Swap chronicles: Transmission, gear swap, LSD, clutch and flywheel

[Flip-Eye]

Any Updates?

Seriously considering doing this swap if I can source a H23 trans for a decent price.

[Tishock]

The m2s4 h23 transmission is fine and has been performing well since early this year. But I haven't driven it since my amputation. A few friends that have driven it, like the car even more since the upgrade. The m2y4 h22 is just a giant paper weight.

What kind of update are looking for?

[Straight Success]

Thanks for the update.

[NTYPE]

I've just done a similar swap. My transmission is M2V5 from Australian DM Prelude VTI-R (H22A)
All our preludes come with 4.026 Final drive so I Swapped it out with a 4.266 FD from USDM M2F4 prelude - Straight swap.

I then Swapped out the 5th gear with a USDM F22 Prelude M2L5. The M2L5 (0.710) countershaft 5th gear was about 3mm too big so brought it along with the original M2V5 5th gear to a machinist to have it machined to match the original.
As for the Oil notches I added these with an angle grinder and filed the sharp edges, I doubt there will be any balancing issues.
I did take dimension measurements of the gears for reference but will have to look for the scrap of paper where I wrote it. Will update this post if I find it.

Anyway it's all back together now and turns + goes through the gears smoothly by hand. Will be installing into my F22A6 CB7 in the coming weeks, I'll let you know how it goes.

[Tishock]

I did take dimension measurements of the gears for reference but will have to look for the scrap of paper where I wrote it. Will update this post if I find it.

Please. More data is always welcomed.

[Tishock]

Thanks to NTYPE we have a little more data to add to this thread.

Here are the measurements for reference: (I've gone by the format shown in your swap chronicles thread) Some are missing like the diameters but the most important ones are there and the rest can be calculated.

M2V5 AUDM 5th Gen Prelude 5th gear 0.870

Mainshaft 31 Tooth
1st Measurement: 16mm
2nd: 31mm
6th: 0mm
8th: 31mm

Countershaft 27 Tooth
1st: 16mm
2nd: 18.5mm
6th: 16.5mm
8th: 18mm

M2L5 USDM 4th Gen Prelude BA8 5th gear 0.705

Mainshaft 34 Tooth
1st Measurement: 16mm
2nd: 31mm
6th: 0mm
8th: 31mm

Countershaft 24 Tooth
1st: 16mm
2nd: 23mm
6th: 19mm
8th: 20.5mm

[Bense]

Work in Progress.

Honda-Tech.com
[...]
http://honda-tech.com/showthread.php?t=1694413

Came here to post a URL to this familiar thread regarding a .685 gear swap but I now realize you already saw it.