rear axle problem - Pirate4x4.Com : 4x4 and Off-Road Forum

zuki_06 · 07-22-2007, 11:22 AM

The other day i was driving the old sammi down the highway and noticed a vibration coming from the rear at about 55 then around 60 it stopped. The axle is stock and the tires were put on just before winter and balanced and what not. So after i get home i park the sammi and put it in first and twist the drive shaft with my hand and it seems like it turns a bit before it engages at the diff.. wtf is goin on? is my rear end shot? i guess i was kinda hard on her last winter with all the sweet snow drifting and clutch kicking but does anyone got any ideas?

zuki_06 · 07-22-2007, 11:23 AM

o yeah and its only when im on the throttle, when i coast it stops.

Canadian_Zuk · 07-22-2007, 11:26 AM

Sounds like your pinion nut is loose. Drop the rear drive shaft and see it its still steaked. If not, snug it up and re-steak the nut with a chisel.

-CZ

backpack96 · 07-22-2007, 11:27 AM

Quote:

Originally Posted by zuki_06

The other day i was driving the old sammi down the highway and noticed a vibration coming from the rear at about 55 then around 60 it stopped. The axle is stock and the tires were put on just before winter and balanced and what not. So after i get home i park the sammi and put it in first and twist the drive shaft with my hand and it seems like it turns a bit before it engages at the diff.. wtf is goin on? is my rear end shot? i guess i was kinda hard on her last winter with all the sweet snow drifting and clutch kicking but does anyone got any ideas?

How many degrees about, is "a bit"?

catzuk · 07-23-2007, 11:44 AM

Ok, need more info. Do you have a locker? Changed gears in either t-case or rear end? Is it all stock? Have a lift? Yada Yada....

There should be some movement when you turn the driveshaft by hand. Thats called backlash. You can get close to a quater rotation of driveshaft under normal conditions. If you have a rear locker, you can get a lot more as there is a lot of stuff that has to mesh together in there.

Put the tranny in neutral, t-case in neutral and put parking brake on to try this. check you drive shafts for slop in the u-joints or in the slip yolk. Don't forget to check the intermidiate shaft too. If anything is loose, replace it.

The pinion nut. Careful there on tighting it. These rear ends have crush sleeves in them to put the proper pre-load on the pinion. You can just tighten it, but only if you know how to tell how the pinion should "feel" to get the proper pre-load. Not the prefered method, but will work till you get a new crush sleeve.

Check the wheel bearings, the rears if thats where your vib is from. Might as well check the fronts while your at it. Just jack up and grab wheel. Shake to see if there is play.

Ummm...... Thats all I can think to try first.

Yankee Tim · 07-24-2007, 06:08 AM

Also check the bolts/nuts that holt the drum to the shaft. I've seen these loosen over time, and wallow out the hole and get loose and clunky like you mention.

zuki_06 · 07-25-2007, 09:05 AM

ok. all stock. u joint seems fine that was my first thought. also it makes a clunk noise when i get on the gas after ive let completly off.

zuk1988 · 07-25-2007, 12:22 PM

U bolts tight?

zuki_06 · 07-28-2007, 08:14 AM

ubolts are fine. im gonna drain it and take a look today.

zuki_06 · 07-29-2007, 09:12 AM

nvm it was the ujoint back by the axle its shredded 15 bucks 4 a new one

07-22-2007, 11:22 AM	#1 (permalink)
zuki_06 Registered User Join Date: Nov 2005 Member # 62642 Location: Near Fort Wayne IN Posts: 251	rear axle problem The other day i was driving the old sammi down the highway and noticed a vibration coming from the rear at about 55 then around 60 it stopped. The axle is stock and the tires were put on just before winter and balanced and what not. So after i get home i park the sammi and put it in first and twist the drive shaft with my hand and it seems like it turns a bit before it engages at the diff.. wtf is goin on? is my rear end shot? i guess i was kinda hard on her last winter with all the sweet snow drifting and clutch kicking but does anyone got any ideas? __________________ 88 Sammi - extended shackles - spray bombed interior and exterior

07-22-2007, 11:23 AM	#2 (permalink)
zuki_06 Registered User Join Date: Nov 2005 Member # 62642 Location: Near Fort Wayne IN Posts: 251	o yeah and its only when im on the throttle, when i coast it stops. __________________ 88 Sammi - extended shackles - spray bombed interior and exterior

07-23-2007, 11:44 AM	#5 (permalink)
catzuk Granite Guru Join Date: Mar 2005 Member # 44135 Location: Pueblo,CO Posts: 855	Ok, need more info. Do you have a locker? Changed gears in either t-case or rear end? Is it all stock? Have a lift? Yada Yada.... There should be some movement when you turn the driveshaft by hand. Thats called backlash. You can get close to a quater rotation of driveshaft under normal conditions. If you have a rear locker, you can get a lot more as there is a lot of stuff that has to mesh together in there. Put the tranny in neutral, t-case in neutral and put parking brake on to try this. check you drive shafts for slop in the u-joints or in the slip yolk. Don't forget to check the intermidiate shaft too. If anything is loose, replace it. The pinion nut. Careful there on tighting it. These rear ends have crush sleeves in them to put the proper pre-load on the pinion. You can just tighten it, but only if you know how to tell how the pinion should "feel" to get the proper pre-load. Not the prefered method, but will work till you get a new crush sleeve. Check the wheel bearings, the rears if thats where your vib is from. Might as well check the fronts while your at it. Just jack up and grab wheel. Shake to see if there is play. Ummm...... Thats all I can think to try first. __________________ 87 Zuk, dana 44's w/5:38 detroits,coils/3 link frt, 3 link rear 37" Krawlers 87 Zuk, SPOA, Lockright/spool, 31" Truxs MT's. shaved and trussed stock axle housings,1.6/w 1.3 head, fuel injected, 4.16 t-case 88.5 Zuk future project pending

07-24-2007, 06:08 AM	#6 (permalink)
Yankee Tim Registered User Join Date: Nov 2003 Member # 24386 Location: Catskill Mts., NY Posts: 554	Also check the bolts/nuts that holt the drum to the shaft. I've seen these loosen over time, and wallow out the hole and get loose and clunky like you mention. __________________ Yankee Tim www.rok-freekz.com

07-25-2007, 09:05 AM	#7 (permalink)
zuki_06 Registered User Join Date: Nov 2005 Member # 62642 Location: Near Fort Wayne IN Posts: 251	ok. all stock. u joint seems fine that was my first thought. also it makes a clunk noise when i get on the gas after ive let completly off. __________________ 88 Sammi - extended shackles - spray bombed interior and exterior

07-22-2007, 11:26 AM	#3 (permalink)
Canadian_Zuk Registered User Join Date: Apr 2004 Member # 29850 Location: Pickering, Ontario Posts: 338	Sounds like your pinion nut is loose. Drop the rear drive shaft and see it its still steaked. If not, snug it up and re-steak the nut with a chisel. -CZ

07-25-2007, 12:22 PM	#8 (permalink)
zuk1988 Registered User Join Date: Jun 2007 Member # 93886 Location: Lake Stevens WA Posts: 298	U bolts tight?

07-28-2007, 08:14 AM	#9 (permalink)
zuki_06 Registered User Join Date: Nov 2005 Member # 62642 Location: Near Fort Wayne IN Posts: 251	ubolts are fine. im gonna drain it and take a look today. __________________ 88 Sammi - extended shackles - spray bombed interior and exterior

07-29-2007, 09:12 AM	#10 (permalink)
zuki_06 Registered User Join Date: Nov 2005 Member # 62642 Location: Near Fort Wayne IN Posts: 251	nvm it was the ujoint back by the axle its shredded 15 bucks 4 a new one __________________ 88 Sammi - extended shackles - spray bombed interior and exterior

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