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  #931  
Old September 13th 2011, 14:08
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Wally Wally is offline
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Quote:
Originally Posted by Sandeep View Post
I hear ya.

While that diff is out, do you happen to have the part # handy for the 100mm output flange ? I'm at odds with the local Porsche dealer and don't want to order something I cannot return.

Thanks

Sandeep
Maybe even better, I think I still have an extra set I once bought for the 412 which I was thinking of converting to G50. Bought a complete G64 front diff for it
Also looked at the subs, but they are a casting without any numbers on them.. At www.mittelmotor.de you can however chase down most all numbers for original porsche parts in their catalog and order them at the same time if you feel like it ;-)

Rich: not sure what there is to rebuild as only the original brass disks can and do wear, even if they seem original thickness. Learnt this from Paul.
See pics on former pages, its quite simple once you see the inside.
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Last edited by Wally; September 13th 2011 at 15:29.
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  #932  
Old September 13th 2011, 15:34
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Just removed the ring gear and bearings so both could be compared in detail.
All the important measurements that would impact ring-gear distance are extremely close (beyond my accuracy anyways), for all practicle purposes I would say they are the same. Lets hope I am correct...

The only thing I really need, is a set of new ring-gear bolts ($$ no doubt) as the flange of the LSD is 2mm thicker (to the direction that doesn't impact ring gear distance of course ).

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  #933  
Old September 13th 2011, 16:27
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Quote:
Originally Posted by Wally View Post
Maybe even better, I think I still have an extra set I once bought for the 412 which I was thinking of converting to G50. Bought a complete G64 front diff for it
Also looked at the subs, but they are a casting without any numbers on them.. At www.mittelmotor.de you can however chase down most all numbers for original porsche parts in their catalog and order them at the same time if you feel like it ;-)
Thanks for that. I used the www.autoatlanta.com website to confirm the part #, but the local dealer believes the swap will not work.

No issues though ... used G64 front diffs are going for ~$200 on EBay, going to try another local source first.

Good luck with the swap !

Sandeep
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  #934  
Old September 14th 2011, 02:38
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Quote:
Originally Posted by Sandeep View Post
No issues though ... used G64 front diffs are going for ~$200 on EBay, going to try another local source first.

Sandeep
Exactly! Shipping it overseas would not be cost effective for such a part.

I am still looking for the correct new (longer) bolts I need for the swap over of the ring gear. Its a M12 x1.25 bolt in 12.9 grade, but would be nice to have the part number. Mittelmotor don't list inner diff parts. I'll look at auto-atlanta in return
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  #935  
Old September 14th 2011, 05:14
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If I'm looking for Porsche part numbers I just go to the Porsche online PET rather than via a 3rd party.

http://www.porsche.com/uk/accessorie...artscatalogue/

I had an issue accessing the 996GT3 catalogue but the 996 catalogue list two possible options for the ring gear bolts (with LSD).

999 217 152 01 or 996 332 276 00 depending on which diff (can't quite read the full number in your photos).

The GT2 catalogue lists the 999 217 152 01 bolt for use with the 996 332 083 9B (40/65% GKN) diff. The bolts are M12 x 1.5 x 22,5

Hope that helps.

Last edited by Bruce.; September 14th 2011 at 06:01. Reason: Edit part number as per Wally below.
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  #936  
Old September 14th 2011, 05:22
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oh..... and the front diff axle flanges from a 964 C4 are "964 332 209 01", if you need that number.

Interestingly, the gears inside that front diff (which I guess the subs splines attach to) have a 950 part number and are straight from a G50 box (plus 928 & 968)

Last edited by Bruce.; September 14th 2011 at 05:34.
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  #937  
Old September 14th 2011, 05:41
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Quote:
Originally Posted by Bruce. View Post
If I'm looking for Porsche part numbers I just go to the Porsche online PET rather than via a 3rd party.

http://www.porsche.com/uk/accessorie...artscatalogue/

I had an issue accessing the 996GT3 catalogue but the 996 catalogue list two possible options for the ring gear bolts (with LSD).

999 217 152 01 or 999 332 276 00 depending on which diff (can't quite read the full number in your photos).

The GT2 catalogue lists the 999 217 152 01 bolt for use with the 996 332 083 9B (40/65% GKN) diff. The bolts are M12 x 1.5 x 22,5

Hope that helps.
Thanks Bruce, that helps surely, but I looked into the catalogue also and the 999 217 152 number seems to be the partnumber of the regular open diff (although a pic of a lsd was used, the general title of that section is 'Differential') as opposed to the 'Limited Slip Differential' section, where the 996 332 276 00 number seems to come from...
You wrote 999 332 276 00 but I am sure you meant 996 as first 3 digits for this one.

I could open de 996GT3 as well as the 996GT2 and both list the same pic and part numbers for that 9B diff..

I do indeed have that GKN diff however, so I am a little confused now which one I need... Could you check if your assesment is still correct, pls?
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Last edited by Wally; September 14th 2011 at 06:02.
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  #938  
Old September 14th 2011, 05:56
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The 996GT3 catalogue is perhaps clearer (i got it to open at last).

http://www.porsche.com/all/media/pdf...T3_KATALOG.pdf

Like the GT2, it lists the LSD (the only diff) as part number 996-332-083-9B. It is hard to read from your photo the last two digits but could this be your diff (or does it end "00" or "01").

The GT3 & GT2 use the 999-217-152-01 bolts (only option listed).

(also corrected the part number above for the other bolts, as you mentioned)

Last edited by Bruce.; September 14th 2011 at 06:02.
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  #939  
Old September 14th 2011, 08:42
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Thanks Bruce, the diff number ends with 9B, so its spot on.
I'll order the 999.217.152 bolts then

It will be fun to later couple a 1200 T1 engine to a 996GT2 equipped diff with a Gears Transmission friction plates upgrade
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  #940  
Old September 14th 2011, 09:12
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Bruce,
By any chance, do you also know the correct torque setting for these bolts? I did came across it once, but didn't save the info then...:-(
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  #941  
Old September 14th 2011, 09:38
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Hi

Does this help?

Steve
Attached Images
File Type: jpg 996 diff.jpg (80.4 KB, 25 views)
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  #942  
Old September 14th 2011, 10:52
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Steve:
From what I can gather, that is the "street" LSD.
Wally's LSDiff is the motorsport version which is tighter than an inappropriate simile.


Wally:
For the torque settings, I think the safest plan would be to send another email to Guard. I'm sure he will spare 2 mins for a customer. Internet chatter suggests 50ftlbs+90degrees with locktite for a standard diff but I wouldn't trust that spec without confirmation from a reliable source such as Guard.

Last edited by Bruce.; September 14th 2011 at 11:14.
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  #943  
Old September 14th 2011, 12:38
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Quote:
Originally Posted by Bruce. View Post
which is tighter than an inappropriate simile.

Quote:
Wally:
For the torque settings, I think the safest plan would be to send another email to Guard. I'm sure he will spare 2 mins for a customer. Internet chatter suggests 50ftlbs+90degrees with locktite for a standard diff but I wouldn't trust that spec without confirmation from a reliable source such as Guard.
Well, I am no customer really. Paul send me a few old used disks from his own old stock as a favour to try out in my bug. He has sold most of the company a few years ago, but carries still his name. I did already send Paul a message of course from my new email adress. Hope he receives it as he probably knows this value by heart. So cool he wants to help a bugger out!
Hope to be able to pick up the bolts tomorrow afternoon as they were in stock at the central porsche dealership over here.
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  #944  
Old September 14th 2011, 15:00
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Wally, sorry for changing the topic, but could you detail the modification you did to the oil filter pressure relief ball/spring setup? I was surfing the keversite.nl forums with google translate, but it's not that good :P
Thanks!
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  #945  
Old September 14th 2011, 15:26
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Easy: drill 5.0mm hole in top above ball-spring, tap with M6 tap and install M6 bolt with lock nut. Install with loctite

These are/were the original bolts: 22.0 mm shank length. I need 2mm more (i.e. 24.0-24.5mm).


I do hope the ordered bolts are the correct length, but how could they not be?
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