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Out with the 2.5, in with the 5.7.
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joecitizennn  



Joined: 12 Sep 2005
Posts: 2096
Location: no mans land

PostPosted: Mon Dec 02, 2013 10:33 am    Post subject: Reply with quote

The synchronizer hub assembly was the tightest fit I encountered.



_________________
87 924s
88 924SE gone
447 hp cgt clone
87 924S gone
84 944 sold
83 944 sold
89 turbo S LSD, ABS etc
86 951 white rocket
85 944 sport everything.
84 944 sold.
87 944 sold
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joecitizennn  



Joined: 12 Sep 2005
Posts: 2096
Location: no mans land

PostPosted: Mon Dec 02, 2013 10:58 am    Post subject: Reply with quote

This the culprit that made third gear grind.

_________________
87 924s
88 924SE gone
447 hp cgt clone
87 924S gone
84 944 sold
83 944 sold
89 turbo S LSD, ABS etc
86 951 white rocket
85 944 sport everything.
84 944 sold.
87 944 sold


Last edited by joecitizennn on Mon Dec 02, 2013 11:04 am; edited 1 time in total
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joecitizennn  



Joined: 12 Sep 2005
Posts: 2096
Location: no mans land

PostPosted: Mon Dec 02, 2013 11:02 am    Post subject: Reply with quote

This is the LSD unit. The torque on the clutch pack checked out well within specs so I am leaving it alone.



_________________
87 924s
88 924SE gone
447 hp cgt clone
87 924S gone
84 944 sold
83 944 sold
89 turbo S LSD, ABS etc
86 951 white rocket
85 944 sport everything.
84 944 sold.
87 944 sold
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joecitizennn  



Joined: 12 Sep 2005
Posts: 2096
Location: no mans land

PostPosted: Fri Dec 06, 2013 7:59 am    Post subject: Reply with quote


_________________
87 924s
88 924SE gone
447 hp cgt clone
87 924S gone
84 944 sold
83 944 sold
89 turbo S LSD, ABS etc
86 951 white rocket
85 944 sport everything.
84 944 sold.
87 944 sold
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edredas  



Joined: 09 Dec 2004
Posts: 855
Location: Charlotte, NC

PostPosted: Fri Dec 06, 2013 9:05 am    Post subject: Reply with quote


_________________
'86 944 -Garnet, Fully loaded, Koni suspension
'87 924S -Red, 300hp 951 swap
'87 924S -Red, New Project
'87 924S -White, Automatic
'88 924S -Red, Daily Driver, Bone stock
'93 Mx6 -White, Megan Racing suspension
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joecitizennn  



Joined: 12 Sep 2005
Posts: 2096
Location: no mans land

PostPosted: Sun Dec 08, 2013 5:13 pm    Post subject: Reply with quote

Pelican came through with flying colors.



Gear cluster assembled with new synchro ring.


_________________
87 924s
88 924SE gone
447 hp cgt clone
87 924S gone
84 944 sold
83 944 sold
89 turbo S LSD, ABS etc
86 951 white rocket
85 944 sport everything.
84 944 sold.
87 944 sold
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joecitizennn  



Joined: 12 Sep 2005
Posts: 2096
Location: no mans land

PostPosted: Sun Dec 08, 2013 6:05 pm    Post subject: Reply with quote

This is the tallest 5th gear-set that the 944 carried. This would give around 170 mph at the lt1s redline. Taller ratios exist in another car with a similar sourced gearbox but I don't recall the make. I know it was a diesel. maybe Audi.



Gearbox ready.


_________________
87 924s
88 924SE gone
447 hp cgt clone
87 924S gone
84 944 sold
83 944 sold
89 turbo S LSD, ABS etc
86 951 white rocket
85 944 sport everything.
84 944 sold.
87 944 sold
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joecitizennn  



Joined: 12 Sep 2005
Posts: 2096
Location: no mans land

PostPosted: Thu Dec 12, 2013 11:48 am    Post subject: Reply with quote

Despite some part compatibility issues I am still making progress. The synchro I got ended up not being correct because of lock issues, and the diff carrier bearing was the wrong side. However with some cross-referencing I came up with a Timkin equivalent from autozone which was true to spec even in the most important clearance of thrust. Since it was right on I kept the two .020" shims that sat behind the race.



The cone bearing sits so close to the face of the LSD unit, use of a puller is not really feasible. Luckily the engineers made punch access holes.



The RH diff carrier bearing was the only bearing in the whole transmission that showed signs of problems.



New bearing


_________________
87 924s
88 924SE gone
447 hp cgt clone
87 924S gone
84 944 sold
83 944 sold
89 turbo S LSD, ABS etc
86 951 white rocket
85 944 sport everything.
84 944 sold.
87 944 sold
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GeorgeV  



Joined: 14 Mar 2010
Posts: 302
Location: Brisbane, Australia

PostPosted: Thu Dec 12, 2013 11:30 pm    Post subject: Reply with quote

Keep it up, Joe. This is a great build thread!
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1981 932 with mods:
http://www.924board.org/viewtopic.php?t=37921
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joecitizennn  



Joined: 12 Sep 2005
Posts: 2096
Location: no mans land

PostPosted: Tue Dec 24, 2013 4:01 pm    Post subject: Reply with quote

I am still looking for the correct synchro for 3-4 since Laso had to go and change the original design but use the same part number. Now the transmission is sitting in parts-bags on the bench waiting and that drives me nuts. I have found sources outside of the US, but i am still holding out for something local. There is a place in NC called Cogs Cogs (anyone ever used them?) that specializes in porsche transmissions, but I have not had luck getting a salesman on the phone yet.
_________________
87 924s
88 924SE gone
447 hp cgt clone
87 924S gone
84 944 sold
83 944 sold
89 turbo S LSD, ABS etc
86 951 white rocket
85 944 sport everything.
84 944 sold.
87 944 sold
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leadfoot  



Joined: 11 Dec 2002
Posts: 2222
Location: gOLD cOAST Australia

PostPosted: Tue Dec 24, 2013 5:08 pm    Post subject: Reply with quote

I had initial success with these guys but last time i tried had the same dead end no response,
potentially 928gt if there is some crossover of parts or California motorsport
or contact albins directly
are you running twin turbos then??
Stu
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1981 ROW 924 Turbo -
carbon fiber GT mish mash
LS1 conversion in progress...
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v8carreragts  



Joined: 05 Sep 2003
Posts: 665
Location: Tucson, AZ

PostPosted: Sat Dec 28, 2013 1:30 pm    Post subject: Reply with quote

Try calling Roger at California Motorsports. He seems very knowledgeable on all Porsche transaxles. Maybe he has the correct parts.
_________________
84 944--924 Carrera GTS clone w/520HP Chevy 302 V8--RUNNING!
2015 AUDI Q7
2013 Dodge Charger R/T AWD HEMI
2013 Chevy Cruze
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v8carreragts  



Joined: 05 Sep 2003
Posts: 665
Location: Tucson, AZ

PostPosted: Sat Dec 28, 2013 1:31 pm    Post subject: Reply with quote

http://www.californiamotorsports.net/index.htm

Here's there site.
_________________
84 944--924 Carrera GTS clone w/520HP Chevy 302 V8--RUNNING!
2015 AUDI Q7
2013 Dodge Charger R/T AWD HEMI
2013 Chevy Cruze
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joecitizennn  



Joined: 12 Sep 2005
Posts: 2096
Location: no mans land

PostPosted: Wed Sep 28, 2016 11:46 am    Post subject: Reply with quote

For what its worth there is now a source for the correct synchros. Pelican has revised what they had available and they now carry the correct part. The part number is 016-311-295-M260. If you plan on replacing synchros in these transmissions be careful as not all of them will work.

this one didn't work.


this one did.




They both come up for the same application. Two years ago the good one wasn't available. At least I could not find it.

Details on why the Laso didnt work
http://www.924board.org/viewtopic.php?t=39327&highlight=
_________________
87 924s
88 924SE gone
447 hp cgt clone
87 924S gone
84 944 sold
83 944 sold
89 turbo S LSD, ABS etc
86 951 white rocket
85 944 sport everything.
84 944 sold.
87 944 sold


Last edited by joecitizennn on Sun Oct 09, 2016 2:44 pm; edited 1 time in total
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joecitizennn  



Joined: 12 Sep 2005
Posts: 2096
Location: no mans land

PostPosted: Sun Oct 09, 2016 2:48 pm    Post subject: Reply with quote

So after nearly a three year wait on parts, with my transmission in pieces in a box, i was able to remember how it went back together in about two afternoons. With new seals, bearings and synchros it did not disappoint, clicking through the gears quietly and easily. The LSD is a little quick to chatter turning corners so I will give it more additive. The taller top gear really fits the engine better.


Thank you Pelican!

My only other quest related to this transmission is the find the ultra tall Audi 5th gear that the 944 never had. Supposedly it is out there but I don't have any serious leads on finding one because I don't know where to look yet.
_________________
87 924s
88 924SE gone
447 hp cgt clone
87 924S gone
84 944 sold
83 944 sold
89 turbo S LSD, ABS etc
86 951 white rocket
85 944 sport everything.
84 944 sold.
87 944 sold
Back to top
View user's profile Send private message
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