How much torque to tighten the yoke retainer nut on a 1966 Ford Mustang 8 differential?

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.

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

if you have never done one its best to take to dealer because you have to remove drive shaft and then rear pinion nut and remove seal the tricky part is you have to buy new crush sleeve and thats what sets your pinon depth so that pinion rides in middle of ring gear its called setting your pinion depth if over tighten will hurt bearings and or ring gear and if under tighten will be verry noisey and cause ring and pinion failure best to let someone with special tools and knows what thier doing i use to do all chevy diff at my old dealer your use inch torque wrench to measure the drag on pinion nut and then use 1/2 inch impack to tighten the nut people freak because impack is rated at 600 ft pds but your using inch torque wrench to check drag not how tight nut is good luck

There are two places it can leak from. The rear differential cover or the pinion seal at the front of the differential. Both are easy to replace. The pinion seal will require a little more labor than the differential cover plate. You will have to remove the drive line and then break the pinion nut loose. Use a good impact wrench for this and a six point socket for that step. Then you will need to remove the yoke from the pinion gear. Should be able to tap it off. If not use a puller. Remove the old pinion seal with a flat tip screw driver by driving it through the lip of the old seal and push the screwdriver to the side and it will pop out. Clean the hole for the new seal. install the new seal and the yoke. Tighten the pinion nut. You will need to get access to a manual to check the bearing preload on the pinion nut. Then use a torque wrench to check for correct bearing preload. Re-install the drive line.

Remove the driveshaft. You need an impact gun to remove the pinion yoke nut. Pull the yoke out and replace the seal. Make sure you tighten the pinion nut to the correct torque spec. (The dealer can tell you how tight it needs to be.)

put flat pan under the housing remove the bolts holding the cover usually 10 or 12 (1/2 or #12 metric) bolts? allow the rear end grease to drain... then scape off the old gasket clean with brake cleaner spray install either new gasket or form one with oil resistant silicone put the cover back on , dont refill the fliud for at least 12 hours if using silicone. Also check the front driveshaft rear end yoke seal....they sometimes leak making the illusion of a rear end pan cover leak...if that is leaking you remove the shaft carefully...remove the large yoke retaining nut, replace the press in seal...be sure retaining yoke nut is properly torqued when reinstalling .

You probably have the 9 inch differential. If it is a rear wheel seal remove the tire and wheel assembly. Be sure to use a jack stand so you don't have the vehicle fall on you. Remove the 4 retaining bolts that hold the backing plate onto the housing. Pull the axle from the axle tube. It may be stubborn at removal. If it is the pinion seal remove the drive line. Remove the pinion nut that rests inside the yoke. Try to use an impact tool for easy removal. Once the nut is off the yoke willcome off. You may need a puller to help in removal. One the yoke is off remove the pinion shaft seal. Replace with a new seal. install the yoke and the washer and then the pinion nut. Re-torque the pinion nut to 150 foot pounds.

Put it together without the seal in place, you may have to take it apart again. You want to have about 8-10 inch pounds of preload on new bearings, less on used probably just a light drag. I recommend using a 3/4 in drive socket and ratchet and you have to hold the yoke somehow, a pipe wrench works but it's kind of crude. Put a little oil on the bearings and on the threads, if you have a new nut, save it for your final assembly. It's best to have helper because you really have to pull on the wrench to get the crush started. Once the sleave starts crush it gets easier, tighten the nut until the the end play is gone, check it frequently and spin it occasionaly as you tighten the nut. Once the free play is gone and the pinion still spins freely carefully continue to tighten the nut until you feel drag on the shaft. You need a dial type inch pound torque wrench to check the preload not a click type. If you don't have a torque wrench you can do it by feel it should take a little effort to turn the shaft you should be able to turn it by hand. Once you confident you have the right preload you may want to put the ring gear in and check the backlash and wear patern. If you are just replacing the bearings you shouldn't have any trouble. If you are changing the gears you could run into all kinds of problems and may need to seek a pro to help. If the gears are not set up right they will make noise and the gears won't last. Once you sure you have everthing right remove the pinion nut and yoke and put in the new seal. Clean the oil from the threads with brake parts cleaner and put some blue lock tight on the thread. Install the yoke and the new nut using care not to crush the sleave anymore but, at the same time make sure it's tight. I hope this helps, good luck.

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.