HELP! 2007 Dodge 2500 4low works, but no 4hi

[kenmac]

Mine is manual shift into 4wd. I have heard that some have had problems with the small motor that shifts the transfer case into 4wd

 

[Dmace]

I would look into that. I though that era of Dodge had 10/100,000 mile powertrain warranty.

My 03 had a 6/60,000 mile I think and I got a tranny replace at nearly 40,000 miles.

Where is Dmace when we need him?

Chris

Did I see the bat symbol in the sky?
The 2007 model year RAM's only had a 3yr/36k mile basic and powertrain warranty with a 5yr/100k rust warranty. 2008 was when they started the "Lifetime Drivetrain Warranty" which is unlimited years and unlimited mileage but excludes diesel.

 

[Soundguy]

if the xfer case makes a shifting noise but no shift occurs.. now I'm think fork issue... darn..

soundguy

 

[Bama67]

if the xfer case makes a shifting noise but no shift occurs.. now I'm think fork issue... darn..

soundguy

That's what I am thinking too

I don't think I am going to have time to work on it before I head back out to the rig, I leave on Tuesday. At least that will give me plenty of time to research it and dig in when I get home.

 

[Diamondpilot]

That's what I am thinking too

I don't think I am going to have time to work on it before I head back out to the rig, I leave on Tuesday. At least that will give me plenty of time to research it and dig in when I get home.

I had a transfer case fail on my first truck, a 89 Chevy. It was the shift fork that broke. Like I said before my neighbor had one fail in his 96 Dodge and it was the shift fork also. Seems like a common thing. Transfer case are fairly simple and not much to go wrong. You should also check the adjustment of any linkages.

Just be luck yours failed as it has. Mine seized the t-case up and ended up nearly ripping itself from the chassis and twisted the drive shaft right in half. My neighbors failed 100 miles from home and left him stranded till I went to rescue him with my truck and trailer.

Chris

 

[crashz]

I'm going against the crowd today and say its not internal to the transfer case. If it was a shift fork, you would not be able to get the front axle to engage in 4 Low either. It may even hang up between gears, or in neutral (had that happen to me on an older one).

I'm not sure about this but I believe GM and Dodge both use New Process transfer cases. My experience with the Autotrack NP241 in my GM was an education. Lets say the root problem was home mechanic (me) error, that led to many failed repairs by proffessional mechanics, and a final solution performed by the said home mechanic (me, again).

A failed encoder motor that shifts the case, will partially work and make some whirring and banging to prove it. And for some reason, 4 Lo in the rotation is easier to manipulate than 4 Hi. With a failed motor, I could get 4 Lo to work, and no 4 Hi or Auto (Exclusive to GM, and fairly worthless unless the wife is driving).

The clue to this the indicator light, controled by the TCCM (TransferCase Control Module). I bet the indicator lights up for 2wd and 4 Lo, but not 4Hi.

My $2 bet is on the encoder motor. Easy repair, but the part is a bit spendy.

 

[Diamondpilot]

I'm going against the crowd today and say its not internal to the transfer case. If it was a shift fork, you would not be able to get the front axle to engage in 4 Low either. It may even hang up between gears, or in neutral (had that happen to me on an older one).

I'm not sure about this but I believe GM and Dodge both use New Process transfer cases. My experience with the Autotrack NP241 in my GM was an education. Lets say the root problem was home mechanic (me) error, that led to many failed repairs by proffessional mechanics, and a final solution performed by the said home mechanic (me, again).

A failed encoder motor that shifts the case, will partially work and make some whirring and banging to prove it. And for some reason, 4 Lo in the rotation is easier to manipulate than 4 Hi. With a failed motor, I could get 4 Lo to work, and no 4 Hi or Auto (Exclusive to GM, and fairly worthless unless the wife is driving).

The clue to this the indicator light, controled by the TCCM (TransferCase Control Module). I bet the indicator lights up for 2wd and 4 Lo, but not 4Hi.

My $2 bet is on the encoder motor. Easy repair, but the part is a bit spendy.

This is kinda what I though early on when I said shift solenoid. From my understanding it moves the shift fork. I was hoping to get him to look at the fork and its associated linkages to get to a bad shift motor/solenoid.

I think at the end of the day everyone who has chimed in here is on the right track. Your answer from personal experience is the most accurate.

Chris

 

[Dmace]

I would certainly check the electrical connections and motors first. I highly doubt a shift fork is bent on a vehicle that new unless it was really mis-treated. As mentioned, test the transfer case motor.

Here's a nice trouble-shooting guide on testing the transfer case:
c1405 on a dodge ram 2500 how do i check if the t-case motor - JustAnswer

 

[Soundguy]

at this point I think all the 'probable' answers are on the table.. with only observation and disassembly being needed to validat eone of them.

can't wait to hear what is found.

motor / solenoid sounds liek the easiest.. fork might have damaged something else if it broke.

soundguy

 

[Bama67]

Thanks for all the responses guys, I really hope it is an electrical issue. I really appreciate the link to check the motor as well, I will def do that. I have been on an oil rig for about a week now, and have two more to go. But I will get this figured out when I get home and report back on the cause.