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  #1  
Old 09-22-2013, 07:05 PM
KScott KScott is offline
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Default Front drive shaft falls off locking brakes

We own a 2009 Dodge Ram 2500 4 wheel drive Diesel--and the weirdest thing happened today that could have been very serious--had it happened on the freeway.

Coming off of the freeway onto an on-ramp--the brakes completely locked up--(not towing anything). We came to a stop--shredding about 40 feet of rubber behind us.

It felt like the under carriage had fallen off. Anyway looking underneath the truck--the front drive shaft that attaches to the transmission was just hanging loose there. Somehow it just broke free of the transmission.

Being far from home we had to call a tow truck--and then actually catch a plane back to home--then rent a car to get home--and will have to fly back to pick the truck up once fixed.

To be honest--I didn't think a drive shaft could just fall off. Has this happened to anyone else with this truck. We have owned Dodge Rams--in the past and have never had any problems with them.

All replies greatly appreciated.

Last edited by KScott; 09-22-2013 at 07:55 PM.
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Old 09-22-2013, 09:22 PM
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Sounds like a front diff issue. If the diff seized or grenaded then you're looking at instant stoppage of the front wheels and since the front driveshaft is in constant spin, when it locked up it would have sheared the bolts holding it to the transfer case. That's my theory at least.
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Old 09-22-2013, 10:57 PM
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^^^Good Theory^^^ I'd have to go with that too.
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Old 09-23-2013, 12:48 AM
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Quote:
Originally Posted by CdnoilRAM View Post
Sounds like a front diff issue. If the diff seized or grenaded then you're looking at instant stoppage of the front wheels and since the front driveshaft is in constant spin, when it locked up it would have sheared the bolts holding it to the transfer case. That's my theory at least.
Thanks for your reply--I was beginning to think it might have been someone trying to steal the transmission or drive shaft--unscrewed the bolts that held it together and got scared off before they could remove it? I had a problem last year--when I parked in a parking lot--and someone decided to take off with the Catalytic converter.
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Old 09-23-2013, 01:08 AM
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Quote:
Originally Posted by CdnoilRAM View Post
Sounds like a front diff issue. If the diff seized or grenaded then you're looking at instant stoppage of the front wheels and since the front driveshaft is in constant spin, when it locked up it would have sheared the bolts holding it to the transfer case. That's my theory at least.
I don't agree, if the diff locked up the Driveshaft would have stopped instantly without any damage since there is next to no inertia with the little bit that is turning in the t-case.
what does the t-case look like? it the case cracked? where did the driveshaft disconnect from exactly? at the flange, did one of the joints in the the cardan joint fail?
my bet is the joint in the driveshaft@ the t-case failed and allowed the driveshaft to be jammed somewhere between the trans, frame, t-case thus locking up the frontend. I bet there is also ALOT of collateral damage to the t/case, transmission and frame/wiring/fluid lines!
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Old 09-23-2013, 08:53 PM
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Another good theory ^^

Without seeing what it looks like under there it's all pure conjecture though.
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Old 09-24-2013, 12:03 AM
KScott KScott is offline
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Quote:
Originally Posted by scrappy View Post
I don't agree, if the diff locked up the Driveshaft would have stopped instantly without any damage since there is next to no inertia with the little bit that is turning in the t-case.
what does the t-case look like? it the case cracked? where did the driveshaft disconnect from exactly? at the flange, did one of the joints in the the cardan joint fail?
my bet is the joint in the driveshaft@ the t-case failed and allowed the driveshaft to be jammed somewhere between the trans, frame, t-case thus locking up the frontend. I bet there is also ALOT of collateral damage to the t/case, transmission and frame/wiring/fluid lines!
There's definitely a lot of damage. We haven't heard back yet from the Dodge dealer it was towed too--but it's a mess. We've just never seen anything like it--and are real curious how it happened in the first place.

I'll post back when we hear from the mechanic.
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Old 09-25-2013, 01:31 PM
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Quote:
Originally Posted by scrappy View Post
I don't agree, if the diff locked up the Driveshaft would have stopped instantly without any damage since there is next to no inertia with the little bit that is turning in the t-case.
what does the t-case look like? it the case cracked? where did the driveshaft disconnect from exactly? at the flange, did one of the joints in the the cardan joint fail?
my bet is the joint in the driveshaft@ the t-case failed and allowed the driveshaft to be jammed somewhere between the trans, frame, t-case thus locking up the frontend. I bet there is also ALOT of collateral damage to the t/case, transmission and frame/wiring/fluid lines!
According to the tow truck driver--who stated he is also a Dodge mechanic--that when another Dodge dealer replaced the front boot on the drive shaft--in which they removed the front portion of the drive shaft--that the Dodge mechanic --"did not put the pin back in the right place"??-and that was the cause of it jamming up and then coming apart?

How does that happen? It seems to me that if the pin was not put back in the right place--that the transmission would not be able to engage, and that they would have to re-install it correctly before the truck could move?

Last edited by KScott; 09-25-2013 at 01:55 PM.
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Old 09-27-2013, 02:15 AM
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Quote:
Originally Posted by KScott View Post
According to the tow truck driver--who stated he is also a Dodge mechanic--that when another Dodge dealer replaced the front boot on the drive shaft--in which they removed the front portion of the drive shaft--that the Dodge mechanic --"did not put the pin back in the right place"??-and that was the cause of it jamming up and then coming apart?

How does that happen? It seems to me that if the pin was not put back in the right place--that the transmission would not be able to engage, and that they would have to re-install it correctly before the truck could move?
what pin? I don't know of any "pin" in the front driveshaft.
The truck WILL move and drive without the front driveshaft. it only receives power while in 4wd even though it turns all the time.
It is possible they took the driveshaft all the way out(unbolted it at BOTH flanges) to replace the boot and forgot to tighten the bolts in one of the flanges (the Tcase I would bet). how long since the dealer worked on it? was there any vibration just prior to the failure?
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