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Leaking rear differential
Posted on 8/31/15 at 4:19 pm
Posted on 8/31/15 at 4:19 pm
So, the rear differential is leaking in my truck. It's enough to produce a very slow drip and a spot on the ground. The truck is an 06 ford f150 and has 120000 miles. How much is this going to cost to fix? Am I screwed? Is it time to trade in ole Silver?
4
Posted on 8/31/15 at 4:24 pm to ZacAttack
Where is it leaking at?? If it's just the cover you can get and/or make a gasket outnof permatex. If it's from the sides to your hubs its an axle seal and can be more complex. If it's the front its a drive shaft seal. Locate the leak and we might could help ya!
Posted on 8/31/15 at 4:27 pm to ZacAttack
I believe leaky pinion seals are fairly common on those trucks.
Posted on 8/31/15 at 4:42 pm to ZacAttack
First mod to any truck should be a rear diff cover that has drain and fill plugs if it didn't come from the factory that way. Pinion seals leak, so do crappy stamped-steel diff covers unless you've taken the time to put better RTV on them. If it's leaking enough to put a spot then it's not a pinion leak, that seal is higher than the normal oil level. Unless the factory seal for the diff covert was perfect then it will eventually leak, diff oil is like ATF in that it finds the tiniest gaps in any gasket. I put a Mag-hytec on my F150 and a TA cover on my Ranger, no leaks and I can change the oil out in 10 minutes.
Posted on 8/31/15 at 5:09 pm to thejudge
it's at the front by the drive shaft
This post was edited on 8/31/15 at 5:09 pm
Posted on 8/31/15 at 5:18 pm to ZacAttack
Can you remove the yoke and replace seal from the outside? Your bearing isn't bad is it?
Posted on 8/31/15 at 5:28 pm to ZacAttack
Is your's a 9.75" Sterling or a 8.8"? I think the 9.75's can be replaced after removing driveshaft and input flange as long as you have a gear puller.
Posted on 8/31/15 at 5:38 pm to Clames
Unfortunately I've just moved and don't have any of my tools with me, which sucks because I have several gear pullers, jacks, stands etc. So, I'm probably going to have to take it to the mechanic, any idea how much it'll cost me? 
Posted on 8/31/15 at 9:18 pm to ZacAttack
Book time for a shop is around 1.5 hours plus the part. Make sure you get a motorcraft pinion seal. They seem to hold up better and we always have less people coming back when we use them instead of a autozone or Napa brand. Normal labor rare is gonna run you $90-$110 per hour.
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