Basically it goes like this:

I currently have an 88 CRX Si Transmission and a CenterForce Clutch. My 3rd gear and sincro are gone.

Now, im not really sure how many different transmissions there are for the crx but, for some reason i seem to remember the 88's having less splines on the shaft that goes through the clutch disk. I have another transmission from a CRX that has too many splines for my clutch disk to slide on. Also, someone said that some of the transmissions have a different number of splines on the input for the CV joint. Last but not least the Flywheel sizes.

Theres too much crap to be worried about here. I need a new trannie, but I want to keep my existing clutch. i love the way it hooks. Its about a year old and I have adapted to it. Finding an 88 si transmission is a pain. The other transmission that I have is freshly rebuilt so, im wondering what I should do. Coudnt he componets be swapped out from my 89=91 tranie to my 88?

Maybe someone here could make a contribution

 

Well, the cost of buying a new tranny to fit that clutch/motor will be much higher than just buying the center disc to fit your extra tranny.

1st option - Call up centerforce, and order a new center disc. The pressure plate should be the same for both trannies.

2nd option - Your other choice is to search for a replacement tranny identical to the one that's blown.

3rd option - pull the tranny, tear it down, and throw some performance synchros in there. While you're at it, hell... add an LSD if you like. In the end you'll have a really strong tranny, it'll bolt right up to your existing clutch and axles, and you won't have to worry about the tranny being the weak link anymore.

 

Here is some info to help you out. The 88 tranny is the only one to use the 21 spline input shaft. The 89-91 use the 20 spline input shaft. The difference on the axles is related to the HF/STD axles which uses a 23 spline inner joint rather than the 26 spline inner joint of the DX, Si, EX, etc.

Now as far as your clutch goes your options are some what limited. As you know you can't use your current clutch setup with any 89+ tranny. In fact to switch to an 89+ you will have to get a new clutch, pressure plate and flywheel.

Here are the different clutch sizes:

88 = 190mm
89 = 200mm
90-91 = 212mm

In my humble opinion your best bet is to rebuild what you have. Finding an 88 might be a little tough. Even if you can find it there is no guarantee that it will be in better shape than what you have. If you go with the 89+ you will have to replace all the other components and again you will have no guarantee that the tranny is better than what you already have. If you go with the rebuild it may cost a little more on the front end, but you will know exactly what you have.

 

great. Thanks alot for the answers and responces. The only disadvantage to rebuilding is cost and the ammount of time required to pull, rebuild, and install everything. I think im going to post a WTB ad in the classifieds and see what I come up with. I guess its worth a try. Thanks again! I always wondered what the differences were. Cool. - good nfo!

 

synchros =$20 shipped for SOHC's

 

I got an 88 si trans sitting around.

 

i tried once to get SI axles on my STD... found out that the INNER joints where it goes into the tranny its the same as in the STD.... now the outer joint its bigger on the Si than on the STD.... the tranny side spindle its the same in all models, the outer one its the one that changes, bc o f the bigger hub....

 

I have a tranny from a 90 dx
let me know if you're interested

 

@civicwagonman

You have an 88 Si transmission? Not dx/ex/hf/std/89/90/91 But 88 SI? Any problems at all? Grinds/tuff shifts/worn sincros?

maybe we can work something out?

 

Absolutely correct. I should have said outer joint. I think my brain may have been frozen.

 

Im assuming for stock synchros, nothing less nothing more, is this correct?

 

If you need a CRX SI trans this guy has one. flexmyREX is the user name


this is what is in his sig,
"FS: crx si tranny-$150"

sounds like a good deal.

 

probably not an 88 SI transmission. i will ask though. ThX

 

they are replcements from a major tranny parts supplier. What I use in my trannys when replacement in needed. They don't have the missing 6 teeth like stock synchros.

 

i think the way to go would be useing the 89-90-91 tranny that you have get a 92+
civic si, civic ex, or delsol si flywheel it has the 20 spline input shaft. this flywheel is the same overall size as the a6 on your crx it is alot bigger then the 89 ( same clutch size as the 88 except the splines (21)). this new flywheel is the same as the crx tranny's cept the 88which i wouldnt even bother with. Than sell your centerforce clutch buy one for the the flywheel you got slap the tranny you already have on it and you have a new clutch and the best setup for an a6 tranny.

goodluck