NirVTEC

Can't you just use the EuroR? T2W4? Same stuff.....
There are some Euro guys on the board, you may want to see if they can help.

vinuneuro

These guys should be able to get it for you. Pirate ordered trans parts from them with good results.

http://www.autodynamics-honda.com/hotrax.html

Why are you looking for the mainshaft though? I'm pretty sure all 5gen mainshafts are the same. At least usdm Base and SH have the same p/n.

117

I'm thinking the M2R4 or M2P4 would be cheaper since they don't use LSDs. I'd really like to just order the parts instead of an entire trans. I'd think the ATTS M2R4 would be even less desireable, so maybe even cheaper! Doubtful, though.

117

USDM base and SH yes, but look at the EDMs. They're different, and you have to change the mainshaft to change 1st and 2nd gears.

I probably won't do it if it's terribly expensive. I never use 1st or 2nd at the track anyway!

vinuneuro

Do you have EDM part numbers to suggest that they use a different mainshaft? I can't imagine why that'd have to be changed for a ratio change.

NirVTEC

Look at it this way, you'll have a nice short-gear to get the car on the trailer!

117

It's actually a tad longer than USDM.

However, if I go with a 5.15 FD like I'm thinking for my spare trans, 1st gear is pretty useless anyway! It would be great if there was a trans with like a 2.5:1 first gear. :p

Vig pointed out that the synchro set for 1-2 is different. Not sure it would be worth the work. If I were to munch a synchro set, and I had no way to get a replacement from overseas, I could be up a creek!

117

Vig, you're my friend and all, but you really should look at stuff before you say things like this. Almost all Honda manual transmissions (at least of this vintage) have 1st and 2nd gear *machined* into the mainshaft. To alter those ratios, you have to change the mainshaft and the corresponding countershaft gears.

vinuneuro

I've never torn down a trans. And I asked, didn't say it as a matter of fact..

My M2U4 has been sitting in the garage waiting for me to open it and look at the diff for over a year now..and now the cold weather is back zapping my motivation.

117

Excuses, excuses. I've heard (and used!) them all. Why do you think my track car is so far from being "finished"?

NirVTEC

Damn, I tried to make a funny and failed.
*Bangs head* LONGER 1st and SHORTER 2nd.

117

No, I think you're right Clint, it's a shorter 2nd, and the 1st is the same... I was the one being an idiot.

NirVTEC

1st gear is a minute difference ~1%
2nd is considerably shorter.....

For me, my trans choice was based on 3rd gear. I went with the M2Y4 for THAT reason. On my home track[Gingerman] a longer 3rd gear saves me from 2-3 shifts 2-3 d/shifts per lap.
With my powerband I can walk 3rd gear out to over 100mph now. Previously being stuck in the mid 90s with the M2F4.

Kronn 98SH

1994 Accord Coupe (CD7)
1994-1995 Accord Coupe (CD9, EuDM)
1994-1996 Accord Sedan (CD5)

Although the serial number suggests it's the 4th year of production, which would indicate it's from 1997. But in 1997, that trans wasn't used in USDM, CDM, or EuDM Accords. It's possibly from a JDM Accord from 1997.

kandyflippa247

thank you Kronn, with that being said i got this engine/trans as a complete setup... when it was shipped to the garage it came on pallet with the engine and trans seperated!!! and NO HARNESS, we do have the ecu...if its even the right one.... but back to my O.P. we put them together and their clearly not from the same car, this was supposed to be an OBD1 swap, would the tranny matter if its from an OBD2a car? Oh and do you know how to know/check if its the right ecu for the motor/ trans???

thanks, again

xero_xero

is the ATTS engine bolt pattern different? i have heard and ONLY heard that they are.

xero_xero

3 things, (1)thanks for feeding one of the forum monkeys. (2)why do you dislike hondata? (3)whats so hybrid about your k24 making some killer power?

Kronn 98SH

Yes, thank you for not clogging up my thread.

88rexA6

in light of gear-swapping, the last time i had [what i believed to be] an m2f4 open, i attempted to swap in a new 3/4 sleeve set from honda (ordered for a 93 prelude vtec), and the shift fork groove in the sleeve was considerably larger than the one being replaced (i didn't measure it). anyone have any information on the differences in this groove and shift fork thickness difference?

serjey15

Hey man I got a question. Does anyone know the rpm a h22a1 prelude with stock tranny should have when going 70mph?

My car is stock with everything, codes match.
But when Im going 70mph I am just barely over 4000rpm.
And my 3rd gear maxes out at like 83-84mph.
Could someone have changed the main syncro or something?
Cuz all the gears are shorter.
Thanks

minilogoguy18

^You mean the final drive, possible but no way to tell unless you open it up. Remember though, tire/wheel size has influence on this too, with my stock T2W4 which has the same final and 5th as all others with a 225/45R16 tire I'm at 4k while going 80mph.

serjey15

well how much do the wheeld affect? i have 16" with 45 tires. they look a little small

Mfoehrkolb

Know anything about p2t4 trans?

Mfoehrkolb

Just picked up a p2t4 trans today for a good price, it isn't on the "master list".

slammedbbs

higher the gear number iam guessing longer the gear? example 3.307 vs. 3.284 is the 3.307 a longer gear?