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Old 02-14-2012, 12:35 AM   #1
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Default How to remove and replace differential bushings

Just did this now and it works great. You need a jaw puller (I used a 4" 3-jaw puller from Advance Auto) and harbor freight ball joint press (you need this for suspension bushings anyways).

Anyways, pictures of how it all works.

You take the puller. Put a 1/2 to 3/4 adapter on it. From the ball joint tool, use the disk and 2.5" OD receiver tube.


Heat up the area with a torch for best effect. Go slowly. Check to make sure your puller doesn't come off.


Bushing comes out fairly easy and without any mess.


Use a 2.5" wire brush attachment to quickly clean up the bushing bores.



You can press the new bushings in by hand or just use the tool. easy.
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Old 02-14-2012, 01:25 AM   #2
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I loaned out my HF tool and never got it back. I wish I had it when I did this last month, it looks like it went a lot smoother for you.
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Old 02-14-2012, 08:58 AM   #3
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That's a good way to crack the diff. There is someone on here who did that and it cracked. Just sayin.
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Old 02-14-2012, 09:34 AM   #4
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All I used was a chisel and hammer and mine out in 5min.

The key was breaking the metal ring around the bushing, you hit it right at the seem and pry it inward. That relieves all the pressure and it slides out with a few hammer taps. Drilled a few holes in the bushing too, but I found the metal ring was the key.




see the one on the ground? notice how the edge is bent in? that's all there is to it.

But I dont reccommend those solid mounts...at least not with a cltuch LSD.
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Old 02-14-2012, 12:33 PM   #5
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Quote:
Originally Posted by FRT_Fun View Post
That's a good way to crack the diff. There is someone on here who did that and it cracked. Just sayin.
Hmm, good to know.
The worst case I could see happening is breaking a piece of the "lip" off, where the puller holds.

I'm just frustrated with the shops.
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Old 02-14-2012, 07:09 PM   #6
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I used an air hammer, with a decent compressor it only takes a few minutes per bushing. No need to remove the diff from the car.
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Old 02-14-2012, 07:14 PM   #7
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I like to use a torch/chisel on mine.
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Old 02-14-2012, 07:16 PM   #8
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torch is silly and unnecessary.
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Old 02-14-2012, 07:40 PM   #9
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Massive pry bar and hammer + drilling holes.
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Old 02-14-2012, 07:40 PM   #10
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Quote:
Originally Posted by soviet View Post
Hmm, good to know.
The worst case I could see happening is breaking a piece of the "lip" off, where the puller holds.

I'm just frustrated with the shops.
Yea that is what happened. The lip cracked. Think the guy welded it back on or something lol.
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Old 02-15-2012, 05:12 AM   #11
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When using the torch, is there not a risk of adversely affecting the heat treatment of the alloy of the diff?
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Old 02-15-2012, 09:58 AM   #12
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That's not what I'd be worried about. I just think the idea of a torch is silly. You can drill on the center section of the bushing easy...and a lot faster than waiting for the rubber to burn off.

Take a chisel, hit it in the sweet spot to remove the pressure, and it will hammer right out.
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Old 02-15-2012, 12:31 PM   #13
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Quote:
Originally Posted by FRT_Fun View Post
Yea that is what happened. The lip cracked. Think the guy welded it back on or something lol.
Yeah, I think lip cracking wouldn't render the diff unusable. But that's why you gotta slow. The bushing slides out slowly under pressure, not right away.

The torch is not to "burn the rubber" - it's to make the rubber softer so it slides out easier.
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Old 02-15-2012, 12:33 PM   #14
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There's still the metal ring around the edge...that's what hold the bushings in so hard...it's compressed in, decompress it by forcing the metal edges away from each other, inteasd of butt-edged tightly and you're in business.
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Old 02-15-2012, 12:46 PM   #15
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Quote:
Originally Posted by Braineack View Post
torch is silly and unnecessary.
I don't burn the bushing out. I just make it more pliable, so it wants to come out easier. The whole process is about 3 minutes start to finish per side.
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Old 02-15-2012, 12:49 PM   #16
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So you're not one of the folk here that's posted pictures of theirs sitting there blazing on fire?
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Old 02-15-2012, 01:56 PM   #17
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Quote:
Originally Posted by Braineack View Post
So you're not one of the folk here that's posted pictures of theirs sitting there blazing on fire?
LOL no. I don't understand that either. It's like my redneck neighbor who uses gas on ant hills. He thinks the gas is used so you can light the hill on fire, thus killing the ants.
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Old 02-19-2012, 08:43 PM   #18
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I used the 3 jaw puller method on mine today. I can't imagine there being an easier way to do this job.
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Old 02-20-2012, 10:52 PM   #19
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I honestly think I sprayed mine with PB Blaster and then hammered them out with a chunk of 2x4 and a framing hammer. In the great British tradition, reinstallation was reverse of removal.

Is this a corrosion thing for you guys?
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Old 02-24-2012, 01:24 AM   #20
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I'm gonna try this whenever my bushings come in. I'm actually going to try it without taking the whole diff out...we'll see how goes. Thanks for the writeup, doesn't look too bad long as i have my 1,000 ft/lb impact wrench.
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