Alright guys I've been searching for a while trying to find a solution for the weaknesses in H22 trannys. For what I know is pretty much the synchros. I'm already having problems with my tranny (the usual 5th gear grinds as well as having some problems shifting into 2nd). MY clutch went out so I went and bought a clutch and I was going to look into options on replacing my stock h22 tranny with something better such as a Euro-R or something like that.

Turns out money is an issue (i'm going to school) and the options such as the Euro-R tranny and such things are way too expensive either way....So I'm thinking of going a different route with this...(if my tranny doesn't go out before I can accomplish this goal)

I want to know from you guys actual Tech guys that been working with this trannys for a while all the weaknesses that you know for a fact about the tranny, and how you would improve them.

I've also heard of "Dog Boxes" and that could also be an option.

I'm currently going to auto-tech school and they have a custom fab class here, I have a couple of friends that are already in it so may be I could get into a project with them as well as other things to get this done.

So now I need some info and if you guys know of any other options please let me know.

 

Hey man click on this link and go to this forum and you can get some good parts for your tranny.....Making it alot stronger...

https://honda-tech.com/zerothread?id=1085206

 

Some GM Syncromesh will kill those 5th gear grinds.

 

I got that and I didn't really noticed the difference

 

The 5th gear grind comes from the 5th gear shift fork bending over time.

One thing that would really improve H-series transmissions would be stronger forks.

TRE, who do DSM transmissions make custom shift forks for those guys as they have similar problems. http://www.teamrip.com
I started discussing the situation with them, but got distracted with some other stuff and never followed through.
They would probably be one of the best bets.

 

I have been working on the Prelude trannys for some time now. I have found that during hard shifting, the synchros do not "brake" fast enough to slow the gear allowing the selector ring to engage. My opinion is that improper lubrication and the hard shifting accelerate wear. What fails is actually the selector ring before the syncho itself. A few solutions to this would start with fluids. IN MY OPINION, synthetic fluids are too slippery and the syncho "braking" takes longer. This causes the seletor ring to slam into the gear's engagement teeth. GM synchromesh (friction modified) works by adding "friction" so the synchro can slow the gear reducing impact between the teeth and selector ring. Honda fluids are great, but IMO not designed for the harsh driving we put the cars through. Another solution is to use Carbon coated synchros. Honda has them availible for most other trannys, but only availible 3,4,5 gears for the Prelude currently. This carbon coating is far superior to the brass braking surface that standard synchros have. The carbon also slows the gears faster promoting less wear.

5th gear grind isn't completely related to a beant fork. It is usually due to improper fluid levels in the tranny. The selectors are oriented on the top of the gearset and are last to have the fluid "splashed" on them. the selector ring spins on the fork and if it is not getting proper lubrication, metal to metal conditions occur. The fork will not bend, but it will wear out.