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post #1 of (permalink) Old 12-23-2002, 08:00 PM Thread Starter
 
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horrible vibration when slowing down

i have a 93 suzuki samurai and posted before about a front end vibration when braking but now realize it doesnt happen when braking. i think it only happens when slowing down and not applying gas. when i push in the clutch to slow down the whole vehicle shutters, the steering wheel shudders violently side to side, and you hear a loud knocking under the vehicle. it doesnt happen when going under 30mph or like i said when applying gas. could this be a transmission or clutch problem? anyone else have this happen?
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post #2 of (permalink) Old 12-23-2002, 08:16 PM
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Re: horrible vibration when slowing down

Have you checked the kingpin bearings yet?
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post #3 of (permalink) Old 12-23-2002, 08:24 PM Thread Starter
 
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Re: horrible vibration when slowing down

what and where are the kingpin bearings? how easy are they to check or replace?
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post #4 of (permalink) Old 12-23-2002, 08:50 PM
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Re: horrible vibration when slowing down

The kingpin bearings provide a means to turn the front wheels . If they get bad enough , the wheels won't stay in alignment when you try to stop . If you look at the front spindle assembly, you will see a cap on top and bottom with four bolts in them . Jack the truck up and support the axle with a stand, then use a pry bar to lift up and down on the wheel . If there is any movement , find out where it is . Wheel bearings can wear over time and become loose, or the kingpin bearings could be getting bad . Also, check the front steering stabilizer that is attatched to the pitman arm on the steering box . A lot of help can be had from a factory service manual , it's a good idea to get one . Hope this helps,
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post #5 of (permalink) Old 12-23-2002, 09:10 PM
 
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Re: horrible vibration when slowing down

What Sarge said first, If all looks tight either the steering damper is shot, and/or the grease seals
on the back of the steering knuckle need replaceing. Badly worn tires can also contribute.
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post #6 of (permalink) Old 12-23-2002, 09:13 PM
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Re: horrible vibration when slowing down

I know it may sound dumb but i had a similiar problem with my DD come to find out it was a worn out u-joint check all your shafts reall good. I thought my truck was coming apart. when it happened. look at your jack shaft between trans and the case.
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post #7 of (permalink) Old 12-23-2002, 09:31 PM
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Re: horrible vibration when slowing down

howdy,
i had the same problem when mine was stock. i was comen home from wheelen at my buddies farm when i hit the first stop sign. he thing felt like the whole front end was going to blow into peices. so i started off with king pin bearings. bottom passenger side king pin bearing was shot. then i test drove it. kind of helped, then i check the intermenat driveshaft and th u-joint was bad. this help some so i check t-case arms, bent all to hell. new t-case arms helped but not all the way. so then i found the passenger side engine mount bad, trans mount bad, and steering shock bad. just some things to start with.
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post #8 of (permalink) Old 12-24-2002, 02:46 AM
 
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Re: horrible vibration when slowing down

The key here is his comment about feeling the vibration rock the steering wheel. He might have a
bad U-joint or bent Xfer bars, but I doubt that would rock the steering wheel. Sounds more like a
case of the death wobble building up, and thats usually some where in the front axle itself.
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post #9 of (permalink) Old 12-24-2002, 05:29 AM
 
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Re: horrible vibration when slowing down

Your post indicates your truck is stock, if so, then I would do as indicated in some of the posts and start out checking u-joints, then depending on what you find, move into the knuckles replacing the king pin bearings and all the seals (wiper, felts, and axle/spindle) while it is apart. We just got in some new high quality rebuild kits for the knucles. They are $110 and include four new king pin bearings, and all the front axle seals. One kit does both sides of the axle. If your truck is lifted, then check the front pinion angle for u-joint misalignment and binding.

TGT - NCO
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