluid, inside/outside saturated. The fluid is coming from the front band adjustment locknut/stud, I cleaned this all up. Could this have been causing the irratic shifting and no TC lock?



Also, why is this leaking and how do I stop it? I am going to speak with Bill at DTT on Monday, let him know my results of the lockup switches, and also ask why my transmission "buzzes" in reverse when cold.



I'm much relieved knowing my transmission is sound... , Thank you all for your input, your advice and direction is invaluable.



I also am going to order the upgraded governor solenoid kit, will replace next time I drop the pan. One other quick note, since you can only adjust the TV cable on th 03's, 1/8" at a time, I was able to split that difference by bending the bracket that holds the cable on the transmission 1/16" forward.



Happy Easter, God Bless, Jess

 

[JJPage]

I posted this in another thread, but wanted to share it here also.



--------------------------------------------------------------------------------



Wanted to give you guys an update, I have all my new parts, governor pressure solenoid, transducer sensor, and a new APPS sensor from TMB Mechanical.



Since it is a windy day, and my truck will not fit in my garage, I decided to tackle the APPS sensor first. My GOD! What a difference, this is like a whole new truck. Shifts fantastic, I can feel the TC locking in 3rd and 4th just like when it was new, even better than I remember. Light throttle shuffle is completely gone, TC locks at 50mph in OD, I am so dang thrilled, this is almost unbelievable.



I understand I had multiple issues fighting each other, but I believe now, that this was the main culprit. I will still replace the trans components when I service it, but it is not so urgent now.



Any other 03/04 owners with an engine mounted APPS, if you are having any of the above issues, I strongly recommend an APPS sensor from Tim at TMB Mechanical, best $160. 00 I have spent in a long while. Tim is a very pleasant person to speak with, and my APPS arrived exactly the day he said it would.



I am still amazed at the difference this has made, I Love driving my truck again.



Thanks again, to all who have assisted me through this problem! Jess

 

[ColoradoKing]

Nothing like falling in love with your truck all over again! Glad it worked out.



I am researching a similar problem. The 1-2 hunt will only occur if I put the gear selector in 1 or 2 (ie I manually select the gear). It will not hunt if I leave the selector in Drive. However, a new problem has just started to happen:



The trans is not shifting properly during acceleration. It hesitates to shift up to 2nd and 3rd, and will not hold a gear or lock unit it gets to OD, where it lurches into gear and stays locked OK. Between 3rd and OD especially, if I apply any throttle it'll shift up and down continuously until I feather the throttle and let it grab and hold OD. If I put it in Tow/Haul mode, it shifts like a champ. The exhaust brake works fine with or without Tow/Haul engaged.



I considered the starting a separate thread, but since a lot of the symptoms seem similar, I'm wondering if it's a related issue (GPS or TV issue)?



Thanks to anyone who may have some advice.

 

[ColoradoKing]

Bump. Still living with the odd, erratic shift pattern. Would appreciate advice from anyone who has experienced/solved a similar problem.



Thanks in advance.

 

[TFucili]

Bump. Still living with the odd, erratic shift pattern. Would appreciate advice from anyone who has experienced/solved a similar problem.



Thanks in advance.

My friend did an ATS and had what I think was a similar issue. I rode in his truck soon after the install and the hunting was unbearable. As I recall, they ended up changing the valve body out, but I'm not positive. You might contact ATS.