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Pinion Issue?

2K views 19 replies 5 participants last post by  Getnoff 
#1 ·
SO my wrangler makes a whirling noise while in motion and only motion after excluding the transfer case and wheel bearings my mechanic said it could be the pinon. So I am sure also its something on the front differental as well. So today I did a fluid change and after the noise is quieter. I am going to assume that hes right but I need to price a new pinon and such.. Any suggestions as where/brand to get one. Hes a decent guy lets me bring my own parts and only charges me $35 an hour if after getting the parts myself i don't think i can pull it off in a weekend.

Thanks
 
#4 ·
I drive 100 miles a day for work, that's not an option It needs to be fixed before it goes and possibly takes out the rest of the axle in motion.
 
#6 ·
Its a front end noise. But I haven't tried 4wd since i bought and that was low speed never fast enough to hear the noise to start with will try later.
 
#7 ·
So it seems fine in 4hi but in 4 low it acts like the wheels want to hop not spin so i took it right out of 4 low before it did any damage. The whirling noise is louder in 4x4 but takes the same speed to get it to start.
 
#9 ·
concrete and trying to go straight line and it wanted to hop. i didn't dare turn the tires.
 
#13 · (Edited)
not that i know of but i bought it second hand and the suspension looks stock and needs work.

R u sure its in the front if so just take off the front driveshaft till u can get it fixed this should also let u know if its front or rear I would think
umm the noise sounds 100% front end. I would assume it is. and if its the pinon it would still make noise reguardless of the driveshaft being in or out.


Do u have a way to lift the rear end off ground and c if u still get the noise r not if no noise u will no for sure it's something to do with the front
I can jack it up and put it on jack stands and hope it doesn't fall off. I wish we had a dyno closer i could just strap it down and not worry.


Here are some pictures of the diff that i took during the fluid change.



 
#11 ·
R u sure its in the front if so just take off the front driveshaft till u can get it fixed this should also let u know if its front or rear I would think
 
#14 ·
Um. It looks to me that u had a bunch of water in there. I would do another fluid change and clean her up real well, and I am betting things will quiet down. Use a high temp lube like Amsoil I would recommend.
Troy
 
#15 ·
it was full of water. I cleaned it out best i could. and refilled it with synthic oil. but i can't seem to find AMS in the weight i need around here I have to order it. and can i go heavier? I don't plan on wheeling it ever. Just a nice looking daily driver when I am done.
 
#16 ·
FINALLY got the noise on video..starts at 8 seconds when i push my phone up under the dash towards the engine and around 20 seconds its clear as a bell.

https://www.dropbox.com/s/8qtmahkbu9xilpk/2013-07-06 21.55.50.mp4

sorry for the dropbox link its way faster than trying to use Youtube, and i don't want to risk them down sampling the audio.
 
#19 ·
is there a way to check that? or re-lube it? if no is the answer I am not opposed to a full axle rebuild but i am unsure who i should order shafts from. As my whole jeep is ummm "rusty" on the front and rear axle.
 
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