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Post by geeves on Jul 17, 2007 20:31:07 GMT 11
lsd oil wont do any harm in a normal diff
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Post by muvit madness on Jul 17, 2007 20:43:01 GMT 11
ok old oil is out & replaced with the 2litres of SAXFA just waiting for the weekend to take it for a drive as theres no time thru the week to scratch meself. also decided to drop the 80w/90 out of the rear pootrol limo & replace it with the heavier duty LSX 85/140. same goes for the front diff as well as there is no oil in there yet, hopefully take back the unused 4L of 80w/90 to repco without a reciept  dont like my chances tho... but i'll keep yous posted this weekend how the mu went. thanks too all once again. cheers muvit  |
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fly3r
Isuzu Senior
Shmoou
Posts: 197
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Post by fly3r on Jul 18, 2007 20:45:14 GMT 11
WOW there is a lots technical stuff with limos!!! well you learn something everyday!! good luck with the LSD!  |
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Post by muvit madness on Jul 19, 2007 21:59:44 GMT 11
cheers fly3r shame you were'nt down in sydney to come & play outta cabbage tree this weekend at least i'd know there was one definate truck wheelin with me. catch ya in december for some "core" 4wdin. in anticipation muvit |
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Post by muvit madness on Jul 21, 2007 21:56:40 GMT 11
ok just updating my progress with the limo replaced the oil with the SAFAX drove around 50ks with it & went wheelin for half an hour. i noticed when one wheel came slightly off the ground it spun freely with very little drive to the grounded one even when the brake was tapped whilst accellerating. did this several times with a slight rocking outcome but still not enough to climb the obstacle. on the other hand when both wheels are on the ground they both broke traction together & started spinning. once again i performed this several times with the same outcome limo seemes to work when both wheels are planted firmly on terra firma but when ones off the ground it decides to go for a sleep maybe its time to get it retightend what do you guys think? cheers muvit |
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Post by geeves on Jul 22, 2007 11:40:13 GMT 11
tightening might help but that sounds pretty much correct for lsd.
On one of the auto locker sights they describe a brick test. This is where you put a brick in front of a front wheel then jack a back wheel off the ground. A correctly functioning lsd will not be able to drive off the jack and over the brick but the auto locker can. Tightening a lsd to the point it passes this test will make it handle like a pig and eat tyres as it wont be able to slip enough during cornering
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Post by mudgrip4 on Jul 22, 2007 14:05:17 GMT 11
Mine was tightened up to about 90% value of a locker without any handling or tyre problems, though I drove pretty cautiously on road - esp round corners. Tight lsd worked great, but did clunk and rumble more for a time, and tightness wore off over time and was due for tightening again after about 50,000ks to retain max bite.
Interested in how a fulltime auto locker will handle in the rear of a lwb bighorn - when they make one. Should be similar to the tight lsd experience. Heard somewhere there have been WOF questions re auto lockers in rear diff - anyone aware of this?
Mike
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Post by muvit madness on Jul 22, 2007 14:50:09 GMT 11
hi mudgrip did you get a professional to do the tightening or did you do it yourself? if so what did it entail? actually if anyone has done this procedure or can ellaborate on the procedure i'm sure it would help us budding back yard boys learn a thing or 2 regards muvit |
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Post by mudgrip4 on Jul 22, 2007 15:37:33 GMT 11
Tightening best done by a pro - mine by Diff Shop here in Chch. Cost about $300+ here for them to take it out, do job and refit. A bit less if diff head dropped off to them. Talk to a few local 4wd service shops and find out who can do it locally. Or one of the aussie guys on this site has had it done there (Pig75?) and could direct you there.
Good luck
Mike
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Post by muvit madness on Aug 1, 2007 23:00:36 GMT 11
no worries thanks mike nig emailed me the pdf on how to tighten a diff in general & i can tell you from reading & working out the provided formulas its pretty complicated & unless someone you know does it in front of you to show you how, for around 3 hung i'd rather let the professionals at it  . cheers muvit |
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Post by mudgrip4 on Aug 2, 2007 9:20:49 GMT 11
Good idea to get pros onto your lsd. I have a couple of diesel mechanic friends and neither overly willing to adjust lsds. If you can drop diffhead out and take that to shop, then refit afterwards yourself, you will save a few bucks.
If you find your tightened lsd sounds like a bucket of bolts after you've been running it a few hundred ks, experiment with one grade lighter lsd oil. After tightening I dropped from Redline Heavy Duty Shockproof (like your SAFAX), down to Redline 85w140, and the diff was a bit quieter but still mighty effective - bit like hell.
After you've had it tightened, jack up one rear wheel and see how hard it is to turn it while other wheel still on ground. Over time as tightening eases - which is normal - do this test say once every 10k, and if it is loosening a bit go back to the max grip SAFAX lsd oil from the 85w140.
Mike.
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Post by muvit madness on Aug 9, 2007 22:23:06 GMT 11
cheers for that mike i'll keep that in mind when the mutroll diffs are under starting the first week of september as the mu gets a new spray job next weekend then it gets gutted for the sas (solid axle swap) ;D cheers muvit |
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dont like my chances tho... but i'll keep yous posted this weekend how the mu went.
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