last week I broke the pinion and spider gears in in rear end. Well Im getting a used rear end rather than rebuidling mine. Does anyone know the gear ratio on the 97 F150 xlt 4.6l 4x4. I figured they would all be the same but my tag is missing on my diff and I was told by an auto parts store that there were a couple different ones. Thanks
does anyone know is all the axles listed above are interchangable ?
theres only 2 different types of axles. whats listed above is the different gear ratios. if you're replacing the whole axle, then you'll either have a 8.8 or a 9.75. they cannot be interchanged without a different driveshaft.
It takes a bit more than just removing and installing a ring and pinion. You have to set pinion crush properly, and the lash as well. If you don't know how to do it, research it up and down before you even drain the diff. If then you feel confident you can do it all properly, then by all means go for it, if not find someone who knows how to set a ring and pinion up properly. If it's not done right you can tear new gears up in a short time. One tip I can offer is upon teardown, keep close track of which sides the carrier shims come out of. It's not extremely difficult job to rebuild a diff, but it definitely has to be done exactly right. Swapping out the whole unit is a bit more "plug and play" as long as the axle you get is in good shape.
The 8.8 is a very easy axle to rebuild not as easy per say as maybe a removable carrier unit like a 9'' is but you should be able to handle the job. You will need a press to replace the bearings and a dial indicator to set the gears and shims. May want to buy an extra crush collar to as you only get one shot with them. Plan on 6 hours for a first timer.
I highly doubt he broke the pinion without messing up the ring gear. But either way, replacing the pinion requires the new crush sleeve to be set right, and the gear lash done with a micrometer. If JUST the spiders broke, then it would be a simple spider gear swap.