i have a 91 crx si with a dohc zc motor swap. i am using my 91 si tranny with 140,000 miles on it. i have to double clutch every time i go into 3rd or it will grind. it is also getting harder and harder to go into 1st. i would like to get a new tranny, but i have also heard of rebuilding. has anyone taken apart their tranny and replaced the syncros and gears? how hard is it?

 

Taking apart the tranny to rebuild is a real pain in the ***!
Just buy a used D15/D16 tranny and slap it on there.

D15B has an LSD

 

Since when does the d15 trans have an LSD?? I was under the assumption that the only L3 trans with an LSD was the ZC trans.

 

what exactly is LSD and how does it work. i am not talking about the drug LSD. you said that only the zc tranny came with it?

 

only the japanese D15B-VTEC had the LSD tranny. it was from 92-00 and the tranny was called the S20. its the best sohc tranny, has a 4.25 final drive, LSD, and real close 1-5 gearing. its hard to find though.

unless you get a hydro kit, you can't use this tranny in your EF.

i'd find a JDM ZC tranny (LSD perf.) and then install your Si tranny's final drive.

 

LSD = Limited Slip Differential.

it allows power to be applied to both wheels during acceleration or turning. its good to have because it alleviates allot of understear and helps your launch when drag racing. Most honda LSDs are clutch type and require rebuilding after a certain mileage.

 

It is cheaper and easier to just buy a new trany but if you rebuild it, you'll know its in perfect condition rather then maybe getting anouther junky one. Single cam tranys are hard to work on...even harder the the dual cams.