Tork specks for the pinion nut on a 10 1/4 rear end from a 97 f250 hd

To install the rear pinion shaft on a 2019 Ford F-150, you will need to follow the steps outlined below:

1. First, make sure that the vehicle is supported securely on a lift or jack stands.
2. Remove the rear differential cover and drain the oil.
3. Remove the driveshaft and the axles.
4. Unbolt the pinion flange from the pinion shaft.
5. Remove the pinion nut and the crush sleeve from the pinion shaft.
6. Remove the old pinion shaft and replace it with the new one.
7. Reinstall the crush sleeve on the pinion shaft and install the pinion nut.
8. Tighten the pinion nut to the specified torque using a torque wrench. The torque specifications for the pinion nut will vary depending on the specific model of your Ford F-150.
9. Reinstall the driveshaft and the axles, and refill the differential with oil.
10. Finally, install the rear differential cover.

To set the inch lb setting on the pinion nut, you will need to use a torque wrench that is capable of measuring in inch lbs. To do this, first set the torque wrench to the desired inch lb setting and then tighten the pinion nut until the wrench clicks to indicate that the desired torque has been reached.
The final torque on the pinion nut will depend on the specific model of your Ford F-150 and the torque specifications provided by the manufacturer. It is important to follow the manufacturer's torque specifications to ensure that the pinion nut is tightened correctly and to prevent damage to the vehicle.

The best way is to use a new crushable sleeve between the pinion bearings,use red lock tight on the pinion nut and tighten the pinion nut until all side play is removed from the pinion bearings then tighten the pinion nut just a hair more.The rotation resistance should feel about 15inch/lbs,just a slight drag with NO side play.

If you are talking the rear pinion seal, it isn't too bad at all. You just have to drop the drive shaft, remove the pinion nut and pull the pinion, then knock out the old seal and hammer in the new one. Going back together is just the reverse but you have to torque the pinion nut to the specified setting. As long as you are not removing the pinion gear you do not need to worry about setting the rear end up or worry about the crush sleeve.

There is no torque specs,this nut has to be tightened back like it was ,the best thing to do,was,to late now,is to use a torque wrench to remove the nut,and remember the torque,and when replacing it,torque it back to that spec,the reason being,there is a crush sleeve between the front pinion bearing ,and the rear pinion bearing,and it has to be crushed to a certain amount,to acquire deepness into the ring gear,anyway just give it about 25 lbs torque,any more the crush sleeve will crush even more and the deepness of the pinion will be too much.

NEW BEARING PRELOAD SHOULD BE 20-25 INCH POUNDS. USED BEARING PRELOAD TORQUE 10 - 15 INCH POUNDS.

Axle retaining nut torque spec is 55 to 60ft lbs. back off 5(new) or back off 8(used) clicks, and axle retaining bolts 60-80ft lbs in criss cross pattern.

It is the pinion yoke flange to the driveshaft. NO you can not cut it off. A large nut in the middle of it has to be removed. The nut attaches to the pinion driven gearand if cut off a new gear will be needed

Axle Preload and Backlash Specifications 8.0 Axle Preload and Backlash Specifications Application
Specification
Metric
English
Backlash
0.08-0.25 mm
0.003-0.010 in
Backlash (Preferred)
0.13-0.18 mm
0.005-0.007 in
Pinion Bearing Preload, New Bearings
1.7-3.4 N·m
15-30 lb in
Pinion Bearing Preload, Used Bearings
1.1-2.3 N·m
10-20 lb in
Pinion and Differential Case Bearing Preload, New Bearings
3.4-6.2 N·m
30-55 lb in
Pinion and Differential Case Bearing Preload, Used Bearings
2.8-5.1 N·m
25-45 lb in

depends on rear axle you have
Dana 80 pinion nut torque is 470 ft lb pionion brg pre load is 25-45 in lb
Dana S110 pinion nut torque is 832 ft lb pinion brg pre load is 20-40 in lb
Dana S135 pioion nut is 800 ft lb and pinion brg pre load is 10-40 in lb

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.