Spec sheet: -



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Yea, could easily be the carrier as well. Rear gears are 10.50. Not sure which 10.50 rear end you have, "exactly". Here's a little on the rear ends,~

Differential Check — Ford Traction-Lok® Road Test (Ford)

Place one wheel on a dry surface and the other wheel on ice, mud or snow.
Gradually open the throttle to obtain maximum traction prior to break away. The ability to move the vehicle demonstrates correct performance of a Traction-Lok® rear axle assembly (4006).
When starting with one wheel on an excessively slippery surface, a slight application of the parking brake may be necessary to help energize the Traction-Lok® feature of the differential. Release the brake when traction is established. Use light throttle on starting to provide maximum traction.
If, with unequal traction, both wheels slip, the limited slip rear axle has done all it can possibly do.
In extreme cases of differences in traction, the wheel with the least traction may spin after the Traction-Lok® has transferred as much torque as possible to the non-slipping wheel.

Differential Check — Tractech® Truetrac®

Shift the transmission into NEUTRAL.
Raise and support the vehicle. For additional information, refer to Section 100-02 .
Spin either rear wheel.
Both wheels must spin with a fluid motion. Any feeling of gripping and release/roughness indicates that further inspection of the axle assembly is necessary. For additional information about axle disassembly and inspection, refer to Section 205-02A or Section 205-02B .
Shift the transmission into gear.
Spin either rear wheel.
The other wheel must spin with a fluid motion in the opposite direction and at the same speed of the wheel being spun. Any feeling of gripping and release/roughness indicates that further inspection of the axle assembly is necessary. For additional information about axle disassembly and inspection, refer to Section 205-02A or Section 205-02B .

Differential Check — Powr-Lok® Road Test (Dana)

Drive the vehicle for at least ten miles to warm up the axle lubricant.
More miles may be necessary depending on the outside temperature.
Drive the vehicle in a tight circle for five minutes and then in the opposite direction for another five minutes.
Make a minimum of ten figure eight turns.
If chatter is still present, drain and refill the axle with the specified type and amount of lubricant and friction modifier. For additional information, refer to Specifications in this section.
Perform the road test again.
There might be a slight chatter. If the chatter persists after 160 km (100 miles) of vehicle operation, install a new differential.

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I believe the Carrier = Same as "Mid Shift Bearing".

 

That's what I got as well from my searches. I think I am just going to get one off of Flea-Bay they are $58 and free shipping and put in my self this weekend.

http://cgi.ebay.com/ebaymotors/?cmd=...K%3AMEWAX%3AIT

 

do you feel the vibe through the steering wheel or more through the floor/under your feet?

 

Pat, I feel it through the pedal and my butt more than I feel it through the steering wheel.

 

Yea, I bet it could stand a new bearing and a rear fluid change regardless.

I'd clean the slip yoke w/brake fluid then re-grease. Grease it very thin w/a Teflon type.

I still think it's the rear gear fluid myself. Use the correct spec oil and 8 oz's of modifier. You shouldn't need a gasket, Ford doesn't use them on the cover. Permatex "Black" works great.

Is that a dually?

 

It's a SRW, the slip yoke was greased at the dealer last week and I will change the rear diff fluid. I don't know if I will get to it this weekend or not now my dad want's to move his four post lift and his project car over to his new house. I will get pics because you won't believe how we do it.

 

Four post ? A stationary set up or on wheels ? Hydraulic or Air ? Tonnage ?

Probably depends how long the ram cylinder is, or pipe sections. Everything else comes apart.

 

sounds like you're chasing down something in the back half of the truck, if its front axle you tend to feel it in the wheel more.

I'd look at the carrier bearing before anything else

 

It's a 7k hydraulic and has the ability to put casters on it and roll it around. We move it hole..........

 

Will do Pat, I think it's been there a while and I never felt it due to the BFG TKO's getting to the end of their tread life and wearing funny and now that I have new tires bam!!!! I have a vibration. I think part of it may also be the 4in straight pipe droning at 55 and it looks like I need to losen the V clamp on the down pipe and push the exhaust over a little because I have a small rub mark from a bolt on the trans cross member that looks fairly new. I noticed that last night when I crawled under the truck when I got home.

 

Rear end fluid, 90% positive now. As it worsens, and if it hasn't happened already, the LS or clutch pack slips enough to notice when turning ,- sharp right or left while giving it fuel.

 

Now that you metion it, I have noticed something that felt like drive line bind when you have the truck in 4x4 during tight turns. I just blew it off because it did not do it all the time.

 

do you have rubber isolators and or any flex tube in the exhaust? Just curious, not blaming it

 

Pat, yes all the rubber isolators are in place that came with the truck and there is no flex tube in the system at all.