Birty Dastards Jeep Club
Tech Forum => Workshop => Topic started by: cheese_aholic on June 16, 2012, 07:43:43 PM
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How often should I be changing the oil in my diffs and transfer box?
Wondering if that's why my front is noisy?
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If you dont know when they were last done then do them.
Unless you think the oil maybe contaminated by prolonged sitting in shitty / muddy water, then so long as no silly big miles every 2 years but more often if lots of off road use.
And if your TJ is stock, the rear will need friction modifier from a jeep dealer in it too :icon_winkle:
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Thanks Gaz.
No idea when last done, but I'd hazard over 2 years ago.
Danas front and rear with ARBs (compressor not working either so no idea if the lockers still work!)
I have some mopar additive which I believe I need to add around 80ml per diff, and some semi synthetic gear oil. Take it no extra stuff needed cause of the ARBs??
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If you got ARB's, not sure you will need the modifier, only normally use it in stock diffs with clutch type LSD's.
Best wait till a proper tech comes along but def need to change the fluid if you dont know when it was last done for peace of mind & besides new oil aint gonna hurt :icon_winkle:
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No worries.
I assumed the Danas still had LSD so would need the additive...?
Will continue to seek clarification; thanks for your advice Gaz...
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ARB not need addative just normal oil
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Thanks peeps,
So just normal gear oil; got my gasket sealant, drain pan and a hand pump - what could possibly go wrong...!
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The factory reccomendation is to change every 30000 mikes. However, bearing in mind Jeep's horrific appetite for diff bearings, more frequent changes would be prudent. If you are offroading, use 75/140 full synthetic and check all axle and transmission oils for contamination every time you get home. A couiple of litres of oil costs a lot less than a diff rebuild.
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Thanks Mike for your sage advice.
I have some 75W90 - any good? Off road use won't be that much...
However, i'm more inclined to think its the hubs now.
With 4H engaged, but hubs still set to freewheel, there's no noise. In this situation, if it was the diff I would expect to hear the same noise...
Engage the hubs and the the noise starts...
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Did the front diff are the weekend; old oil like treacle so definately needed doing! Wasn't a full strip down, but everything inside looked OK (no teeth missing etc) so refilled with new oil and off we go. Still a funny noise when hubs engaged, but until something falls off I'll live with it!
Rear diff next time its dry enough to get under it, and probably transfer box oil too for good measure...
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ATF in transfer box................. :greggmo:
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Thanks tag; got a couple of litres in preparation!!! :icon_super:
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Question :
I take it you have taken the diff covers off to drain oil ?
Did you use new gasket to refit or sealant goop..... if so which ?
Thx.
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for your cj you will find no gasket at front and a funny O ring thing on the amc 20 but both like sealant
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Question :
I take it you have taken the diff covers off to drain oil ?
Did you use new gasket to refit or sealant goop..... if so which ?
Thx.
Took cover off and drained as much as I could.
Cleaned both faces and used silicone gasket goop.
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for your cj you will find no gasket at front and a funny O ring thing on the amc 20 but both like sealant
I have TJ with Dana front and rear.
Had silicone seal on from last time they were done so I just cleaned it off and applied new...
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yup 30 and 44
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What front hubs do you have on a TJ?
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What front hubs do you have on a TJ?
I have warn free wheel hubs front and rear.
Does it make a difference...?
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rear?
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rear?
Yup! Free wheel hubs on rear... Not sure why; they were on there when I got it...
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yup 30 and 44
Sounds about right...
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so in theory you can disengage front and rear and have no driven wheels?
don't doubt that what you have but have never seen it before and can't think why, am I missing something?
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Warn did offer front and rear kits in the day and I never fully understood puting them on the rear.
If you are getting noise from the front you should look at the little needle bearings that are in spindle for the outer stub shaft. This set up is the same as older dana 30 and 44 set ups and uses Ford Ranger hubs if I remember correctly. Sometimes the spindle seals leak and the needle bearing will make noise.
http://www.stu-offroad.com/axle/hubconv/hub-1.htm (http://www.stu-offroad.com/axle/hubconv/hub-1.htm)
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:iagree: Can see no real reason for having them on the rear! Hey ho! I'll see about stripping them down, but its a little out of my comfort zone TBH.
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Indeed seen them on the rear too - fuse links are getting scarce for warn hubs, best buy in bulk if you can.
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Indeed seen them on the rear too - fuse links are getting scarce for warn hubs, best buy in bulk if you can.
Thanks IOM - what's a fuse link?? :017:
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its the bit that goes bang first stead of ya shaft or diff main advantage of the warn kit on the rear is it gives you a full floater set up
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Indeed seen them on the rear too - fuse links are getting scarce for warn hubs, best buy in bulk if you can.
Thanks IOM - what's a fuse link?? :017:
These little bugga's....
(https://birtydastards.com/frm/proxy.php?request=http%3A%2F%2Fwww.trail.co.jp%2Fpages%2Fwarn%2Fwarn-hubs%2FHubFuseL.jpg&hash=db80222d572f5e04ac96bb53fef37fbd8c7408b5)
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Done rear diff as well now.
Still got my little noise - tried to pinpoint it while under the vehicle, but still none the wiser!!
Could it be front prop shaft??
Transfer box (although oil done recently in there...)?
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Does it have an LSD if so don't forget additive in the year diff to allow slip
Sent from my GT-I9100 using Tapatalk 2
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Does it have an LSD if so don't forget additive in the year diff to allow slip
Sent from my GT-I9100 using Tapatalk 2
D30 at the front and D44 at the rear - Mr bigjeepzj tells me I don't need additive...