This condition is typically always diagnosed as a bad ring and Pinion gear. It has been a few weeks now, and the truck seems to be suffering from the same symptoms; occationally some type of grinding/scratching noise under deceleration. I'm guessing that the pinion nut was backed off a little to begin with, and may have been part of the reason that the seal was leaking. Tightening up the pinion nut clamps all three items together (inner bearing, spacer, outer bearing). In these cases, the most frequent culprit is a loose lug nut. • A “whirring” noise while decelerating at any or all speeds is most likely caused by bad pinion bearings or loose pinion bearing preload. if the pinion nut it tightened too much, it will put too much preload on the pinion bearing and can cause a noise as well as if it is left too loose. What symptoms should I expect if the differential pinion nut is too loose? When installing the carrier, the same adjusters or shims that are used to adjust the backlash are also used to set the carrier bearing preload. If it were me I would maybe give your purchasing dealer a call and just get their opinion. The shims under outer pinion bearing affect preload. When a solid spacer and pinion nut are used, shims control pinion bearing preload. Another common problem with rack and pinion steering systems is loose steering. The recall is expected to begin in November 2012. In your last 2 posts you keep wanting to know what was the the cause of your situation.It very well could have been a bearing gone bad as suggested but if I had to guess,I would say that when you attacked this problem the 1st time the pinion nut came off very easily as it was probably already loose.From doing rears for over 20 years I would have to say that the pinion nut coming loose … The lug nuts can get loose from jarring movements or just from not being tightened when work was done on the car. If the 160 ft-lbs was not enough pre-load that may explain why it worked loose. Diagnosing Ring and Pinion Gear, Differential, Axle and Driveline Noise. Then if its loose, or Nylock you can contact Pullerguy about borrowing a tool. Tightening these up is simple and should fix the problem. The contact owns a 2004 Dodge Ram 1500. Any damaged cause by this failure should be covered under the Recall. Another common problem with rack and pinion steering systems is loose steering. I took it to a buddy of mine, so he could properly set the preload etc on the rear end when tightening the nut. Then measure the pinion preload by turning the pinion nut with an inch-pound torque wrench. Tighten the pinion nut til you fart, and then go 1/8 turn more. This could also cause damage to any bearings in the differential. Another common problem with rack and pinion steering systems is loose steering. Hey Guys, The recall from polaris states the the dealer needs to take each rzr for a one mile low speed ride to make sure that nut on the pinion does not come loose. The problem with political jokes is that they too often get elected. In these cases, the most frequent culprit is a loose lug nut. If it doesn't come off in the first mile polaris says it should be ok. The bearings seem good and the seal is not leaking. If the pinion nut had been left loose when you picked up the car you would have noticed it right away. A loose pinion nut could definitely cause premature wear on the pinion bearing as there would not be sufficient preload on the bearing to maintain proper contact with the race. In a 9.25, the crush sleeve takes the place of the shims under the outer bearing. Refer to Drive Pinion With that in mind, when the bearings are damaged it puts metal into the entire rear differential. The correct torque is once the pinion bearing has a specific pre-load on it. Cause: Many causes, including worn differential carrier bearings or pinion bearings, broken or worn differential (spider) gears, a loose pinion nut… This kind of noise is almost never caused by bad ring and pinion gears. Here are a few typical symptoms and their possible cause: Whirring noise only while decelerating at any or all speeds is most likely caused by bad pinion bearings or loose pinion bearing preload, and almost never by bad ring and pinion gears. The lug nuts can get loose from jarring movements or just from not being tightened when work was done on the car. If the rear axle pinion nut loosens, the axle can lock up and cause a loss of vehicle control and/or a vehicle crash with little warning. Just the old ones looks so fine, and the pinion nut was loose, I discarded u-joints as the suspect. The vehicle had to be towed to an independent mechanic, where it was confirmed that the pinion nut was defective. I suspect you now have some bad pinion bearings and maybe a a bad ring & pinion to boot. Notes: I'm not doubting that it is too tight now, but it was probably too loose to begin with. When a differential is set up this spacer is crushed by tightening the pinion nut; if the spacer is crushed too … Could a loose pinion nut cause bad bearings? I have a noise while accelerating at all speeds and a noise on decelerating from twenty to thirty mph. Repeat for all eight u-bolt ends (2 u-bolts or 4 ends on each side of car). As for whether or not this would be a covered item due to the recall, I do not have an answer for that. Could the pinion nut cause this? That takes time. Tightening these up is simple and should fix the problem. I'm thinking I need to take off the nut, remove the pinion flange and seal, replace the crush sleeve, and retorque the flange. Good luck. You torque the nut to specs, if the preload is wrong, you need to add/remove shims as needed from the outer pinion bearing. I have come across other hard working diffs where the pinion had loosened off, but the symptoms had always been a sudden development of diff whine rather than no whine and severe vibration. So contact Pullerguy to borrow a tool. My truck is a 1500 and I received the recall notice for the pinion nut possibly coming loose. On the flip side, if the dfferenial was run low on fluid the bearings could have worn and cause a noise as well. The pinion nut is torqued to a specific value found in the service manual. The rack and pinion assembly is an essential part of your steering. The loose steering wheel of 2004 club Car DS may be due to worn out tie rods, breaking of the pin, or worn out rack and pinion gear. Jul 23, 2014 #10. 1986 Samurai. It can also happen if the nuts’ adjustments get displaced, or the joints and the gears get dry and forcing the driver to play more with the steering. While driving approximately 25 mph, the driveshaft dropped due to a loose pinion nut and the steering seized without warning. Since the pinion nut worked loose, you can safely assume the pinion bearings and races are toast. Whirring noise only while decelerating at any or all speeds is most likely caused by bad pinion bearings or loose pinion bearing preload. The shims under the inner pinion race are what affect the pinion depth. Pulling the pinion seal is about another 5 - 10 minutes. The installer should have used a new nut, it is fround upon to re-use a pinion nut, at least it used to be. Owners may contact Chrysler at 1-800-247-9753. In my case, it was the nuts and dryness of the parts. It says that the pinion bearing may come loose causing shaft to drop and in some cases may cause rear end to lock up. When the power steering rack and pinion wear out you may notice other symptoms such as: Loose steering.
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