calvinh
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« on: November 19, 2011, 03:25:14 PM » |
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Whenever I'm in 4wd and the system is under load (accelerating, letting the clutch out) there is a severe banging/clunking noise from the front end.
Could it be the front driveshaft u joint? It only does it in 4wd, and does it while going in a straight line as well as turning.
I know its not bad gears in the differential, as I had the cover off last week and they are in perfect condition.
If it is the driveshaft, is it an easy DIY job? How much could I expect to pay a shop to do it?
Thanks!
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chardrc
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« Reply #1 on: November 19, 2011, 04:21:10 PM » |
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u-joints for the drive shaft or axle shafts would fit the description.
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1990 YJ 4cly, ax5, 2.5 inch BDS lift, 31 MTr's, Powertrax-lockers all around, track-bars removed, boomerang shackles, warn m8000 winch, electric fan.
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FourbangerYJ
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« Reply #2 on: November 19, 2011, 04:40:46 PM » |
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Grab hold of the front drive shaft and give it a good push pull from side to side and up and down. There should be very little if any play. If you have a bunch then it's time for new joints. They are pretty easy to swap. I would bet if you youtubed changing drive shaft U joints there is a lot of video on how to do it.
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Scott~ Using tools you have not used in a while is like shaking hands with old friends.  |
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calvinh
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« Reply #3 on: November 19, 2011, 08:45:42 PM » |
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Ok, I think it might be the transfer case chain slipping. The noise I'm experiencing is like this, just not as bad. http://www.youtube.com/watch?v=xIKq-ihpzQIIs the chain replacement on a np231 pretty easy? |
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sharpxmen
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« Reply #4 on: November 19, 2011, 09:11:05 PM » |
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i doubt it but if that's it you'd need to take it apart, not hard but keep track of all the parts. |
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Bounty Hunter
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« Reply #5 on: November 20, 2011, 08:20:15 PM » |
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A stretched chain will cause a banging noise when in 4wd and under load, it's the chain skipping on the sprockets.
The chain runs about $70 and is relatively easy to replace. Shoot me an email if you run into any problems and I can walk you through them. bountyhunter AT sija.org .
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jfrabat
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« Reply #6 on: November 22, 2011, 03:11:49 PM » |
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A stretched chain will cause a banging noise when in 4wd and under load, it's the chain skipping on the sprockets.
The chain runs about $70 and is relatively easy to replace. Shoot me an email if you run into any problems and I can walk you through them. bountyhunter AT sija.org .
If it was the chain, you could also consider going to the larger (thicker, not longer) one. I dont remember the specs, but I am sure others can chime in here and let you know what you need... |
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'94 YJ 2.5L with 4" RE lift, Adv. Ad. SYE, Woody Shaft, Superwinch EPi9.0, 62mm TB, FoMoCo e-Fan, SD30 and SD35 w/ARB-4.88, 165A alt., 4 KC aux lights, Aluminum Rad, BRX hoses, 33" BFG KM2 on 15" AR wheels, Sony sound system, Pavement Ends Hardtop, Bosch 19# Injector, Safari Snorkel, Hydroboost
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neale_rs
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« Reply #7 on: November 22, 2011, 04:04:26 PM » |
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I'll vote for axle u-joints. Mine was like that when I bought it.
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calvinh
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« Reply #8 on: November 23, 2011, 01:51:01 AM » |
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Im 99% sure its the chain as it isn't just a single clunk, it definitely feels like a slipping chain on a bike.
I'm headed to the junkyard tomorrow to try to get a chain off a cherokee, because they don't have any wranglers.
If they have any 2.5 cherokees there I might try to get a tps sensor, iac, and whatever else I can think of
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FourbangerYJ
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« Reply #9 on: November 23, 2011, 09:18:25 AM » |
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Im 99% sure its the chain as it isn't just a single clunk, it definitely feels like a slipping chain on a bike.
I'm headed to the junkyard tomorrow to try to get a chain off a cherokee, because they don't have any wranglers.
If they have any 2.5 cherokees there I might try to get a tps sensor, iac, and whatever else I can think of
Did you check any of your U joints? |
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Jeffy
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« Reply #10 on: November 23, 2011, 01:41:57 PM » |
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Did you check any of your U joints?
A loose U-joint strap or a bad joint will also make repeated clunks. |
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FourbangerYJ
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« Reply #11 on: November 23, 2011, 02:53:20 PM » |
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A loose U-joint strap or a bad joint will also make repeated clunks.
That's where I would have started to look. |
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Scott~ Using tools you have not used in a while is like shaking hands with old friends. |
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sharpxmen
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« Reply #12 on: November 23, 2011, 02:57:19 PM » |
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is the noise coming from between/under the seats or from the front? that could tell where the problem is (with 1 remaining u-joint at the front output of the t-case which can be easily ruled out if there is still a doubt).
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Bounty Hunter
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« Reply #13 on: November 23, 2011, 04:47:57 PM » |
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I would recommend against using a used transfer case chain, it's a roll of the dice for all the work involved, and new ones are inexpensive.
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calvinh
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« Reply #14 on: November 24, 2011, 01:55:07 AM » |
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Checked the u joints today, no slack in the driveshafts, the slack was coming from the transfer case... so I think its confirmed as being the chain.
I probably won't even end up doing the repair this year, because I've only had to use 4wd once so far and it still works well unless its under a lot of load.
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