Mines been clunking and whining for 50000km, bearings can handle a fair amount of abuse
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| Cause of excessive "backlash" rear diff http://auszookers.com/forum/viewtopic.php?f=5&t=23670 |
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| Author: | alien [ Fri Jul 08, 2011 8:38 am ] |
| Post subject: | Cause of excessive "backlash" rear diff |
Hey all... my diffs doing a nice thud when i let the clutch out, its definitely gotten worse over the last few weeks and happens in any gear if i let the clutch out medium/fast. Grabbing the rear tailshaft theres a ton of play in the pinion, and jacking the rear in the air i can move the wheels slightly left/right and up/down, only very slightly, but when i do it clearly moves the axle (can hear it). Rear diff hasnt been touched for 4 years since it had an airlocker installed, unis are new and no play. Anyone got a diagnosis for me before i take it in on monday to get a proper opinion? (ie: strip it down). |
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| Author: | royce [ Fri Jul 08, 2011 8:41 am ] |
| Post subject: | Re: Cause of excessive "backlash" rear diff |
any bearing that moves in the rear is rooted |
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| Author: | Mistaria81 [ Fri Jul 08, 2011 8:43 am ] |
| Post subject: | Re: Cause of excessive "backlash" rear diff |
bearings be fooked, take it to a diff specialist and get the to check it compleatley. |
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| Author: | alien [ Fri Jul 08, 2011 8:44 am ] |
| Post subject: | Re: Cause of excessive "backlash" rear diff |
hope so - i'd rather it be a bearing than anything with teeth... im afraid its a worn crownwheel... |
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| Author: | MrRocky [ Fri Jul 08, 2011 8:45 am ] |
| Post subject: | Re: Cause of excessive "backlash" rear diff |
st1ll a b1g j0b |
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| Author: | alien [ Fri Jul 08, 2011 8:46 am ] |
| Post subject: | Re: Cause of excessive "backlash" rear diff |
Follow up question - if i baby it (gentle on the clutch) is it going to survive doing 100km/hr for 45 mins, then about 3-5 hrs of low range crawling, then another 45mins of 100km/hr? before i take it in on monday? =) |
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| Author: | shep [ Fri Jul 08, 2011 8:51 am ] |
| Post subject: | Re: Cause of excessive "backlash" rear diff |
haha you should know that the only way to find out is to have a go. |
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| Author: | alien [ Fri Jul 08, 2011 8:55 am ] |
| Post subject: | Re: Cause of excessive "backlash" rear diff |
i plan to =) its been doing the clunk for ages now so i can't see it failing catastrophically on me (famous last words?) |
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| Author: | CompTruck [ Fri Jul 08, 2011 8:57 am ] |
| Post subject: | Re: Cause of excessive "backlash" rear diff |
if its from the gears - might break em on your trip if its from bearings - probably be ok |
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| Author: | Lockie666 [ Fri Jul 08, 2011 9:11 am ] |
| Post subject: | Re: Cause of excessive "backlash" rear diff |
If the bearing is rooted, then the pre-load on the bearing will effect the backlash between the crownwheel and pinion. I wouldn't drive it Arron, you're going to fruck it good and fast. |
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| Author: | alien [ Fri Jul 08, 2011 9:14 am ] |
| Post subject: | Re: Cause of excessive "backlash" rear diff |
when you say fruck it... am i going to do more damage than whats already been done? =) |
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| Author: | shep [ Fri Jul 08, 2011 9:16 am ] |
| Post subject: | Re: Cause of excessive "backlash" rear diff |
alien wrote: when you say fruck it... am i going to do more damage than whats already been done? =)
if a diff bearing collapses it will more likely then not take out the crown wheel and pinion as well. |
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| Author: | Lockie666 [ Fri Jul 08, 2011 9:17 am ] |
| Post subject: | Re: Cause of excessive "backlash" rear diff |
You could chip teeth off the crownwheel, the pinon and crownwheel are going to mesh wrong. I wouldn't risk screwing my airlocker for a few days driving. |
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| Author: | alien [ Fri Jul 08, 2011 9:22 am ] |
| Post subject: | Re: Cause of excessive "backlash" rear diff |
bugggerrrrr... hmmm. |
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| Author: | worldo [ Fri Jul 08, 2011 9:58 am ] |
| Post subject: | Re: Cause of excessive "backlash" rear diff |
Mine does this wear would I get new bearings. Im about to fit spartan locker so might as well do bearings. Anyone got a write up on changinv bearings? |
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| Author: | alien [ Fri Jul 08, 2011 10:13 am ] |
| Post subject: | Re: Cause of excessive "backlash" rear diff |
how long has yours been doing it for? lol |
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| Author: | Lockie666 [ Fri Jul 08, 2011 10:20 am ] |
| Post subject: | Re: Cause of excessive "backlash" rear diff |
worldo wrote: Mine does this wear would I get new bearings. Im about to fit spartan locker so might as well do bearings. Anyone got a write up on changinv bearings? if you need to ask then I don't think you should be attempting a spartan. Haha, you are gunna need a puller to get the carrier bearings off.
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| Author: | zooky08 [ Fri Jul 08, 2011 10:29 am ] |
| Post subject: | Re: Cause of excessive "backlash" rear diff |
My rear diff did the same as you explained I drove over 6 months like it was, but was no heavy 4wding neither did I have big tyres like yours |
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| Author: | worldo [ Fri Jul 08, 2011 11:49 am ] |
| Post subject: | Re: Cause of excessive "backlash" rear diff |
Bout 3 weeks ago it started becoming noticable. No one in coffs wants to do my locker as they keep tellin me there dodgy. So no choice but to have a crack. Im no mechanic but the old man is pretty good at it and a mates a mechanic sure We can figure it out. Lockie we have a bearing puller. |
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| Author: | smiffkid [ Fri Jul 08, 2011 11:53 am ] |
| Post subject: | Re: Cause of excessive "backlash" rear diff |
just baby it, check the oil for a start, if its a bearing it could collapse which means removing the rear shaft and driving it 4wd worst comes to worst u breack a tooth other wise its just needs some tlc t |
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| Author: | Lockie666 [ Fri Jul 08, 2011 12:32 pm ] |
| Post subject: | Re: Cause of excessive "backlash" rear diff |
smiffkid wrote: just baby it, check the oil for a start, This is the worst advice someone can give. The diff will be spinning regardless of there being a tailshaft or not. Please refrain from talking shit. Arron, just get it fixed mate, you will end up blowing your diff. You don't want to blow your diff on the road and having your rear lock up on the road. Its not cheap getting another center, pinon, crownwheel. You also run risk of fucking the housing too... Just expressing my opinion
if its a bearing it could collapse which means removing the rear shaft and driving it 4wd worst comes to worst u breack a tooth other wise its just needs some tlc t |
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| Author: | JrZook [ Fri Jul 08, 2011 12:42 pm ] |
| Post subject: | Re: Cause of excessive "backlash" rear diff |
x2 Lockie! |
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| Author: | hooki [ Fri Jul 08, 2011 3:32 pm ] |
| Post subject: | Re: Cause of excessive "backlash" rear diff |
x3 |
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| Author: | ajsr [ Fri Jul 08, 2011 10:09 pm ] |
| Post subject: | Re: Cause of excessive "backlash" rear diff |
smiffkid wrote: just baby it, check the oil for a start,
if its a bearing it could collapse which means removing the rear shaft and driving it 4wd worst comes to worst u breack a tooth other wise its just needs some tlc t for a bloke who is supposed to works in a 4x4 workshop/store you know sweet fuck all about cars. dont listen to noob boy, the inside end of the axle is supported by your diff bearings. so if you blow the diff the axle isnt going to turn real well is it. dont baby it because they always break at the best times just fixit while its still relitively cheap edit: I see someone else X 3 have said the same thing. just fix it |
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| Author: | royce [ Fri Jul 08, 2011 10:19 pm ] |
| Post subject: | Re: Cause of excessive "backlash" rear diff |
Mines been clunking and whining for 50000km, bearings can handle a fair amount of abuse
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| Author: | SierraDan [ Fri Jul 08, 2011 10:51 pm ] |
| Post subject: | Re: Cause of excessive "backlash" rear diff |
My front is the same as yours alien. I'm swapping a new one in today! But i'm lucky its in the front.. |
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| Author: | alien [ Mon Jul 11, 2011 9:43 am ] |
| Post subject: | Re: Cause of excessive "backlash" rear diff |
ok so i drove on the weekend and went 4wding for this photoshoot i had planned, just took it easy and babied the diff (rode the clutch a little more). Went fine all day, very proud of my sierra given what i've just found out! diff was stripped today and so far my damage list is: - 1 rear wheel bearing (replacing both obviously) - both rear axles (short side is twisted and fractured, long side is fractured) - diff bearings are a combination of buggered and on their way - replaced rear shoes while its all out will update if anything else is discovered by the diff specialist =) |
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| Author: | MrRocky [ Mon Jul 11, 2011 10:04 am ] |
| Post subject: | Re: Cause of excessive "backlash" rear diff |
suzistore do my diffs, much cheaper and better than other diff shops in perth, at least u know an apprentice isn peicing it together too 
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| Author: | alien [ Mon Jul 11, 2011 10:07 am ] |
| Post subject: | Re: Cause of excessive "backlash" rear diff |
haha nar mines being done by a pro, and he knows airlockers very well... he is also cost effective. Sean (suzistore) is on holidays for a week so suzistore wasnt an option. |
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| Author: | SierraDan [ Mon Jul 11, 2011 10:07 am ] |
| Post subject: | Re: Cause of excessive "backlash" rear diff |
i do my own 
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