Here I am

Engine/Transmission (1994 - 1998) Front Axle Engagment/4WD Light Issues

Attention: TDR Forum Junkies
To the point: Click this link and check out the Front Page News story(ies) where we are tracking the introduction of the 2025 Ram HD trucks.

Thanks, TDR Staff
Status
Not open for further replies.
I was out driving today when I decided to use 4wd. The bad part is the front axle didn't engage, nor did the dash light come on. Tried 4Lo, transfer case is working because of torque multiplication and you can tell it's mechanically working when you shift it. So I came home and checked out the 4-line vacuum connector on top of the transfer case. It seemed to be sitting a little too high than I thought it should. I took it off and checked to make sure it was hooked up right. It seemed to be cause one of the notches was on the back side and one was on the right side, and they were lining up with the rubber connector. I tried putting it on each way and it seemed the way I had it was right. So I put it back on and still wasn't satisfied with the way it fit on the transfer case end.



I took the truck out for a drive then and found it that the 4wd was working correctly then. Did a little driving and took it out to the highway. On the way to the highway I noticed the 4wd light didn't go out right away, but was out by the time I got to the highway. :confused: Did a 15 PSI 4wd launch and I took the t-case out of 4Hi after I got going. Seemed to work good but smoked the tires good as well. ??? That got me curious so I found a slippery spot at the next intersection and tried spinning the tires. Sure enough, spun the back end around in the snow when turning around. Drove back to where I did the launch to see 6 tire marks, but the rear ones definately noticeabily longer and darker than the front two which were light and about a foot long. :confused: Should get a pic of this! :-laf



What i'm wondering is has anyone heard of a fitment problem with that rubber 4-line connector on top of the X-case? It sure didn't look fully seated. I've read about using zip-ties on connections but not sure about this connection. Could tape or something work? Anyone have a clue if I even found what was wrong? Right after I did the trans rebuild I had front axle engagement and 4wd light problems as well. Forgot exactly what they were, but they went away by themselves. Can anyone come to any conclusions for me on this fault?
 
I have had the shaft on the vacumn pod for the front axle bend before under high torque in 4wd. Also i have found water in the pod due to snow build up on the x member around the vacumn lines. Hope you find the problem.
 
TMaas said:
What i'm wondering is has anyone heard of a fitment problem with that rubber 4-line connector on top of the X-case?



Sorry for the stupid and probably obvious question, but what are those vacuum lines for on top of the t-case? When I took my t-case out this weekend, I just couldn't figure out what the four connector line was for nor the larger single connector right next to it? Do they assist with the 4x4 engagement?



Thanks, Joe
 
JGheen said:
Sorry for the stupid and probably obvious question, but what are those vacuum lines for on top of the t-case? When I took my t-case out this weekend, I just couldn't figure out what the four connector line was for nor the larger single connector right next to it? Do they assist with the 4x4 engagement?



Thanks, Joe

The single line is the transfer case vent, the four line connector is for the center axle disconnect on the front axle, the four lines are vacuum supply, disengage, engage, and vent.



Jared
 
Thanks for posting that Jared!



Found your message about an hour ago Joe and was having difficulty finding the exact functions for each line that Jared gave us.



I was told by a Tech today to try some RTV silicone, or "The Right Stuff" by Permatex. I read somewhere on this site about using zip-ties, but I don't know if that was for the 4-line connector or something else. I'm going to give the silicone a try, hopefully tomorrow, and see if that works.



Kind of a rough day today. Had a little coincidence sort of thing going on with this subject and my truck, maybe just bad luck. Went out for a drive during break and was going to turn around at an intersection on a gravel road. Turn off the highway a bit and then turn back towards the highway to see if anyone is coming. All clear so I let off the brake and ease into the accelerator, going up a slight incline on slick, hard-packed snow. Tires just spin and truck starts backing down the slight incline. Quick bracked it, backed up a little, tried it again. Tires just spin when you put the shifter into drive. Too much torque, not enough weight. So I tried that a few times and ended up trying to put stuff in front of the rear tires to grab onto, which the tires just slung back or spun behind the object. Of course their was a 20+ mph wind coming from the south-southwest and i'm facing the southwest. Tried using 4wd knowing that it probably wouldn't work, and I was right. :) So I just kept on going forward and back, getting rid of some of the packed snow and making more gravel come through the ground, also trying to build momentum. Finally I got more parallel with the road and was getting closer to getting the front wheels on the tar. Then I could have just backed up down the road and drove off fine. Finally when I thought I was going to get enough momentum, I see the farmer nearby the site coming down the road with his half-ton. He offered to hook up to me, asking if I had a chain (which I didn't know where it was since I tried using it to get the tires to bite). He of course told me to hook the one end on my truck so he wasn't liable (I told him I fully understood), and I hooked it around the tie bar (which is nothing new with this truck). He of course was on tar and idled me up to the tar. But I was disgusted, and thought that was pretty pathetic that I couldn't get up that slight incline on a gravel road to the tar road. That's the second time i've been pulled, been pulled from both ends, and both times were by a Chevy (which of course doesn't mean anything ;)). The first time I was nosed into a decline off of a icy, snow-covered gravel side street and the guy pulled me with his truck on his cement landing to his garage. This time I was backed into a rough situation. If I had 4WD and maybe some weight in the back, I would have tackled the ditch in reverse. :D But of course I didn't, hence the subject. ;) Now the money I could have spent on weight for the back end, or a tonneau cover for free weight security in the back end, was spent with the Mac guy today on a new 1/2" Cordless Impact and a 24oz Ball Pein Dead Blow. I was debating on the $5500 Macsimizer top and bottom chest, but another guy got it. :rolleyes: :-laf
 
jrobinson2 said:
The single line is the transfer case vent, the four line connector is for the center axle disconnect on the front axle, the four lines are vacuum supply, disengage, engage, and vent.



Jared

Great! I am running the 4x4 Posi-Lok, so no more vacuum actuated CAD and that means no more lines running up to the top of the T-case, of course except for the case vent line.

Just have to follow the four line connector back and plug it up as well as find some nice caps to plug up the connector on the case.

Sure is gonna be nice to have less lines up there, looks a lot cleaner. :D Oo.



Thanks Jared!



Joe
 
Status
Not open for further replies.
Back
Top