The rear end went out of the f250. Can't find a salvage part, only a rebuild kit. What are the steps to disassemble the rear differential?

Hello S.Easthope

It is not impossible... but I would expect the rebuild kits to at least match...

and they DO NOT.

Dana 30 or SUPER 30 FORD (2005, 2004 various options)
2005 FORD EXPLORER 4 6L V8 Differential Rebuild Kit RockAuto

FORD 8.8" IRS SUV (2006 & 2007)
http://www.rockauto.com/en/catalog/ford,2007,explorer,4.6l+v8,1434502,drivetrain,differential+rebuild+kit,18601

Carnac the Magnificent

Very expensive,labor and parts probably over 1000 dollars.............probably better to look for a used one in a relatively low mileage wrecked vehicle. don-ohio (:^)

If the rear end has a wine after a rebuild it is more than likely set up (shimmed) incorrectly. Take to a reputable mechanic who specializes in rear differentials. Some new gears will whine regardless of shim, but should be somewhat quieter than a bad rear end. If the gear pattern is correct look to the outer axel bearings.

Replace it. If the bearings are gone, then it ate the **** out of the differential also.

It alot of information to work with. No make, year, engine or transmission. Most wranglers came with a Dana 30 front differential and a Dana 35 rear. Hope this helps.

It is possible, you just have to know what gear ratio you have in your Sierra. I had issues with my son's rear differential and did the Salvage Yard and picked one up for $250.00 with less then 45,000 miles. Remember new cars end up at Salvage Yards also.

Here are the Pro code for the rear ends to your Sierra and you can match one up at a Salvage Yard.
GQ1 -- AXLE REAR, STD RATIO
GT4 -- AXLE REAR, 3.73 RATIO
GT5 -- AXLE REAR, 4.10 RATIO
GU4 -- AXLE REAR, 3.08 RATIO
GU5 -- AXLE REAR, 3.23 RATIO
GU6 -- AXLE REAR, 3.42 RATIO
G80 -- AXLE REAR, LIMITED SLIP (POSI TRACTION)

HC4 -- AXLE REAR, 4.56 RATIO

Open Your glove box and look inside it. Should be a list of codes on the bottom.
Example: GU6 G80 According to that, you'll have a 3.42 posi

Good luck and keep me posted and call around Salvage Yards, there prices will differ from one to the next salvage yard and don't ask them for a posi rear end. The cost will you more, just search all the SUV's and look at the pro codes in the glove box. Hunt, most awd system SUV will have the G80 rear end.

Good luck and keep me posted.

It is called a rear end. Your best bet is to find a good used one at a salvage lot. You should have good luck as all of the isuzu's were clunkers. Aamco will rape you!

should be on the top of the trannie, some have them internall yin the Rear end, very few but some do

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

The mechanic is right, you should fix it before the differential back there either locks up or strips teeth, in either case you will be stranded. Probably your best bet is to check out a used, complete rear end, and install it. One major precaution if you go this way, you must replace yours with the exact same ratio. There should be a tag under one of the cover bolts which will show your ratio. He is also right about rebuilding with new parts, and in addition to cost of parts, is hard to find someone who is qualified to set it up once repairs are made. Rebuilding rear ends requires special training, and many mechanics do not have it.