Dana 30 Bang! (Sorry might be long)

BingBing · Jul 28, 2005

Hey there no one can seem to tell me whats going on here. I do mostly rockcrawling out here in MA. When in 4wheel trying to get traction by sawing at the wheel or even sometimes moving from a stopped position with the wheel slightly turned i get a clicking or a loud bang from the front axle. This doesn't happen all the time. Yes I did a search and came up empty. Yes i've checked the spider gears and ring and pinion for missing teeth, axle shafts are intact, ball joints have no play, axle joints have no play, and both wheel bearing assemblies are new, track bar is tight, rod ends are new. I have a 91 2 door, d30 HP front open, dana 35 rear locked, 242 t-case, 4.5" lift with 33's.

bj-666 · Jul 28, 2005

you said rod ends how do you have them attached. i am assuming they are for your steering. make sure the bolts holding the rod ends are real tight also check your CA mounts

RCP Phx · Jul 28, 2005

Could be the transfer case chain/drive gears.

BingBing · Jul 28, 2005

Just oem replacement tie rod ends. I have Tera's lower flex arms their tight. I read about someone else having the t-case chain slipping under load but hearing the noise in the front end doesn't make sense to me that it would be that but i guess anything is possible.

BingBing · Jul 28, 2005

Anybody else?

mack · Jul 28, 2005

i had a noise just like that once, i was SURE it was the front end, turned out to be a bad motor mount, just for the hell of it, have someone look at the mount while you give it gas in gear.

barillms · Jul 28, 2005

I get a loud bang too, but mine isn't the axle. It's my front coils hanging up on the lip of the metal bumpstop stud. Just a suggestion....

devildog0 · Jul 28, 2005

I had a loud bang a while back when I would saw the wheel back and forth or go around a sharp enough corner. The axle side trac bar mount had a bad bushing AND the bolt hole was wallowed out.

Mr.OverKill · Jul 28, 2005

in feb i had a loud bang but it was easy to figure out what it was

the engine blew apart ( two pistons out the side of the block ) ( 1985 v6)

Michael McAtee · Jul 28, 2005

Is your d30 a disconnect model ? if so it could be that the sleave that connects the axel together (when in 4wd) is cracked legthwise and slipping teath when under a load. This happen to me......

falcon556 · Jul 28, 2005

Track bar or track bar bracket.

Kejtar · Jul 28, 2005

cracked tube causing the axle end trackbar mount to do funny things??

afd516 · Jul 28, 2005

Check all your welds. Rock crawling tends to cause stress to places that wouldn't normally see stress. One of your welds may be stressing back and forth but when you are at a stop and look under there it may not be very noticeable, :eyes: , unless they come completely apart.

BingBing · Jul 28, 2005

Allright guys it is a non-disconnect axle and thanks for all the replies now I have some things to check for on the trail this weekend. Thank You.

WI88XJ · Jul 28, 2005

Same thing with my disco last year before I locked the sleeve over both axle ends. I had been doing water crossings and the vacum activator filled w/water and wouldn't completely engage the sleeve. Banged loudly as it engaged/slipped. A bad diaphram in the activator would do the same thing. Not let the sleeve totally engage the axle end in the housing.

Michael McAtee said:
Is your d30 a disconnect model ? if so it could be that the sleave that connects the axel together (when in 4wd) is cracked legthwise and slipping teath when under a load. This happen to me......

WI88XJ · Jul 28, 2005

Whoops! Posted before I read that it was a NON disco. I need to pay better attention if I'm going to give advice!

creeperjeep · Jul 28, 2005

RCP Phx said:
Could be the transfer case chain/drive gears.

I second that for sure, thats what mine was when it did that,,
It will get worse and sound like a machine gun

olivedrabcj7 · Jul 28, 2005

mine is doing the exact same thing the original poster described. i have rustys adjustable trackbar with the HD bracket and bushing. every bolt on there is as tight as humanly possible to get them. impacted down and then used a long cheater bar on them. mine occurrs when my left front tire goes up and forces the left rear to droop. it makes a pop sound. after i tightened my trackbar up it chenged from a low pitched pop sound to a higher pitched creak sound. im almost convinced its coming from the rear somewhere but everything is tight. oh well. as long as nothing is falling off i dont guess i mind it.

StevenJ · Jul 28, 2005

I also had a stretched chain in my 242 that made a bang sound when it slipped. It only did it under high stress like climbing the steep ledges in Moab. It also sounded like it was coming from the front axel. Maybe by turning the wheel you are adding enough extra stress that it makes your chain slip.

SJ

BingBing · Jul 29, 2005

Really i guess were gettin' alot of votes for the t-case drive chain slipping. I'll talk with my local jeep shop about the t-case and see if they have come across this before. What's a new chain go for anyway? Thank you for all the help!!!

Dana 30 Bang! (Sorry might be long)

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