Transfer Case broke....Replacing with Atlas
#11
JK Jedi Master
They are stating to fail because most of the after market shafts dont reuse the factory dust covers or present a new one, therefore dirt is getting into the bearing and causing failure.
I have both front and rear after market shafts from two different companies and both did NOT come with replcement dust covers. I could not reuse the factory ones becuase they didnt fit. So it is just a matter of time before mine goes.
We are just starting to see the begining of a new problem that was overlooked with the instalation of after market driveshafts. Poor design from the aftermarket driveshaft makers becuase they wanted to get their product out on the street before the other guy.
I have both front and rear after market shafts from two different companies and both did NOT come with replcement dust covers. I could not reuse the factory ones becuase they didnt fit. So it is just a matter of time before mine goes.
We are just starting to see the begining of a new problem that was overlooked with the instalation of after market driveshafts. Poor design from the aftermarket driveshaft makers becuase they wanted to get their product out on the street before the other guy.
The pictures of the failed ones show a seal still on the shaft.
Any chance you could take a picture and post it? That would be a probable cause for sure.
Last edited by ronjenx; 01-10-2010 at 08:44 AM.
#12
JK Jedi Master
Join Date: Oct 2006
Location: O HI 4 Lo
Posts: 15,133
Likes: 0
Received 0 Likes
on
0 Posts
i agree, people are grabbing at straws without really knowing th cause
#13
JK Jedi Master
#14
JK Jedi Master
Join Date: Oct 2006
Location: O HI 4 Lo
Posts: 15,133
Likes: 0
Received 0 Likes
on
0 Posts
kinda like the front axles breaking, theres only been a couple
#15
JK-Forum Founder
Join Date: Jul 2006
Location: Laguna Niguel, CA
Posts: 36,534
Likes: 0
Received 16 Likes
on
15 Posts
They are stating to fail because most of the after market shafts dont reuse the factory dust covers or present a new one, therefore dirt is getting into the bearing and causing failure.
I have both front and rear after market shafts from two different companies and both did NOT come with replcement dust covers. I could not reuse the factory ones becuase they didnt fit. So it is just a matter of time before mine goes.
We are just starting to see the begining of a new problem that was overlooked with the instalation of after market driveshafts. Poor design from the aftermarket driveshaft makers becuase they wanted to get their product out on the street before the other guy.
I have both front and rear after market shafts from two different companies and both did NOT come with replcement dust covers. I could not reuse the factory ones becuase they didnt fit. So it is just a matter of time before mine goes.
We are just starting to see the begining of a new problem that was overlooked with the instalation of after market driveshafts. Poor design from the aftermarket driveshaft makers becuase they wanted to get their product out on the street before the other guy.
so that it's clear, i have personally witnessed a t-case blow up and i got to examine the bearings after the fact - THEY WERE NOT SEIZED UP. i have also personally had a t-case start to crack and again, there was no sign of bearing failure. in every case that i have seen, t-case failuer has only been on JK's with aftermarket drive shafts and from what i can recall, all were running 5.13 gears. i should also point out that of the t-case i saw blow and on mine personally, the JK's in question were both suffering slight driveline vibrations at high speeds. if anything, the evidence point to this vibration being the cause of t-case failure.
Last edited by wayoflife; 01-10-2010 at 09:58 AM.
#16
JK Jedi Master
so that it's clear, i have personally witnessed a t-case blow up and i got to examine the bearings after the fact - THEY WERE NOT SEIZED UP. i have also personally had a t-case start to crack and again, there was no sign of bearing failure. in every case that i have seen, t-case failuer has only been on JK's with aftermarket drive shafts and from what i can recall, all were running 5.13 gears. i should also point out that of the t-case i saw blow and on mine personally, the JK's in question were both suffering slight driveline vibrations at high speeds. if anything, the evidence point to this vibration being the cause of t-case failure.
The pictures have shown a drive shaft with a double cardan at the t-case. I assume the other end at the front axle has a single joint.
Is it common to all the failures that the front joint pinion angle is significantly more than "0"?
My advice for those with this setup, would be to not drive fast until this is figured out.
Speed seems to be the final ingredient (and the easiest to modify) just prior to the explosion.
Last edited by ronjenx; 01-10-2010 at 11:35 AM.
#17
JK Jedi Master
This has been my gut feeling since I posted the "recipe for disaster".
The pictures have shown a drive shaft with a double cardan at the t-case. I assume the other end at the front axle has a single joint.
Is it common to all the failures that the front joint pinion angle is significantly more than "0"?
My advice for those with this setup, would be to not drive fast until this is figured out.
Speed seems to be the final ingredient (and the easiest to modify) just prior to the explosion.
The pictures have shown a drive shaft with a double cardan at the t-case. I assume the other end at the front axle has a single joint.
Is it common to all the failures that the front joint pinion angle is significantly more than "0"?
My advice for those with this setup, would be to not drive fast until this is figured out.
Speed seems to be the final ingredient (and the easiest to modify) just prior to the explosion.
#18
JK Freak
Personally, I wouldn't rule out the chain stretching from the additional stress of bigger tires and vibrating drivelines and then letting loose at high speed. In my experience back in my heavy wheeling days with Ford trucks and Broncos you would never see a failure like this with a NP205 as its a completely gear driven transfer case. I've OH them a couple of times and to tell you the truth they really didn't even need it and they were behind built 460's running 36 inch Ground Hawgs, Buckshot Mudders and Mickey Thompson MT's. The NP203 on the other hand... kaboom! and then they went in the scrap pile....
#19
JK Jedi Master
Personally, I wouldn't rule out the chain stretching from the additional stress of bigger tires and vibrating drivelines and then letting loose at high speed. In my experience back in my heavy wheeling days with Ford trucks and Broncos you would never see a failure like this with a NP205 as its a completely gear driven transfer case. I've OH them a couple of times and to tell you the truth they really didn't even need it and they were behind built 460's running 36 inch Ground Hawgs, Buckshot Mudders and Mickey Thompson MT's. The NP203 on the other hand... kaboom! and then they went in the scrap pile....