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Quick question how hard is it to pull the main shaft and countershaft out of the trans to get to the input shaft bearing do you know?
 

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Discussion Starter #22
GSR vs. LS Synchro Comparison

We've all read/heard about the GSR's superior synchro's (and if you haven't, you have now). Since I have both transmissions apart I thought I'd share some of the internal differences between the transmissions. Lets start off with a general difference between cable and hydro transmissions.

The main difference between the old Cable transmissions and the newer Hydro transmissions is the shift forks. The hydro forks are welded and much stronger than the cable forks. The cable forks are 2 piece using a cast iron fork and a steel shaft. A roll pin holds the two sections together. The cable forks are also a bit heavier.

Hydro forks top, cable bottom:


Now on to the synchros.

The GSR transmission features oNE synchro that is different than the LS transmission. The 2nd gear synchro is built in a superior 2 piece design.

First the LS standard single cone synchro. You can see the cone is built into the gear and the synchro slows the gear when pressure is put on the brass synchro ring. The red friction area on the brass synchro ring slows the red synchro cone as the sleeve pushes on them while going into gear.




Now the GSR dual cone synchro. You can see the cone is a separate piece with a synchro both under and over it. The cone fits down into the 3 drilled holes effectively making the gear one piece when stacked. When moving into second gear, the synchro's sandwich the cone effectively doubling the braking surface applied to the cone. You can definitely "feel" the difference when you play with them outside the transmission. The GSR cone is superior not only for its larger braking area but also because of its easy to replace and rebuild nature. If only 3rd gear synchro's were built like this.

The blue area contacts the inner wall of the cone while the red area contacts the outer, just like the LS.


If you guys know of any other differences between the transmissions other than the bearings and gearsets (duh) then please post. I'd love to post up pictures showing any differences I may have missed.

Hope this helps people understand some of the differences that make the GSR/ITR transmissions superior to the LS.
 

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When you're done you're coming over to put this in my car right?
 

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question about the s2k master cylinder ( probably was answered but it might not have been cleared to me) why this mc and now the integra mc?
 

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well thanks for being the first to do this. i'll be watching and learning from you because i also need to replace my clutch master cylinder and this s2k might be a good oem performance upgrade. i'll probably buy the braided clutch line as well that way i won't have to reflare and be afraid of messing it up.
 

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Wow! great thread and way to keep up on the pictures. I also have my type r trans apart right now and am swapping a 5th gear. I had to pay that 150 you were talking about to replace the synchro sleeve set because I had a bad 5th gear grind. I didnt know that you could just drop the countershaft on a block of wood to get the gears off so I just dropped it off at AAMCO transmissions this morning to have the 5th pulled off and the new one pressed on.

Good luck on the rest of your rebuild and keep us updated!

Mike
 

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you should adapt the radiator lines for a built in oil cooler! i would but mine probally realy dirty cause ive had them open since i swapped the gsr motor in
 

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MeltMan on Aug/07/07 said:
Opening and Diagnosing the Transmission:

To begin, I first drained the transmission outside and proceeded to carry the transmission to my spare room. A comfortable work environment is a MUST: (no I'm not married)
So I'm not the only one who at times has more car parts/tools in the house than I'd care to admit. With your set up, some beer, coffee, and computer for posting to TI, there really isn't any need for crap like a television.

Nice write up and please post as many pics as possible.
 

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Looking good Casey. I want to have a look at those carbon lined synchros before you slap it back together.

Needs more LSD.

 
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macura2001
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