Rear end trouble

[Coon hunter]

New here, but many of the things I google lead me here and I usually find the info I’m looking for. Seems you guys have done most everything. For the same couple reasons I keep sticking with this 03 explorer. There are a few things they did right. But repairs can be challenging. Now my rear end seams to be locked in positrack. Not in 4x4. Curious how bad this ones going to ding me.

 

[imp]

New here, but many of the things I google lead me here and I usually find the info I’m looking for. Seems you guys have done most everything. For the same couple reasons I keep sticking with this 03 explorer. There are a few things they did right. But repairs can be challenging. Now my rear end seams to be locked in positrack. Not in 4x4. Curious how bad this ones going to ding me.

By locked in positrack, you mean one wheel cannot be made to slip by attempting to rotate it while up off the ground with the weight of the car on the other wheel? It may take 200+ ft-lbs to rotate it. If it absolutely is locked to the other wheel, the only way I can see that happening is the presence of broken parts within the differential gear cavity.

 

[Mbrooks420]

Why do you think your limited slip is stuck?

Minimum break away on the 8.8 is 20ft/lbs. yours will likely be a similar spec. Jack up one wheel and try a torque wrench to spin it.

Your value will be slightly lower since you are on a lug, and not the center of the bolt circle. (Extra leverage)

 

[imp]

Why do you think your limited slip is stuck?

Minimum break away on the 8.8 is 20ft/lbs. yours will likely be a similar spec. Jack up one wheel and try a torque wrench to spin it.

Your value will be slightly lower since you are on a lug, and not the center of the bolt circle. (Extra leverage)

Yes, 200 lb-ft would be high in most cases, though I've seen other differentials go 150+ lb-ft with new clutch plates and springs. 50 is Ford's usual acceptability number when new.

 

[Mbrooks420]

Yes, 200 lb-ft would be high in most cases, though I've seen other differentials go 150+ lb-ft with new clutch plates and springs. 50 is Ford's usual acceptability number when new.

This is also just a testing number, and not the ft/lbs it’ll deliver, as you are probably well aware of. This test checks the clutch packs under the spring tension only, where as when being driven by the driveshaft the spiders put pressure on the pack, and you technically don’t even need that spring in there at all.