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> How much are limited slip differentials?
grantsfo
post Apr 30 2006, 02:55 PM
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Curious how much are limited slip diffs and where can one find one? Does it require dropping of tranny to install one?
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d914
post Apr 30 2006, 03:21 PM
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$1500..!!
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rick 918-S
post Apr 30 2006, 03:24 PM
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QUOTE(grantsfo @ Apr 30 2006, 12:55 PM) *

Curious how much are limited slip diffs and where can one find one? Does it require dropping of tranny to install one?



alot, and yes, big labor to install and set up. Contract Brad Mayuer. He may be able to help with price and install labor.
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KenH
post Apr 30 2006, 03:28 PM
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$1000 - $1800 low end if you are lucky.

Tranny comes out, LSD is fitted to your Ring. Then the Pinon to Ring gear backlash has to be set & the Side Cover Pre-load has to be set. The backlash and pre-load require placing the proper shims behind the Diff Bearings. Unless you use a set of old bearings that have been opened up to just fit the shaft - the bearings have to be removed with a puller and pressed back on each time a shim is changed.

Ken
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Joe Bob
post Apr 30 2006, 03:40 PM
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last I checked...GPR had the Quaife for 1250. There's not much markup on them....Factory ones are a bit more.
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Aaron Cox
post Apr 30 2006, 03:41 PM
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QUOTE(KenH @ Apr 30 2006, 02:28 PM) *

$1000 - $1800 low end if you are lucky.

Tranny comes out, LSD is fitted to your Ring. Then the Pinon to Ring gear backlash has to be set & the Side Cover Pre-load has to be set. The backlash and pre-load require placing the proper shims behind the Diff Bearings. Unless you use a set of old bearings that have been opened up to just fit the shaft - the bearings have to be removed with a puller and pressed back on each time a shim is changed.

Ken


i think i called carquip and its about 500 bucks to set up the ring grar backlash and shimming of the diff....


so about 2 G installed...
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balljoint
post Apr 30 2006, 05:13 PM
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That price isn't too far off getting an LSD for a truck installed.
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Aaron Cox
post Apr 30 2006, 05:32 PM
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QUOTE(balljoint @ Apr 30 2006, 04:13 PM) *

That price isn't too far off getting an LSD for a truck installed.


but the actual diff for the porsche costs a ton mo money......
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KenH
post Apr 30 2006, 05:37 PM
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[/quote]

i think i called carquip and its about 500 bucks to set up the ring grar backlash and shimming of the diff....

[/quote]

Plus shipping the tranny (both ways) to CO.

Ken
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Aaron Cox
post Apr 30 2006, 05:42 PM
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[quote name='KenH' date='Apr 30 2006, 04:37 PM' post='671565']
[/quote]

i think i called carquip and its about 500 bucks to set up the ring grar backlash and shimming of the diff....

[/quote]

Plus shipping the tranny (both ways) to CO.

Ken
[/quote]
thats another 150......

ken - dodnt you get one installed recently?
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KenH
post Apr 30 2006, 06:04 PM
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Installed it myself.

Its not hard, just takes time.

Helps if you take the Jerry Woods transmission class. (he knows 101 tricks to make things simple)

If anybody is interested I would be glad to help.

Ken
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hmeeder
post Apr 30 2006, 06:53 PM
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Stock 901 LSDs are pricing at just under 5 Gs. (at least at Pelican and AA.)

Quaife are definitely the best price alternative and as I understand them, they do not have the added cost of worn disks to replace somewhere way down the road.
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Aaron Cox
post Apr 30 2006, 06:54 PM
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QUOTE(hmeeder @ Apr 30 2006, 05:53 PM) *

Stock 901 LSDs are pricing at just under 5 Gs. (at least at Pelican and AA.)

Quaife are definitely the best price alternative and as I understand them, they do not have the added cost of worn disks to replace somewhere way down the road.

i remeber paul guard has his own line of torsen style IIRC...

there are Guard, ZF's and Quaifes IIRC......
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rickyhgarcia
post Apr 30 2006, 06:57 PM
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I paid about $1400.00 plus shipping for a 40% Guard Transmission LSD. I bought it directly from Guard.
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KenH
post Apr 30 2006, 07:49 PM
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Remember you can convert a 915 Fine Spline LSD to the 901 Coarse Splines with some Guard Transmission parts. LSD carriers are all the same.

Ken
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Aaron Cox
post Apr 30 2006, 07:52 PM
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QUOTE(KenH @ Apr 30 2006, 06:49 PM) *

Remember you can convert a 915 Fine Spline LSD to the 901 Coarse Splines with some Guard Transmission parts. LSD carriers are all the same.

Ken


i searched for that article you wrote..... cant find it.

you need different bolts right?
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KenH
post Apr 30 2006, 07:56 PM
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Yes - buy them from your Porsche dealer.

Ken
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grantsfo
post Apr 30 2006, 08:24 PM
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So this sounds like a good project to include with close ratio transmission build at the end of this year. Appreciate the info.

This is the first 914 I have owned that has enough power to need an LSD. Very cool!
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nine14cats
post Apr 30 2006, 10:29 PM
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Hi Grant,

I've heard alot of folks who dual drive LSD's in AX and Track go for the 40% versus the 80%. That being said, I installed an 80% unit in my 901 for $1400 from Paul Guard. I had a shop do it. I can't remember the install price but I know I got a good deal. Since I was more track oriented, I decided on the 80%. But I didn't seem to have a problem with the push in the car from the LSD. I'd just tap the gas pedal!

Bill P.
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brant
post Apr 30 2006, 11:37 PM
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Definitely a thing to do while your inside the box for other reasons...
(or vica versa)

Interestingly...
I had a discussion with a quaife dealer last week.
He said EXACTLY the same thing that Paul Guard admitted to me.
For a 911 the zf style is recommended track and the Torque Bias for Autox...

Buttttt.....
both the dealer and Paul himself admitted that this isn't absolutely true for a mid engined car. The Torque biasing can out perform the clutch-pack on the TRACK in a 50/50 balanced mid-engined car.

so do your reasearch before you drop that cash next winter.
brant
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