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Transfer Case Problems

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Old 10-23-2007, 05:13 PM
04 SXT 04 SXT is offline
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Default Transfer Case Problems

Alright guys my girlfriend has a 99 ram 2500 cummins turbo diesel. We have been having problems with it ever since she got it. The truck has a 4 inch skyjacker suspension lift on it and everytime the front drive shaft is in the truck it vibrates really bad at about 70 mph. After driving the truck to school at the start of this year the transfer case was leaking fluid really bad. So the mechanic she worked for came down tore the transfer case apart and said the actuator was bad, and removed the front drive shaft and resealed the case told us to drive it til he could fix it right. Well this weekend we went back up there and needed to tow a trailor and needed 4 wheel drive so he put it back in after rebuilding it and rebalancing it. Well it still was vibrating like hell at 70 mph and it leaked fluid all over the bottom side of the truck. When the truck is in 4 wheel drive the 4 wheel drive works but when you put it in 2 wheel drive it is in 2 wheel drive so I am confussed on what to do and how to fix this so she can drive it home again over 5 hours away. I have good mechanical ability I have never done any work on trucks I mainly deal with classic cars so 4 wheel drive systems is not my thing so I am looking for some info...
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  #2  
Old 10-23-2007, 05:19 PM
Drew Drew is offline
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Default RE: Transfer Case Problems

just so I have this right. . .it only vibrates when the front drive shaft is in???


sounds likea u-jointis binding up.
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  #3  
Old 10-23-2007, 05:35 PM
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FroneDaddy FroneDaddy is offline
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Default RE: Transfer Case Problems

I say spend a couple of bucks and replace the u joints, then see what happens.
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Old 10-23-2007, 11:31 PM
Dallas192 Dallas192 is offline
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Default RE: Transfer Case Problems

since the truck has a lift kit in it, is the transfer case lower to compensate for the driveshaft angle?.....Dallas
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Old 10-23-2007, 11:36 PM
SilverSmoker SilverSmoker is offline
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Default RE: Transfer Case Problems

With a 4" lift the driveshaft angle shouldnt be that big of an issue. If the angle is to steep you are gonna have to clock the t-case, they have adapters to do so. I would check the u-joints would be the easiest and cheapest fix!
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Old 10-25-2007, 02:19 PM
04 SXT 04 SXT is offline
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Default RE: Transfer Case Problems

ALright the transfer case is in the stock position, and it only vibrates and leaks with the driveshaft in.. As far as I am told the U- Joints are brand new. He keeps saying that the actuator is bad from the 4 wheel drive system.. So I am not sure also should the front drive shaft turn in 2 wheel drive?
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Old 10-25-2007, 02:25 PM
Drew Drew is offline
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Default RE: Transfer Case Problems

yes, the front shaft will turn since we have a live front axel.
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Old 10-26-2007, 09:17 PM
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Default RE: Transfer Case Problems

Did you ever figure out what the problem was with the vibration?
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Old 10-26-2007, 11:54 PM
04 SXT 04 SXT is offline
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Default RE: Transfer Case Problems

No not yet haven't had a chance to look at it yet we are away at college right now and its been raining and all I have is a parking lot to work in. But I am hopping to figure it out next weekend when we go back to my house it won't be much better there though cause it still won't fit in the garage cause of the stacks, but i will have a lot more tools. I really need to figure it out before she drives 5 hours back to jersey for thanksgiving... What does this actuator do that her boss says is bad?
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Old 10-27-2007, 12:21 AM
swilsone swilsone is offline
 
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Default RE: Transfer Case Problems

Where did the transfer case start leaking? There are 3 cases to my transfer case: front, mid and rear. Mine has the same problem with the vibration...haven't been able to pin-point the real issue yet. I've had the front driveshaft rebuilt and balanced 3 times by two different shops and the truck still vibrates.
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Old 10-27-2007, 12:39 AM
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Default RE: Transfer Case Problems

The long and short of it:
I originally had an issue with the front driveshaft u-joints being worn out(ticking noise tipped me off and when I crawled under found alot of slop in the u-joint)...so I pulled it and had the driveshaft rebuilt completely(while the front driveshaft was out I noticed there wasn't a noticeable vibration) and put it back in. Took it backthe next day because the vibration was easily noticeable at 70-75 mph. He balanced it again and gave it back. Took it off and had another different shop balance AND straighten it within 0.005" @ 3600 rpm. Still vibrated at 70-75 mph. Drove from Denver, CO to West Palm Beach, FL like that. About 3 weeks later, found my transfer case leaking between the mid and rear cases. Took it to a great tranny shop and they only found the silicone seal failed; resealed it, rebuilt and balanced the rear shaft just to make sure the driveline was true...still vibrates.

The tranny place suggested I talk to a tire shop they work with...the tire shop noticed the track bar and drag link had play in them that was scuffing the tires very badly and making flat spots that were making the truck bounce. They rotated the tires and suggested I replace the track bar, drag link and seriously consider new tires AFTER I fix the steering. As I drove away with the tires rotated I noticed the vibration was still at the same speed but had moved more to the back of the truck so I'm convinced the tires are trashed. I'm shopping around right now for a track bar upgrade that won't wear out in 5k miles. Sorry this is so long.
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  #12  
Old 10-27-2007, 12:48 AM
swilsone swilsone is offline
 
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Default RE: Transfer Case Problems

The only actuator that I can think of would be some sort of wheel lock actuator...like on auto locking hubs. See, our trucks are locked at the hubs to the front axle-train meaning there is no freespin to the front differential. Some trucks have manual locking hubs and others have auto locking hubs...I would imagine auto locking hubs would have an actuator of some sort to lock the hub to the axle. When you shift the transfer case from 4 to 2 wheel drive it disengages the gear that "drives" the front diffand allowsthe front drivelineto freespin. If you jacked the front of the truck up in 2 wheel drive, the tires and front driveshaft would spin.
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Old 10-27-2007, 12:53 AM
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Default RE: Transfer Case Problems

Tell ya what you could do with the truck parked or on the ground...run your hands around the tires and feel for flat spots...the flat spots on my tires are pretty obvious.
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Old 10-27-2007, 11:20 AM
KillerCummins KillerCummins is offline
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Default RE: Transfer Case Problems

I had the same kind of vibration at 55mph when I lifted my truck. Vibrated with the front shaft on, smooth with it off. I installed the transmission drop bracket, no more vibration. When I bought the lift from Top Gun Customz, they told me that the bracket was a paper weight and that I should just disguard it. Boy am I glad I didn't listen. That was my problem, and it sounds kinda similar to yours. I dont know if they sell transmission drop brackets for the 2nd gens,but I do know that Sky Jacker used to sell a tranfercase indexing ring with some of their lifts.
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Old 10-27-2007, 11:20 AM
 
 
 
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