What are the torque specs for the pinion nut and flange bolts on a 1990 ford f350 srw differential? Does anyone have diagrams or pics of how to remove and replace the pinion seal on the same model year truck?

Replacing the pinion bearing in a 2004 BA Falcon Ute can be a complex and challenging task. Here are the general steps to follow:

1. First, raise the rear of the vehicle securely on jack stands and remove the driveshaft from the rear differential.
2. Drain the gear oil from the differential and remove the rear cover.
3. Remove the retaining bolt from the pinion yoke, and use a puller to remove the yoke from the pinion shaft.
4. Use a suitable tool to remove the pinion nut and washer.
5. Mark the location of the pinion flange relative to the pinion shaft to maintain proper gear mesh alignment when reassembling.
6. Carefully remove the pinion flange from the pinion shaft.
7. Use a bearing puller tool to remove the old pinion bearing from the pinion housing.
8. Install a new pinion bearing onto the pinion shaft using a bearing installation tool.
9. Reassemble the pinion flange, washer, and nut onto the pinion shaft.
10. Use a torque wrench to tighten the pinion nut to the proper torque specification.
11. Reinstall the rear cover and refill the differential with the recommended gear oil.
12. Reinstall the driveshaft, making sure to properly align the yoke to the pinion flange.
13. Lower the vehicle off the jack stands and test drive to ensure proper operation.

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.

170 ft.lbs is the minimum; be aware that this differential uses a crush sleeve to set the backlash and the pinion torque is what crushes the crush sleeve. If you don't set the backlash correctly you can grind up your differential gears.
8 Inch Ford Rear End Torque Specifications eHow

PINION FLANGE & OIL SEAL

CAUTION: Following procedure must be used to retain proper pinion bearing preload. Failure to follow procedure may result in premature axle assembly or component failure. Ensure pinion bearing preload is checked before disassembly, as previous pinion bearing preload will be used during reassembly.

Removal

1. Raise and support vehicle. Scribe reference mark on drive shaft-to-pinion flange on differential for reassembly reference. Remove bolts and "U" joint straps at pinion flange on differential.
Disconnect drive shaft from differential.
2. Remove rear wheels and brake drums to prevent any drag that may affect pinion bearing preload reading. Using INCH-lb. torque wrench, measure amount of force required to rotate pinion. This is pinion bearing preload. Record pinion bearing preload for reassembly reference.
3. Using Holder (6719), hold pinion flange. Remove pinion nut and washer. Scribe reference mark on pinion flange-to-pinion for reassembly reference. Using appropriate puller, remove pinion flange from pinion. Remove oil seal from axle housing.

Installation

1. Ensure oil seal surface in axle housing is clean. Coat lip of oil seal with gear lube. Install oil seal using appropriate seal installer. Drive oil seal into axle housing until oil seal installer contacts axle housing.
2. Install pinion flange on pinion with reference mark aligned. Using appropriate pinion flange installer, install pinion flange on pinion.

CAUTION: Washer must be installed on pinion with convex side of washer facing outward (away from pinion).

3. Install washer on pinion with convex side of washer facing outward (away from pinion). Install NEW pinion nut. Tighten pinion nut to 210 ft. lbs. (285 N.m). Rotate pinion several times to seat pinion bearings.

CAUTION: DO NOT overtighten or loosen then retighten pinion nut when adjusting pinion bearing preload. If pinion nut is overtightened, collapsible spacer on pinion must be replaced.

4. Rotate pinion using INCH-lb. torque wrench. Rotating torque should be equal to reading recorded in removal step 2) , plus 5 INCH lbs. (.056 N.m). If rotating torque is low, tighten pinion nut in small increments until proper rotating torque is obtained.
5. To install remaining components, reverse removal procedure using NEW "U" joint straps and bolts. Ensure all reference marks are aligned. Tighten bolts to specification. Check lubricant level and add if necessary.

1. If you are speaking of the large yoke nut there is no "torque spec" per say, instead it is a rotational preload-

From Ford manual:
Use the special tool to hold the pinion flange while tightening the nut to set the preload.

• Tighten the nut, rotating the pinion occasionally to ensure the differential pinion bearings are seating correctly. Take frequent differential pinion bearing preload readings by rotating the pinion with a Nm (inch-pound) torque wrench. The final reading must be 0.56 Nm (5 lb-in) more than the initial reading taken during removal.

2. If you are looking for the yoke straps that hold the universal in place to the yoke it is 14ft lb for the 4 bolts.

this is for 2003 7.5 inch ring gear axle. SECTION 205-02A: Rear Drive Axle/Differential — Ford 7.5-Inch Ring Gear 2003 Mustang Workshop Manual IN-VEHICLE REPAIR Drive Pinion Flange and Drive Pinion Seal Special Tool(s) 2-Jaw Puller 205-D072 (D97L-4221-A) or equivalent Holding Fixture, Drive Pinion Flange 205-126 (T78P-4851-A) Installer, Drive Pinion Flange 205-002 (TOOL-4858-E) or equivalent Removal

1. Raise and support the vehicle.

1. Remove the rear wheel and tire assemblies.

1. CAUTION: Remove the rear brake calipers to prevent drag during the drive pinion bearing preload adjustment. CAUTION: Do not allow the calipers to hang from the brake hoses. Remove the rear brake caliper and support bracket from the knuckle as an assembly. Wire the caliper and support bracket assembly out of the way.
2. CAUTION: Index-mark the driveshaft flange and pinion flange (4851) to maintain initial balance during installation. CAUTION: The driveshaft centering socket yoke fits tightly on the pinion flange pilot. Never hammer on the driveshaft or any of its components to disconnect the yoke from the flange. Pry only in the area shown, with a suitable tool, to disconnect the yoke from the flange. Disconnect and position the driveshaft out of the way.

1. Install an Nm (inch/pound) torque wrench on the nut and record the torque necessary to maintain rotation of the drive pinion gear through several revolutions.

1. CAUTION: After removing the nut, discard it. Use a new nut for installation. Use the special tool to hold the pinion flange while removing the nut.

1. Index-mark the pinion flange and drive pinion gear stem to maintain initial balance during installation.

1. Using the special tool, remove the pinion flange.

Installation

1. Inspect the pinion flange seal journal for rust, nicks, and scratches prior to installing the flange. Polish the seal journal with fine crocus cloth, if necessary.

1. Lubricate the pinion flange splines.
   • Use SAE 80W-90 Premium Rear Axle Lubricant XY-80W90-QL or equivalent meeting Ford specification WSP-M2C197-A.

1. NOTE: Disregard the index marks if installing a new pinion flange. Position the pinion flange.

1. Using the special tools, install the pinion flange.

1. CAUTION: Do not under any circumstance loosen the nut to reduce preload. If it is necessary to reduce preload, install a new collapsible spacer (4662) and nut. CAUTION: Remove the special tool while taking preload readings with the Nm (inch/pound) torque wrench. Tighten the nut to set the preload.
   • Rotate the drive pinion occasionally to make sure the differential pinion bearings (4630) (4621) seat correctly. Take frequent differential pinion bearing torque preload readings by rotating the drive pinion with a Nm (inch/pound) torque wrench.
   • If the preload recorded prior to disassembly is lower than the specification for used bearings, then tighten the nut to specification. If the preload recorded prior to disassembly is higher than the specification for used bearings, then tighten the nut to the original reading as recorded.
   • Refer to the torque specification for used differential pinion bearings in the Specifications portion of this section.

1. CAUTION: Align the index marks. CAUTION: Install the driveshaft with new bolts. If new bolts are not available, apply Threadlock and Sealer EOAZ-19554-AA or equivalent meeting Ford specification WSK-M2G351-A5 to the threads of the original bolts. CAUTION: The driveshaft centering socket yoke fits tightly on the pinion flange pilot. To make sure that the yoke seats squarely on the flange, tighten the bolts evenly in a cross pattern as shown. Connect the driveshaft. .

1. Install the rear brake calipers.

1. Install the rear wheel and tire assemblies.

1. Lower the vehicle.

here is a diagram on how to get the front pinion seal out and it does mention how to get the axle loose. please do not forget to rate and comment about your experience with fixya today.

1. Before servicing the vehicle, please familiarize yourself with safety procedures.
   
2. Remove both half shafts.
   
3. Mark propeller shaft and pinion flange for installation reference.
   
4. Remove front propeller shaft.
   
5. Rotate pinion gear three to four times, to verify pinion rotates smoothly.
   
6. Record pinion flange rotating torque with an inch pound torque wrench for installation reference.
   
7. Hold flange with Holder 6719 and four bolts and washers.
   
8. Remove pinion nut.
   
9. Remove flange with Remover C-452.
   
10. Remove pinion seal with a pry tool.
    Removing the companion flange
    Measuring pinion rotating torque
    Pinion seal installer
    Tightening the pinion nut
    

To install:

1. Apply a light coating of gear lubricant on the lip of pinion seal.
   
2. Install seal with Installer C-3972-A and Handle C-4171.
   
3. Install pinion flange onto the pinion with Installer C-3718 and holder.
   
4. Hold pinion flange with Holder 6719A.
   
5. Install new pinion nut and tighten nut until there is zero bearing end-play.
   
   CAUTION Do not exceed the minimum tightening torque when installing the companion flange at this point. Damage to the collapsible spacer or bearings may result.
   
6. Tighten pinion nut to 271 Nm (200 ft. lbs.).
   
   CAUTION Never loosen pinion nut to decrease pinion bearing rotating torque and never exceed specified preload torque. If preload torque or rotating torque is exceeded a new collapsible spacer must be installed.
   
7. Record pinion flange rotating torque, with a torque wrench. Rotating torque should be equal to the reading recorded during removal plus an additional 0.56 Nm (5 inch lbs.).
   
8. If rotating torque is low, tighten pinion nut in 6.8 Nm (5 ft. lbs.) increments until rotating torque is achieved.
   
   CAUTION If maximum tightening torque is reached prior to reaching the required rotating torque, the collapsible spacer may have been damaged. Replace the collapsible spacer.
   
9. Install propeller shaft with reference marks aligned.
   
10. Install half shafts.
    

here is a diagram on how to replace the front pinion seal.
please do not forget to rate and comment about your experience with fixya.

1. Before servicing the vehicle, please familiarize yourself with safety procedures.
   
2. Remove both half shafts.
   
3. Mark propeller shaft and pinion flange for installation reference.
   
4. Remove front propeller shaft.
   
5. Rotate pinion gear three to four times, to verify pinion rotates smoothly.
   
6. Record pinion flange rotating torque with an inch pound torque wrench for installation reference.
   
7. Hold flange with Holder 6719 and four bolts and washers.
   
8. Remove pinion nut.
   
9. Remove flange with Remover C-452.
   
10. Remove pinion seal with a pry tool.
    Removing the companion flange
    Measuring pinion rotating torque
    Pinion seal installer
    Tightening the pinion nut
    

To install:

1. Apply a light coating of gear lubricant on the lip of pinion seal.
   
2. Install seal with Installer C-3972-A and Handle C-4171.
   
3. Install pinion flange onto the pinion with Installer C-3718 and holder.
   
4. Hold pinion flange with Holder 6719A.
   
5. Install new pinion nut and tighten nut until there is zero bearing end-play.
   
   CAUTION Do not exceed the minimum tightening torque when installing the companion flange at this point. Damage to the collapsible spacer or bearings may result.
   
6. Tighten pinion nut to 271 Nm (200 ft. lbs.).
   
   CAUTION Never loosen pinion nut to decrease pinion bearing rotating torque and never exceed specified preload torque. If preload torque or rotating torque is exceeded a new collapsible spacer must be installed.
   
7. Record pinion flange rotating torque, with a torque wrench. Rotating torque should be equal to the reading recorded during removal plus an additional 0.56 Nm (5 inch lbs.).
   
8. If rotating torque is low, tighten pinion nut in 6.8 Nm (5 ft. lbs.) increments until rotating torque is achieved.
   
   CAUTION If maximum tightening torque is reached prior to reaching the required rotating torque, the collapsible spacer may have been damaged. Replace the collapsible spacer.
   
9. Install propeller shaft with reference marks aligned.
   
10. Install half shafts.
    

remove the drive shaft at the pinion flange move it out of the way, then remove the pinion flange on the differential nose, the seal is under that, replace the seal and repalce the pinion flange nut, torque to 50 foot pounds and stake the nut like the old one, this is bending the lip of the nut over to lock it in place.

Differential bearing caps 70-85 ft lb
Ring gear bolts 70-85 ft lb
Pinion bearing preload if using original bearings 8-14 lb-in, if installing new bearings 16-28 lb-in