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Re: Thanks but it's definitely not tires (+) Posted by CMyles [Email]  (#1126) [Profile/Gallery]
(more from CMyles) on Wed, 7 Nov 2007 12:06:02
In Reply to: Thanks but it's definitely not tires (+), Siegfried, Wed, 7 Nov 2007 09:37:13 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Sieg,
OK, that sounds more like an inner driver issue. You may find that you have a bad inner driver with a good tripod bearing, a good inner driver with a bad tripod bearing or both may be bad and of course either or both sides (passenger or driver's) could be involved. First, reach down (or up from below) and grab the axle shaft near the inner driver and try to move it radially. There should be only a very small amount of movement. Axial movement is normal, even essential. If the axle can be moved a lot (sorry, it's hard to quantify this) then that's where the problem is. Then check the other side. Two basic wear conditions occur inside the inner driver; 1)the inner driver develops "dents" on the surfaces where the bearing rollers contact or, 2)The needles in the tripod bearing rollers get damaged and/or escape. That can happen to just one, two or all three of the tripod rollers. Either of these conditions will allow the axle to move radially relative to the inner driver and create a vibration when under load. If you feel this radial play then you should pull the boot back and stick your finger in there and feel the various components (rollers and the tripod) as you shake the axle shaft. Also if you encounter any loose needles you can certify that you must now pull out the axle. If you find crusty old grease or dirt in there that's also cause to pull the axle out. Loosen the boot clamp on the inner driver, block the suspension, lift and remove the wheel, remove the axle nut (while someone stands on the brake pedal), slip the ball joints from the control arms and free the suspension link allowing the outermost axle (CV stub) to escape through the wheel bearing. Support the link on something so that the brake hose isn't stressed (alternatively remove the caliper from the link and suspend it then set the link aside). Now you can draw the axle assembly out leaving the inner driver still in the transaxle. The point of that is that you can now wipe the grease out of the inner driver and inspect it thoroughly for those dents while it's in place. Sometimes there will be a dent on only one or two of the surfaces. Any number of dented surfaces is unacceptable. Of course the deeper the dents the worse the vibration so very, very small dents may be OK for you. If the dents are only on the drive surfaces (and not the coast surfaces) some guys will put that inner driver on the opposite side of the car since it doesn't really matter much if it wants to vibrate when you are backing up. It should be pretty obvious whether the tripod bearing is reusable or not once you have wiped it clean and are looking at it. I will never reuse a tripod that has come from a worn out inner driver but if the inner driver is OK and the tripod is shot just replacing only the tripod seems to give good service. Most often both are shot when they are vibrating badly. When I fix an inner driver/tripod problem I generally open up the outer CV, clean it and repack it with fresh grease and a new boot. Otherwise you get the inner unit all nice and the next thing you know the CV is rumbling when you make a turn. Hope this helps.
posted by 198.233....
, Wed, 7 Nov 2007 05:26:54, Wed, 7 Nov 2007 07:20:15, Wed, 7 Nov 2007 08:03:28, Wed, 7 Nov 2007 09:10:44, Wed, 7 Nov 2007 12:06:02 <-- Viewing This Message, Wed, 7 Nov 2007 15:05:31, Wed, 7 Nov 2007 07:16:17
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