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ALIKA T3
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Joined: July 30, 2009
Posts: 7196
Location: Honolulu,Hawaii and France
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ALIKA T3
Samba Member
Joined: July 30, 2009
Posts: 7196
Location: Honolulu,Hawaii and France
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 Posted: Sun Oct 23, 2022 11:32 am Post subject: Re: Porsche 930 CV conversion axle length? |
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More info as I recently used the GoWesty 930 stub axles on an 87 Doka 2WD. (091/1 transmission here but same as 094 2WD transmission location)
The stub axles are about 8.5 mm longer.
Basically 10mm minus the little lip which is about 1.5 to 2mm.
The ride height is at 20.25", 514mm, same as my Syncro.
I chose 20.5" axles, which fit perfectly the Syncro, but prove to be a hair too short for the 2WD as the transmission sits higher up in the chassis.
I haven't measured the flange to flange on the 2WD. Ideally a longer axle would be better. 21-3/8" is the next available size, and could be chopped down to the perfect length, not yet determined.
For now I'll add CV spacers and longer screws to see how it goes, but that will increase CV angle which I'm not a fan of...
_________________
Silicone Steering Boots and 930 Cv boots for sale in the classifieds.
Syncro transmission upgrade parts in the Classifieds.
Subaru EJ22+UN1 5 speed transmission
http://www.thesamba.com/vw/forum/viewtopic.php?t=416343
Syncro http://www.thesamba.com/vw/forum/viewtopic.php?t=4...num+gadget |
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ALIKA T3
Samba Member
Joined: July 30, 2009
Posts: 7196
Location: Honolulu,Hawaii and France
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| Posted: Wed May 01, 2024 4:04 pm Post subject: Re: Porsche 930 CV conversion axle length? |
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Aloha all!
Since this is a discussion about CV joints and 28 splines stuff for front and rear, I thought it would be relevant to share my findings about 16" w/locker front outer CV joints, 98mm diameter, 28 splines.
There's been 3 or 4 generations of this CV joint by VW/Löbro GKN, part number 251498099C
Here are screenshots of my Instagram stories @alikamotorsports.
I actually broke a CV cage and was hoping to steal one from an Audi CV joint.
Turns out only the first generation 16" CV's are compatible as far as cage swap, or you have to swap the cage+star into the CV joint.
In my case I had the unpleasant surprise to find out the Audi CV joint had been re-grounded, so the balls were too big to reuse the parts unless I get the 16" grounded as well.
The Audi CV joints are extremely confusing and almost no clear reliable info is out there.
I also learnt during my search that there is a stamped part number on the CV itself that is almost never used by VW or parts sellers online bc they use the part number of the boot+CV joint kit.
What I was looking for is any 98mm Audi CV joint with 28 splines I could buy NOS to steal the cage+ star for repairing my 16" newer CV joint.
One serious craftsman could build a Syncro 16" CV joint with an Audi joint welded onto a 14" CV stub ...
Also it turns out, often the suffix in the part number is for the model with the ABS ring.
Once you understand that, it's easy.
Lemme reveal these findings for you:
The CV joint I had on hand was 447407305B, which didn't turn much online.
The magic trick is to substitute it for 447498099B , boot+CV kit, to obtain search results. I found out that 98mm 28 splines CV joints always have XXX498099 as a part number, but not all are 98mm OD 28 splines.
Again the suffix is for the ABS ring, I think 
This listing on eBay confirmed my logic findings. The box has a different part number than the CV joint.
This one is 443498099B for the kit, 443407305B just for the CV joint.
It ressembles a lot the 447407305B CV joint I have but with 90mm OD and 25 splines, just like the regular Syncro 14" ( or 16" Syncro no front locker)
Another good pick is 443498099 (A for the ABS ring of that same model, B is the short version with ABS ring, I'm not sure there's a short version without ABS ring) One can guess the CV joint only part number might be 443407305
Now onto the work on my 16" CV joint. I'm waiting on the NOS CV joint to fix it still but I had spares 16" CV's for now to get back on the road.
Ok, now it's all uploaded ( flying to SyncroFest 2024 now, the plane has Starlink Internet, amazing!)
In real life the boot doesn't interfere with anything, I'm quite happy with it, I'm sure the fee times I'll be with a wheel in the air at full droop, the slow rotation should be ok to not rip the boot on anything, especially the 3 bolts for the radius rod.
I do have to do the job again though, gonna upgrade to the very expensive NEO HPCC #1 grease from T3TECHNIQUE.
Sh!t's expensive but with Swepco 164, somehow my CV cages front and rear were crying for murder last time I went serious off-roading, never had an issue in Central America. I did use my lockers a lot to pull a F-150 V6 truck out of the mud a few times. These things suck at off-road.
Alika
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Silicone Steering Boots and 930 Cv boots for sale in the classifieds.
Syncro transmission upgrade parts in the Classifieds.
Subaru EJ22+UN1 5 speed transmission
http://www.thesamba.com/vw/forum/viewtopic.php?t=416343
Syncro http://www.thesamba.com/vw/forum/viewtopic.php?t=4...num+gadget |
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dkoesyncro
Samba Member
Joined: December 10, 2006
Posts: 999
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| Posted: Thu May 02, 2024 6:18 am Post subject: Re: Porsche 930 CV conversion axle length? |
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Excellent write up! I was wondering about those boots, I see they offer some UTV boots in silicone but most are running the 934 CVs.
What does the future hold for the 16” outer CVs? Awhile back I was recovering from an injury and dived in to options. Looked at the Chevy 1500/suburban and a mid era IFS ford explorer/expediton and also a Mercedes G wagen came up having the same spline counts inner and outer but I couldn’t find an IFS G wagen. |
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ALIKA T3
Samba Member
Joined: July 30, 2009
Posts: 7196
Location: Honolulu,Hawaii and France
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| Posted: Thu May 02, 2024 7:28 am Post subject: Re: Porsche 930 CV conversion axle length? |
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Thank you!
There's no CV joint that will fit the Vanagon, there's always a sealing surface that doesn't match or a spline length issue. I looked for days obsessed with it.
They can be re-ground, but sourcing a new one from scratch is gonna become impossible.
They could be remade for cheap in India, but yuck the quality...
_________________
Silicone Steering Boots and 930 Cv boots for sale in the classifieds.
Syncro transmission upgrade parts in the Classifieds.
Subaru EJ22+UN1 5 speed transmission
http://www.thesamba.com/vw/forum/viewtopic.php?t=416343
Syncro http://www.thesamba.com/vw/forum/viewtopic.php?t=4...num+gadget |
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burleymotorsports
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Joined: July 17, 2005
Posts: 337
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