saxon
Getting the Wheeling Fever
Reged: 05/23/05
Posts: 35
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The truck vibrates out of the rear end when you hit certain speeds on flat pavement. At about 40mph, you can actually see the back end of the bed (long bed) moving up and down through the mirrors.
I've ran the truck with the rear end on jack stands and there is not any huge extra movement in either of the wheels (there was some on both sides but it was up and down, not left to right which would indicate a bent axle). Both of the tires have been recently balanced, too (Les Schwabb). I asked them if the (OE, steel SR-5) wheels were bent (nothing obvious) and they said they were okay. The shocks are about one year old Monroe Gas Magnum Pluses.
I'm now thinking that one or both of the axle are bent but not enough to be obvious to the eye. I've not yet tried this but I recently bought a metric dial gauge and 20 lb. magnetic stand. If I pull off the wheel (and maybe the shoes for better access), can I check the end of the axle for runout? Can I get the gauge behind the flange where the wheel goes and check this? I assume that there is supposed to be zero runout; no tolerance. I did not see any specifications for this in the Toyota Bentley manual.
btw, the truck is a stock solid rear axle, '82 2WD.
Bad wheel bearings? They aren't making any noise (usually they click when the start to go out) but I guess that doesn't prove anything.
Other things to check? The truck was in an accident several years ago and it was the passenger side rear end that was hit. Drives straight though (its subsequently been aligned), no pull to one side, and it doesn't crab on the freeway.
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saxon in seattle
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avtech
Getting the Wheeling Fever
Reged: 01/14/06
Posts: 26
Loc: Marietta GA.
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I would also check the play in the pinion. Also check your u-joints. Goodluck! 
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4Crawler
Toyota 4-Wheeling Forum Moderator
Reged: 01/12/00
Posts: 12144
Loc: N. California. USA
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Yep, you can check for runout. Rear axle on jackstands, block the fronts and run the engine at idle in gear to watch for tire/wheel wobble. If seen, remove wheel and check at hub flange. FSM specs 0.2mm/0.008" max. flange runout. Basically, if you can see it move, it is too much.
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r.c.brown@ieee.org
TruckEditor@tlca.org
Project: 4Crawler
4Crawler OffRoad - 4x4Wire discount code
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kewlynx
Toyota & Classifieds Moderator
Reged: 10/06/02
Posts: 15756
Loc: Fairbanks, Alaska
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To add, yep, check ujoints, AND check the runout on your driveline. I wallowed out my rear 3rd a few years back; fixed it, started to whine again, friend discovered I had tweaked the d/l at some point. Got it rebalanced, and it's behaved ever since.
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http://www.walkablecommunities.org/
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**ubi apis- ibi salus**
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