luke
Isuzu Baby
Posts: 3
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Post by luke on Jun 21, 2006 23:49:55 GMT 11
I have had my '90 bighorn for about a year and the handbrake hasn't been working. Finally decided to sort it out. It works ever so slightly. I took the rear wheels off to check and the brake pads are ok. The lever on the caliper operates but gets pulled as far as it can move without the brakes being applied much. It has a wee bit of braking in the right and next to nothing on the left. Both sides seem to operate properly with the brake pedal though. Is there any way to adjust the handbrake other than tensioning the cable which is not the problem.
Problem no. 2 I think my front diff is shagged. When I lock the front hubs and turn sharply on dry tarmac the vehicle shudders and tyres chirp. It does this even in 2H with the front hubs locked. With the hubs unlocked it is fine on road though the occational clunk can be felt through the steering. Off road performance pretty poor but it is definitely getting at least some drive to the front. Does this suggest that the spider gears are rooted and diff needs replacing?
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Post by James W on Jun 22, 2006 7:39:01 GMT 11
Re handbrake; yes you do need to adjust them up. On the caliper there is a M13 ? nut with a copper washer under it. Remove it and deep inside is an allen key screw. Abut 2.5mm?. With the wheel jacked up and the handbrake released and cable LOOSE - important. Adjust this allen screw inwards untill you can't turn the wheel anymore. Loosen just enough to again free up the wheel. These often sieze or are stiff, you consider CRC squrted up the hole. Front diff; I'm not sure what the cause is but it does sound like you have lost differential action in the front. It's not good on sealed roads and can make turning difficult but it may prove an advantge off road... so long as you don't have to turn corners. Whats the history of the vehicle? Is it plausable someone has fitted a Lincoln locker?..... Lincoln is a brand of Welders  |
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Post by mudgrip4 on Jun 22, 2006 9:06:51 GMT 11
Some of your diff noises sound like some of symptoms of a lsd - did any bighorns come with this in front. Will the standard lsd test (we use on rear axles) apply to front if no motive power coming from driveshaft? - i.e. jack up front till both wheels off ground, click in freewheel hubs, rotate one wheel forward and watch if opposite wheel goes forward also (usually lsd) or spins backward (open diff).
Perhaps give this a test - can't think why it wouldn't apply to front as rear though someone else may know better. If both wheels rotate forward its either a lsd or as James suggests someone has welded together the spider gears - a fairly bad idea for onroad vehicles. The concern is if it does have either a lsd or welded diff it should be performing well offroad, not poorly. Stuffed lsd?
Mike
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luke
Isuzu Baby
Posts: 3
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Post by luke on Jun 22, 2006 11:32:50 GMT 11
Thanks for the brake info I'll try that tonight.
The front diff is deffinitely not fully locked because I have seen one front wheel spinning while the other is stationary. Maybe could have been welded in the past and perhaps the welds broken and bits of metal floating around in there - maybe jamming the spider gears periodically. Or a faulty LSD though that would supprise me cos the back diffs open. Sounds like I need to replace it. Is it better to find a 2nd hand diff or try to replace the spider gears?
Cheers
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Post by mudgrip4 on Jun 22, 2006 11:52:26 GMT 11
If it is a faulty standard diff then spider gears fairly quick to put in once diff out, but maybe better to cover all possibilities and pick up a 2nd hand diff - most will be in good nick as some vehicles do little or no offroading. Longest job is getting it in and out of front of truck. Maybe pop it up and see if it shows a lsd some or all of the time- try to track the noise.
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Post by geeves on Jun 22, 2006 16:58:52 GMT 11
When you look at the brakes things to check before adjusting.
Are the cables free running.
Are the callipers free moveing on the slides.
Also when moveing the adjuster as described do be very carefull moveing the adjuster. It is easily broken. It is not unusual to find some fluyid around the adjuster It isa symptom of a bad seal but the nut has a copper washer and acts as a double seal
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Post by Harry on Jun 22, 2006 19:30:50 GMT 11
Your description of the reaction to driving on seal in 4wd is normal.It's called diff wind up or transmission wind up and happens because the tyres can't slip as they would on a loose surface.If you keep trying it you will break something in the diff or transfer case.
Harry.
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Post by Graham on Jun 27, 2006 23:38:49 GMT 11
In other words, don't use 4WD on hard surfaces - if the tyres can't slip then individual teeth on gears will slip straight off the gears.
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