differential

[BLACKMARAUDER04]

My differential needs replacing. Any one have one for sale?
Most everyting inside needs repalcement.

[Motorhead350]

Go to a junkyard and buy a complete rear end from a 2008+ crown vic. You will have 31 spine axels... it will be an upgrade, especially if you need nearly everything. I could be off on the year. Maybe 2006+?

[RF Overlord]

Mid-year 2005 was the switch to 31-splines.

[lifespeed]

I would never advise to pay good money for junkyard parts! A fender, sure, but not moving parts that wear like the differential. You can buy a brand-new Ford Racing diff in the low $300 range. But you'll need axles and bearings too as they are as old as the rest of the axle and worn and got hit with debris. May as well get 31 spline at this point, there is no cost savings with 28 spline.

It is not a cheap job. Probably all you can salvage is the ring and pinion, but check that too. As old as these cars are there are many folks who are finding out how long the axle lasts. Do it right, do it once (every 100K - 150K miles, anyway). Good luck.

[fastblackmerc]

The housing is usually good, just replace everything inside if needed. Good time to switch to 31 spline axles as mentioned.

[jaywish]

If you can find a low mile K code rear 3.55/posi in a yard that is good.

As was said you could probably reuse the ring, pinion and even the carrier. Basically just a bearing and clutch job if the axles are good.

Otherwise if the car is good and you can afford it, replace, axles and carrier(31 spline) plus gears and bearings.

I really should ask why do you say your differential needs replacing?

[SpartaPerformance]

If you're stock no need to upgrade to 31 spline. PM me with ya you need, I'll get you prices.

Tommy

[myrodr]

all cars run with used parts. if you do use junk yard parts check them out or have some one you trust that knows what to look for.

[lifespeed]

all cars run with used parts. if you do use junk yard parts check them out or have some one you trust that knows what to look for.

LOL! It's all shades of grey, isn't it? The "used" parts in my rebuilt axle have 10K on them, wearing at about 12K/year. So I can easily get 6 - 8 years out of them, if not more.

I stand by what I said. Used axle parts are false economy unless you're truly desperate.

[lifespeed]

Basically just a bearing and clutch job if the axles are good.

Not very common for axles to be "good". These things wear out and no amount of wishful thinking is going to fix it. New parts bought with cold cash will do the trick, though.

[Curless]

Just get a hold of Tommy at Sparta, thats where we buy all of our gears and carrier
parts!

[vkirkend]

I have a carrier and axles for sale in the for sale section w/ 65,000 miles on them. Changed due to upgrade.

[lifespeed]

I have a carrier and axles for sale in the for sale section w/ 65,000 miles on them. Changed due to upgrade.

I have looked through the classifieds on occasion. I am always surprised at the amount of run-out stock parts offered for sale: 100K mile air springs, used suspension parts, etc. I wouldn't put that stuff in my car if you gave it to me for nothing, paid to ship it to my house, and installed it for me!

At 65K miles the limited slip clutches are gone, and I'll put money on the axle bearing surfaces being well worn. IMO, axles don't even last 100K miles, so you're more than 2/3 of the way through their useful life. I'll bet when you put new axles in the rumbling noise from the axles/bearings quieted down.

Who in their right mind would pay for worn-out parts, pay to ship, replace the clutches, spend time and money to install, only two end up with two years life left (at most) on the axles? :rolleyes:

[Marauderjack]

At 65K miles the limited slip clutches are gone, and I'll put money on the axle bearing surfaces being well worn. IMO, axles don't even last 100K miles, so you're more than 2/3 of the way through their useful life. :rolleyes:

Not necessarily true......my axles lasted to 150K+ and I still have the original LSD clutches and spring that work fine at 250K.....it all depends on how you treat stuff....IMHO!!??:cool:

I do not do Burnouts........but quite frequently blast through 1st gear and sometimes pretty deep into 2nd!!:beer:

Been doin' the :burn: pretty damn well for almost 10 years now!!;)

[lifespeed]

Not necessarily true......my axles lasted to 150K+ and I still have the original LSD clutches and spring that work fine at 250K.....it all depends on how you treat stuff....IMHO!!??:cool:

I do not do Burnouts........but quite frequently blast through 1st gear and sometimes pretty deep into 2nd!!:beer:

Been doin' the :burn: pretty damn well for almost 10 years now!!;)

No doubt there is some variation in how long these things last for different people and vehicles.

That said, I'll bet that if you were to replace your clutches today you would notice much-improved positraction action. The LSD clutches are widely regarded to last about 50K - 70K miles at most. There are a lot of people out there running the 8.8 Ford so this is not exactly uncharted territory.

As to the axles, I'm sure you noticed the rumble disappeared after you replaced them. So, at what mileage were they "bad"? I replaced mine at 96K and the new axles were much quieter. Are they only "bad" after they have spewed metal shavings and made the seals leak?

Would you install 65K axle parts in your car?

[jaywish]

A junkyard housing striped and refinished with all new usa made parts inside and new brakes outside, plus new control arm bushings, might as well do the air springs and shocks while you are there, is the best way to go granted the build goes well.

This is the most expensive way, and they way I would usually like to go myself, not everyone is setup to do it that way.

Many individuals with older fords do fine with new bearings, clutches and maybe new or used, excellent condition, axles. (hint the left axle is usually in much better condition than the right axle, especially on open diff cars)

We still don't know what is wrong with the original rear in this thread.

Incidentally I do not know where you can easily get a new Ford 28 spline carrier, as far as I know Ford racing stopped making them a couple of years ago. I was lucky and found a NOS for my wagon rear rebuild.

[Marauderjack]

No doubt there is some variation in how long these things last for different people and vehicles.

That said, I'll bet that if you were to replace your clutches today you would notice much-improved positraction action. The LSD clutches are widely regarded to last about 50K - 70K miles at most. There are a lot of people out there running the 8.8 Ford so this is not exactly uncharted territory.

As to the axles, I'm sure you noticed the rumble disappeared after you replaced them. So, at what mileage were they "bad"? I replaced mine at 96K and the new axles were much quieter. Are they only "bad" after they have spewed metal shavings and made the seals leak?

Would you install 65K axle parts in your car?

As far as axles....see post #14.....new bearings and seals at 177K miles.......LSD was fine then and still is I guess 'cause it still does the "Two Stripe" like always!!:bows: BTW, I have had 5 CV's over the years and ran them all to around 200K miles so I am very familiar with worn axle noise and yes the Marauder was doin' the "Wump...Wump...Wump" pretty damn good!!:(

Probably would not install used axles if I could afford new but if they look good with no bearing ridges and $$$'s were tight......I would!!:cool:

[BLACKMARAUDER04]

Well my axels looked real good. Everything else had to be replaced.
Total was about $2000 including labor.

[lifespeed]

Well my axels looked real good. Everything else had to be replaced.
Total was about $2000 including labor.

Congrats, I bet the new limited slip feels nice! I paid about $1200 w. labor for new everything except ring and pinion. My axles were not worn real bad, but they had a ridge where the bearing rolls. Replacing them did quiet the worn-axle-rumble, and the new LSD was very noticeable.

Old cars can be expensive.

[jaywish]

What did you use for a new carrier?

[lifespeed]

What did you use for a new carrier?

Ford Racing.

[jaywish]

Really? where did you get it? I would really like to know. Maybe you used 31 spline axles? Perhaps it was done several years ago?


Blackmarauder04, What differential did you use, I could really use the info.



Thanks Guys.

[steve fox]

Eaton Tru Trac

[justbob]

Anyone who gets more than 40,000 miles out of their clutches should have their keys taken away.


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