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Re: Rear whining when I let off the gas pedal. just had...
Pinion gear needs to be adjusted OR bad bearings. Was this a USED unit? Check YouTube for a video titled "How to set up a pinion gear in a differential".
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if your mecanic replace the ring and pinion and the whining noise is theare again you have a big problem your mecanic dont know how to adjust the rear end the adjusment betwen the ring and pinion its critical to the llife of the rear end have a good look
If its a 4x4 remove rear drive shaft from vehicle, remove large nut (pinion nut) at front of diff which is generally hidden when driveshaft is in place. with a bearing puller remove pinion bearing replace with new one, install new pinion seal reinstall pinion cover and pinion nut tighten to specified torgue reinstall driveshaft check diff oil for proper amount
yes it is very possible. to confirm where your leak is, look in 4 places. 1) rear diff cover..... 2)pinion seal, where your driveshaft goes into the rear end, or axle seals, just look and see if there is any fluid on the inside of your tires.
Could be the pinion gear ,,Has it been leaking rear end oil? How many miles on this?Probly over a 100k? its old enough for it to start wearing out.Try changeing the rear end oil use Lucas.
if the sounds is comming from the rear sounds like crown and pinion is worn out , the crown and pinion in the rear diff will only hum or whine under load while in contact and when you let go the pedal there is no load equalling no noise. you can replace the crown and pinion but you do need some specialty tools like dial guages and spreaders and pinion depth guage
Well you can remove the sensor in the diff and make sure that looks ok they g obad quiet often also woulnd not hurt too remove the rear diff cover and inspect the rear end if it is whining and you dont see anything wrong i would refill it with lucas oil/grease and start praying check the pinion too and see if it has any play in it
just yank it up tight with a bar about 50cms long,their should be collapsable spacer between the taper bearings just tighten it like a professional without overtightening it so and shearing something .handfull of grease in the diff casing to slow/stop any oil leaks top up with ep 90 and away you go,the crownwheel to pinion setting is just a little wiggle woggle ,or you could use a dial gauge but its quicker and easier ,too tight and it whines and too much play and it clunks,nice little wiggle woggle and it will work fine .trust me
check your rear diff vent if pluged clean it out and clean up the pinion seal.sometimes if the leak is caused by pluged vent and has not been leaking long once vent is clean sometimes the leak will stop.there is not a specific torque amount because it is rotational torque(how hard to turn pinion).there is a crush sleve on the pinion and if torqued too tight or too loose brg preload will be wrong and brg damage could result.mark and remove drive shaft.remove rear wheels,brakes,axles.so when turning pinion you dont have any drag from brakes or axles.mark the position of the yoke on the pinion.remove yoke,replace seal,reinstall yoke be sure to replace pinion nut.tighten nut until it takes the exact same amount of force to turn pinion as before taking original pinion nut off.hope this helps.
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