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Post by dasnoboarder on May 12, 2006 16:19:32 GMT 11
Hey. I was reading one of the threads on G80 LSD's in MU's, and I just went out to the garage to see if I could find out if I have one. Truck is a '93 MU 4JB1T So I jacked up rear wheels... When I turn the rear left wheel forwards, rear right wheel goes backwards. When I turn the rear left wheel backwards, rear right wheels goes forwards. When I turn the rear right wheel either way, the left wheel does not move at all. Do I have an open diff? an LSD? a broken LSD? a broken open diff?  Just tell me what I do have please ;D Andy (any help appreciated) |
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Post by pig75 on May 12, 2006 16:36:19 GMT 11
Open diff. the left break might be a bit tight
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Post by dasnoboarder on May 12, 2006 16:45:04 GMT 11
Damn, does anyone agree with pig75?
Just for confirmation...
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Post by geeves on May 12, 2006 16:56:59 GMT 11
Try the same test with the car in gear (motor not running) You will see the same for left and right If you dont you wouldnt be able to drive it anywhere. What happened on the left was that the driveshaft spun instead of the wheel on the other side This could be for a variety of reasons none worth worrying about. Its not lsd, bad luck
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Post by mudgrip4 on May 12, 2006 16:58:12 GMT 11
He is right - you have an open diff.
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Post by dasnoboarder on May 12, 2006 17:07:13 GMT 11
Is it easy to swap my open diff for a LSD?
If yes, how much would it cost me?
I don't need anything like an ARB air locker (it's a daily driven road car and only gets off-road about once every two weeks).
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Post by mudgrip4 on May 12, 2006 18:52:48 GMT 11
Quite easy to swap open diff for lsd - did this on mine a couple of years ago and find definite advantage off road. Best place to buy one secondhand is probably "Bits for Isuzu" in Auckland - click on the 4x4 CARE column on the home page, then "Spare Parts" , then the Bits for Isuzu logo, and you'll have all their contact details. I asked for their best club price and got mine for $405. Same item in Chch was $670-770, so their prices are good.
Probably 3-4 hours to put in, and you must first check exact diff ratio for your truck. LSD probably fine for you but if you want to spend a bit more you can get - depending on your model - a rear lokka from 4wd Sysyems Online in Adelaide though they're probably $600+ now delivered(before fitting cost), with our dollar rapidly deflating.
Forgotten exactly what I did to measure diff ratio - marked both tyre and driveshaft and rotated tyre twice I think and counted turns on the driveshaft - someone here will give you this process accurately. Quite easy.
Mike
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Post by Harry on May 12, 2006 18:56:30 GMT 11
After much consideration and contemplation I could be forced to part with my 4.56:1 lsd diff.$300 ovno and its yours.
Regards,Harry.
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Post by geeves on May 12, 2006 19:03:05 GMT 11
To change is easy (technicaly anyway I had a bruised chest for a week after doing mine) Hardest part will be finding an lsd for sale. An lsd will cost about half what it costs to buy a front auto locker but theres a little more work in fitting the locker as you fit it to your diff.
To chage all you do is remove the brake calipers then undo the 4 bolts that hold the axle assembys in and withdraw the axles. Then lie under the diff facing the rear of the car and undo the 12 bolts that hold the diff in Then slide the diff out onto your chest It pays not to be too skinny at this point Dont drop the diff onto your chest It ways about 30kg and hurts enough when your chest is at the same hight. Wriggle forwards till you can gentaly roll the diff onto the garage floor. Clean as much oil as you can from the diff housing and use a good sealant on the diff matting face. Roll the new diff onto your chest and wriggle under the diff housing and slide into place. It will jam several times before going in correctly and your wife and kids will learn several new words. Then bolt everything back together in the opposite order fill with lsd oil Easy
You need to watch the ratios which must match your front diff It will be 4.3 or 4.56 All bighorns from 88 onwards and Mus have the same diff in the rear.
My chest is a tight fit under the diff which is why I got away with this method If you drop the diff onto your chest you will break things and they wont be the diff
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Post by dasnoboarder on May 12, 2006 19:44:46 GMT 11
After much consideration and contemplation I could be forced to part with my 4.56:1 lsd diff.$300 ovno and its yours. Regards,Harry. Thanks for the offer, but I'm going to get an exhaust done first. An LSD is a bit further down the track and wishful thinking at the moment. (I'm only a high school student, so i don't have the $$$$)  |
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Post by Jimmu on May 12, 2006 20:10:51 GMT 11
When I swapped mine the hardest thing I found was taking off the big nut holding what I think is called the yoke on. Well worth the effort though. It made a bigger difference off road than adding the lokka did. Though I think they are both worthwhile  Jimmy |
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Post by Bruce on May 12, 2006 21:28:45 GMT 11
Detroit make a LSD 26 spline for our trucks, I have not asked a price as yet. Stand by I'll find there web site Locked Drive Systems they are in NSWdo not have web site for them e'mail is lockeddrive@ozmail.com.au
Cheers Bruce
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Post by Bruce on May 12, 2006 21:37:32 GMT 11
Just checking there web site out again and the maker of these LSD is called Dominator and it loks like they make an LSD 17 spline which might fit the frony diff? well try to find out how to geet to there web site, I just asked for there prices any way.
Cheers Bruce
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Post by dasnoboarder on May 13, 2006 6:38:07 GMT 11
So there is a brand called Dominator that makes a 17 spline front LSD and a 26 spline rear LSD?
Or is Dominator for the 17 spline front LSD, and Detroit 26 spline LSD for the rear?
As you might have guessed, I am just getting into to 4wding, and do not know much of the technical stuff.
What LSD type do the Isuzu (G80 option), Detroit & Dominators use? E.g. Syncro, Positraction, Hyrdraulic, Electric etc.
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Post by mudgrip4 on May 13, 2006 8:47:47 GMT 11
Hi Bruce - be interested to see what the Dominator locker (17 spline) is worth. Ask them for club/trade price. Is this specifically for the bighorn front end?
Thanks, Mike
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Post by Bruce on May 13, 2006 17:51:13 GMT 11
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Post by Bruce on May 15, 2006 12:38:54 GMT 11
Have just been told from the guy at Locked Drive that they only have diffs for the V6 Jackaroos and that the diffs in tem have the same splines but are a bigger diff.
Does anyone know how much a re built/ second LSD for the rear is?
Cheers Bruce.
PS the reason for asking is thwe Wizard only has an open diff.
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Post by dasnoboarder on May 15, 2006 16:09:25 GMT 11
Have just been told from the guy at Locked Drive that they only have diffs for the V6 Jackaroos and that the diffs in tem have the same splines but are a bigger diff. Does anyone know how much a re built/ second LSD for the rear is? Cheers Bruce. PS the reason for asking is thwe Wizard only has an open diff. He just told me the same thing. So is the only option for an LSD (rear, and for a MU) a second hand factory option? Or is there another website for me to go to? |
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Les
Isuzu Baby
Posts: 28
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Post by Les on May 15, 2006 17:51:28 GMT 11
Bruce have you considered putting a lokka in the front diff this may be a good alternative i have mates with them in a few different vehicles and all report good perfomance from them there a a few posts regarding these under any other mods i think
cheers Les
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Post by Bruce on May 15, 2006 17:57:43 GMT 11
Hi Les Iam thinking about putting one in the MU it has a LSD in the rear, But my Wizard has an open rear diff and putting a lokka in the front might put to much strain on the front axles.
Cheers Bruce
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