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coullstar
Nürburgring


Joined: 15 Sep 2015
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PostPosted: Mon Sep 11, 2017 9:26 am    Post subject: Diff swapping / rebuild? Reply with quote

How difficult is it swapping out diff's on a C2?

Also has anyone rebuilt their factory diff, if so who did it and how much?
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Gixxer996
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PostPosted: Mon Sep 11, 2017 10:14 am    Post subject: Reply with quote

Never done it on one of these, but looks pretty straight forward. Although the vid bellow is 997 should be very similar.


https://www.youtube.com/watch?v=pU0M5mrlTvc
 
  
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coullstar
Nürburgring


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Posts: 492
Location: Aberdeen/Torphins


PostPosted: Mon Sep 11, 2017 10:26 am    Post subject: Reply with quote

Apologies I should have searched.

Good info in these posts

http://911uk.com/viewtopic.php?t=118042&highlight=lsd

http://911uk.com/viewtopic.php?t=101673

Would still like a cost if known for factory rebuild or if anyone has gone with the guard upgrade from the US?
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cheshire911
Paul Ricard


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PostPosted: Mon Sep 11, 2017 4:13 pm    Post subject: Reply with quote

I'm guessing that you'd need specialist equipment to set up a diff rebuild properly. I'd also guess that a rebuild would be a better option than buying an unknown scrap car replacement that may also have wear and tear.

For pricing ask a good Indy. Try Mike at Sports & Classic. He does diff work as well as gearbox rebuilds. I'm guessing it ain't going to be cheap though.
Depending on mileage (that you don't mention in the post) there may well be a lot of other wear n tear items that need replacement - and Porsche have put up the prices of many of their gearbox and diff parts.
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Jamesx19
Monza


Joined: 10 Jul 2015
Posts: 189
Location: Brighton


PostPosted: Mon Sep 11, 2017 7:21 pm    Post subject: Reply with quote

I had a similar thought and emailed Guard Transmissions in the USA. Here was their reply:

Quote:
Hello James,

Thank you for your interest in our products. We do make a kit to rebuild your GKN LSD. It runs $1800 and is comprised of replacement clutches and 40/60 ramp pressure rings similar to what one would find in a Cup Car. The parts are in stock. I would expect shipping to be around $100.

Regards,

Matt Monson
Guard Transmission LLC
970-669-7144


Obviously you then need to factor in labour costs etc.

Or of course there is Wavetrac or Quaife. Both of those are Torsen type diffs rather than LSD plate type.

Cheers James
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coullstar
Nürburgring


Joined: 15 Sep 2015
Posts: 492
Location: Aberdeen/Torphins


PostPosted: Mon Sep 11, 2017 9:34 pm    Post subject: Reply with quote

Jamesx19 wrote:
I had a similar thought and emailed Guard Transmissions in the USA. Here was their reply:

Quote:
Hello James,

Thank you for your interest in our products. We do make a kit to rebuild your GKN LSD. It runs $1800 and is comprised of replacement clutches and 40/60 ramp pressure rings similar to what one would find in a Cup Car. The parts are in stock. I would expect shipping to be around $100.

Regards,

Matt Monson
Guard Transmission LLC
970-669-7144


Obviously you then need to factor in labour costs etc.

Or of course there is Wavetrac or Quaife. Both of those are Torsen type diffs rather than LSD plate type.

Cheers James


So once import duty etc is taken into account it's probably about £1800!!
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alex yates
Shanghai
Shanghai


Joined: 06 Mar 2014
Posts: 10777
Location: Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Tue Sep 12, 2017 8:34 pm    Post subject: Re: Diff swapping / rebuild? Reply with quote

coullstar wrote:
How difficult is it swapping out diff's on a C2?

Also has anyone rebuilt their factory diff, if so who did it and how much?


Are you talking standard factory diff. or LSD? My standard factory munched the internal gears. Had it rebuilt with new gears and bearings. Not a big job - I did a thread on it on here.......somewhere.
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alex yates
Shanghai
Shanghai


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2000 Porsche 996 Carrera 4

PostPosted: Tue Sep 12, 2017 8:38 pm    Post subject: Reply with quote

Here: 911uk.com/viewtopic.php?t=101970
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coullstar
Nürburgring


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PostPosted: Tue Sep 12, 2017 8:39 pm    Post subject: Reply with quote

Long story short I'm looking at a car that had a noisy box with factory LSD.
It's been replaced with a lower mileage box with STD diff it seems. LSD is still in old box so wondered about rebuild then swap into new box.
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alex yates
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PostPosted: Tue Sep 12, 2017 8:41 pm    Post subject: Reply with quote

Should be easy enough if the person doing it knows what they're doing.
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infrasilver
Fast & Furious
Fast & Furious


Joined: 04 Oct 2010
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Location: East Midlands

2001 Porsche 996 Targa

PostPosted: Tue Sep 12, 2017 8:48 pm    Post subject: Reply with quote

I removed my diff once with the car on axle stands and it was reasonable easy. I have also stripped down an LSD which is easy too as long as everything goes back as it should, the worst thing would be torquing the crown wheel bolts back up as it's hard to mount the diff securely enough to get enough torque onto the bolt without it moving, there is a special tool for this. You will have seen the thread I started above which has some good info in it.
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