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944 Transmission Walkthrough (image heavy)

 
Old 02-05-2013, 08:08 PM
  #46  
flipo
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in this write up there is a note on one of the pictures that one should make sure that the pin on the reverse gear selector rod is in the slot.

Does annyone have an idea on what kind of problems would occur if it is not?

I ask this because i'm trying to diagnose a gearbox problem

Any help would be appreciated
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Old 02-05-2013, 10:09 PM
  #47  
JET951
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Hi Flipo,
If the pin is not in its correct position then the gearbox will be stuck in reverse. If you were to try select another gear the gearbox will lock up.

What is the problem you are experiencing?

Regards
Sean
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Old 02-06-2013, 04:14 AM
  #48  
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Hey Sean ,thanks for the reply . the problem i experienced is the following:
in practice i shifted down to third gear but he jumped back out , i then adjusted
the schifter stick by moving it backwards slightly and after a test run the problem seemed to be fixed but 10min in the race on sunday i could only select second and fourth gear an later on only fouth gear non of the other gears could be selected .

I took the tranny appart but i can't find anything out of the ordinary ,there are no broken pieces .I just noticed that it was possibel to move the plate with the pin that is on the reverse selector rod over the plate with the slot that pivots on the bolt .I can only asume that this plate was posisioned to low so that the pin was able to jump out of the slot .but i do not know if this would explain the symptons described above???

I hope you understand any of this .

sorry for my poor English
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Old 02-06-2013, 05:17 PM
  #49  
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Hi Flipo,
The problem you describe almost sounds like its related to the actual shifter mechanism itself. You have probably already done it but double check the bushes on the shift linkage on the transmission. Also check to see if you have much freeplay at the gearstick.( on the 968 they run bushes in the gearstick that can wear out).

There could be 2 reasons the transmission jumped out of gear.
1. the gear was not selected properly, meaning that if there was a lot of slop in the linkage system somewhere it may feel like it has the correct amount of throw but it may not be enough to get the gear all the way. Causing the gear to just out.
2. one or more of the gearbox detents are stuck or hard to move when in place. ( these are the bullet looking pieces with springs behind them. to check their operation put them in their original positions and push them down with a screw driver or punch to make sure they do not bind.

the fact that it would not select any other gear then 4th tells me that the gearstick linkage seems not to be getting the correct amount of movement to reach 1/2 - 4/5.

BTW is it a 5 speed or 6 speed

Regards
Sean
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Old 02-06-2013, 05:51 PM
  #50  
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It's an AOR transmision, the weard thing is that the trans has been working properly for 12 to 15 races past season
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Old 02-06-2013, 06:03 PM
  #51  
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I will check everything you mentioned tomorow . Thanks for the help Sean !
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Old 02-07-2013, 05:57 PM
  #52  
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Name:  shifter.jpg
Views: 1400
Size:  24.0 KBProblem resolved , there was nothing wrong with the transmission ! It was the shift lever , I have the lindsey racing adjustable lever and both of the locking screws came out resulting the threaded ball to turn slowly turn upwards until it limited forward movement of the lever .
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Old 02-07-2013, 06:09 PM
  #53  
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Well diagnosed Sean!
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Old 02-07-2013, 06:59 PM
  #54  
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Thanks Patrick,
Glad you found the problem Flipo, even better it wont cost anything to fix.
Sean
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Old 02-07-2013, 07:58 PM
  #55  
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Thanks for the help Sean.
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Old 02-17-2013, 05:52 PM
  #56  
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Hi guys,

I'm going to rebuild my gearbox together with Flipo and placing my LSD in. I read that the standard LSD can be "upgraded" by torqueing down a bolt on the LSD a little more to get a 60% instead of 40%LSD. Does anyone have any info about this?

Thanks!
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Old 02-17-2013, 08:22 PM
  #57  
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Hi Dutch944,
its actually not true that you can upgrade the standard LSD by increasing the shim thickness inside the LSD unit. All you are manipulating is the initial locking of the unit. To change the % of a LSD unit the ramps inside the unit must be changed. As far as i am aware no one manufactures alternative ramps for the standard porsche LSD, On that note the Guard Transmission LSD come with 2 locking values (as the unit can be pulled apart and the ramps be turned to set a different %)
regards
Sean

Last edited by JET951; 02-18-2013 at 05:01 PM.
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Old 02-18-2013, 04:26 PM
  #58  
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Hi Sean,

Thanks for the info. I'll just be putting the LSD in and refurbish the gearbox. Apart from a view bearings Flipo has almost all the parts we need so i'll be doing it in a view weeks. Is there anything you want me to take pictures of for the start post?

Thanks! Bas
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Old 02-23-2013, 03:04 PM
  #59  
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funny i just called 944online to ask some questions and then found this. Asked him if he could put some parts together and send 'em my way. He then said that I would f*** myself and then have a box of parts he wants him to put together. I liked his honesty from his experience. I have never done this transmission, but i'm not afraid to get my hands dirty in this one. Where did you get those special tools from? Like that spline holder.
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Old 10-03-2013, 03:31 PM
  #60  
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Sean: Do you have a walkthrough of only LSD install? :-)

Just bought an S2 box and hope it has the LSD but otherwise I might take the LSD from my turbo box and swap it in the S2.

Is this a direct swap and how hard is it to do this?

I've read that Audi V8 diff from late eighties fits in the 016 box if you just mill down one axle 5mm. This is a torsen diff but available cheap.

Any other things to do while doing this mod?

Thanks
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