Paul H22

The transmission blew up as explained in this thread.

And now it's back!

So this makes transmission configuration #3.

#1 was the M2Y4 5th gen tranny with stock open differential.

#2 was the M2F4 4th gen tranny with Quaife LSD and 4.85 final drive. That's the one that blew up. Final drive broke, fragged the counershaft, locked the transmission, etc.

#3, the new setup, is a mix of the gearset and stock 4.266 final drive from the first tranny with the Quaife LSD and good snychros from the 2nd transmission.

So it's a M2Y4 5th gen tranny with Quaife LSD, all in a 4th gen M2F4 case basically.

The car feels a bit tammer now and slower revving but that's okay. Still feels quick. That 4.85 FD was a bit too high strung. The gas milage will be much better now too. Next time I would go with a 4.74 FD from a better company. One with stronger teeth..

Now I can go 145+ instead of 130 and no more 4850rpm going 80mph in 5th.

My new years resolution is to not blow up this transmission again.

Cliffnotes: Tranny blew up and was rebuilt.

cdika17

congrats

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Chase
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Paul H22

Thanks. Preciate it.

LudemanDan

What kind of gear ratio combination do you have, exactly? I'm thinking of building a frankentranny next summer for my Si.

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"The only thing that needs adjusting is the nut behind the wheel."

Paul H22

Right now I just have the regular 5th gen gearset with the stock final drive. It just happens to be a in 4th gen case.

5th Gen M2Y4:
1 - 3.285
2 - 1.956
3 - 1.344
4 - 1.034
5 - 0.812
FD - 4.266

LudemanDan

Ah. I was thinking of throwing longer 4th and 5th gears from an S into mine for the freeway mileage; but now that I've driven on the track, I don't know if I want 3rd and 4th to be farther apart, or even 4th and 5th for that matter.

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"The only thing that needs adjusting is the nut behind the wheel."

Paul H22

^^ You'll be fine as long as you get a final drive with strong gears.

mtbprelude

And then that will throw you into DP for Solo2 too. Ask Paul about DP....

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2007 FP... 6fth; 2008: just tryin not to be DFL

Paul H22

Yeah, down here DP is a class composed of a the champion racecar miata driver Steve "Hacksaw" Hudson and myself.

For some reason I keep losing to him. Hmm.

alvanderp

Actually SM allows gearing changes, and swaps from a Prelude on the same line in SP would be legal under Update/Backdate so he could actually run DSP.

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vwong

Was the 4.85 final drive a custom made one? What about the 4.74 one that you're thinking about getting? Who is a better company? Houseman?

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2009 BMW 335i Coupe, Alpine White/Black Dakota, 6MT
2010 Audi S4, Ibis White/Magma Red, 6MT

Paul H22

4.85 was made by Houseman. They arn't bad products, although I am lead to believe the teeth configuration isn't quite as strong.

The 4.74 I'm thinking of is Prodrive.

71dsp

It's a 4.714. Not a big difference, but at least get the ratio right.

vwong

I don't see this on Prodrive's website. Is it something they custom build too?

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2009 BMW 335i Coupe, Alpine White/Black Dakota, 6MT
2010 Audi S4, Ibis White/Magma Red, 6MT

Paul H22

^^ I don't think it's custom. Where did you get yours, Billy?

71dsp

I got it through a group buy. It is a 4.714 FD, not 4.74.

Honda318dx

you know what would be cheaper then a FD, just get a M2F4 3-5th gears... I think I have some laying around..

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Corey Jacobs
1993 Prelude VTEC
Honda-Challenge H1

ExodusFX

4.7143 Haha, just messing with ya Billy.

Prodrive is now Circuit Worx

http://www.circuitworx.com/products.html

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vwong

What are the ratios of those gears?

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2009 BMW 335i Coupe, Alpine White/Black Dakota, 6MT
2010 Audi S4, Ibis White/Magma Red, 6MT

Paul H22

Slightly shorter 1st, 3rd, 4th, and 5th. Lower top speed.

4th Gen M2F4:
1 - 3.307
2 - 1.950
3 - 1.360
4 - 1.071
5 - 0.870
FD - 4.266

5th Gen M2Y4:
1 - 3.285
2 - 1.956
3 - 1.344
4 - 1.034
5 - 0.812
FD - 4.266