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Old 03-13-2003, 08:44 PM   #1
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Default Gear ratios:

I thought some of you would apreciate this. I have 2 more trannies to tear down and I will post up that info as well. M2L5 and I can't remember the other off of the top of my head...

4th Gen
F22:............ Si (H23a).......... VTEC (H22a)

1. 3.307.......... 1. 3.307.......... 1. 3.307
2. 1.810.......... 2. 1.857.......... 2. 1.950
3. 1.230.......... 3. 1.320.......... 3. 1.360
4 0.903........... 4. 1.034.......... 4. 1.071
5. 0.705.......... 5. 0.812.......... 5. 0.870
FD 4.062......... FD 4.266.......... FD 4.266
*Above info taken from USDM Helms manual.

M2B4 (JDM LSD). M2J5 (JDM). M2A4 (JDM)

1. 3.307.......... 1. 3.307.......... 1. 3.307
2. 1.950.......... 2. 1.810.......... 2. 1.950
3. 1.360.......... 3. 1.269.......... 3. 1.360
4. 1.034.......... 4. 0.966.......... 4. 1.034
5. 0.787.......... 5. 0.787.......... 5. 0.787
FD 4.266......... FD 4.062.......... FD 4.266
*Above info taken from teardown and tooth counts.

5Gen:.......... Euro R (T2W4)

1. 3.285..........1. 3.285
2. 1.956..........2. 2.090
3. 1.344..........3. 1.481
4. 1.034..........4. 1.071
5. 0.812..........5. 0.812
FD 4.266..........FD 4.266

Accord Type-R (U2Q7)
1st - 3.285
2nd - 2.090
3rd - 1.481
4th - 1.071
5th - 0.870
FD - 4.266

Accord SIR-T T2T4
1: 3.285
2: 1.956
3: 1.344
4: 1.034
5: 0.787
R: 3.000
FD: 4.266

**For some stupid reason the columns did not work out. sorry if this is hard to read.


Modified by 2point6 at 3:49 PM 7/29/2003


Modified by 2point6 at 3:50 PM 7/29/2003


Modified by 2point6 at 3:53 PM 7/29/2003


Modified by 2point6 at 8:12 AM 7/30/2003


Modified by 2point6 at 9:24 AM 9/15/2007
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Old 03-13-2003, 08:57 PM   #2
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Default Re: Gear ratios: (2point6)

whoa that M2A4 is BUNK! I've been quoting that as 4th gen ratios! whoops!
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Old 03-13-2003, 09:22 PM   #3
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Default Re: Gear ratios: (satan_srv)

thanx for the info 2.6...

[Modified by dsludefosho, 10:23 PM 3/13/2003]


[Modified by dsludefosho, 3:05 PM 3/14/2003]
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Old 03-14-2003, 05:27 AM   #4
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Default Re: Gear ratios: (2point6)

great thread, thanks. Click the image to open in full size.
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Old 03-14-2003, 12:21 PM   #5
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Default Re: Gear ratios: (-743-)

Acually the M2A4 has a really interesting 3rd gear. This may allow you to stay in the power band longer at the end of the track...


[Modified by 2point6, 12:23 PM 3/14/2003]
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Old 03-14-2003, 12:28 PM   #6
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Default Re: Gear ratios: (2point6)

Yea, the M2B4 1st 2nd 4th 5th with a M2A4 3rd gear might work out well for the track. How hard is it, or is it even possible, to just change one gear? Scott, I'll drive down to Tucson and give you a free shifter if you can do it for me Click the image to open in full size.
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Old 03-14-2003, 12:32 PM   #7
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Default Re: Gear ratios: (4bidden)

I can do it for you. The gears need to be changed in pairs, meaning the input shaft gear and the counter shaft gear. I have heard of people just changing one of the gears, the car will run, but the tranny will make noise.

Free shifter...Hell yeah! Just say when...
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Old 03-14-2003, 01:03 PM   #8
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Default Re: Gear ratios: (2point6)

Explain making noise....?
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Old 03-14-2003, 01:44 PM   #9
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Default Re: Gear ratios: (4bidden)

Like a whinning noise due to a mismatch with the angle (cut) of the gears.
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Old 03-14-2003, 03:04 PM   #10
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Default Re: Gear ratios: (2point6)

Ah, well crap. Thats no good. Maybe I should just drive it down to you in Tucson so you can help me figure out whats going on with it. Still have a horrible hesitation and it is killing my 1/4 times. All I can manage now is 14.5@94mph.
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Old 03-14-2003, 04:03 PM   #11
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Default Re: Gear ratios: (2point6)

hey my euro-r tranny makes a funny noise too, when i slow down it sounds like its whinding down. is that the same problem? or something else?


[Modified by F20bcivic, 12:04 AM 3/15/2003]
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Old 03-16-2003, 05:26 PM   #12
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Default Re: Gear ratios: (F20bcivic)

I believe the Euro R trannies have "straighter cut" gears. This can cause whining as well. This is most likely the case with deceleration. I would not see it as a problem. The whinning of improper gears is much different.
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Old 03-16-2003, 09:17 PM   #13
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Default Re: Gear ratios: (2point6)

damnit..i wanna know what gear ratios my tranny has...GRRR no one can find it..the Code is P2T4, ive even got pics of it cuz people think im reading it wrong??...but i still havent found it, maybe you can find it?..peace
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Old 03-16-2003, 09:39 PM   #14
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Default Re: Gear ratios: (PreludeRacer023)

Hey man.... I got that oil pan too.... J/K... I know that must suck in a way, but be god like in a way from your times with what you got on it... One day you will find out, one day...
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Old 03-17-2003, 07:11 AM   #15
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Default Re: Gear ratios: (JTCdudeman)

I have heard of another "p" series tranny was asked about before, and I believe it is from a "Hong Kong" Market car.


[Modified by 2point6, 7:11 AM 3/17/2003]
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Old 03-17-2003, 10:36 AM   #16
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Default Re: Gear ratios: (2point6)

id like to find out, when i got my motor, the timing cover had 4 diff languages on it, english, french, and 2 others...so i figured it was from a european car, the tranny was with it...thanks..peace
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Old 03-18-2003, 08:50 AM   #17
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Default Re: Gear ratios: (PreludeRacer023)

I made a mistake on the on the M2A4 tranny gear ratios... They are the same as the M2B4 lsd tranny.
Sorry for the inconvenience
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Old 03-18-2003, 09:25 AM   #18
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Default Re: Gear ratios: (2point6)

The JDM has a good 5th gear ratio of 0.787.. ideal for hwy driving.
I don't know what they were thinking with a 0.870 for the H22a (US/CAN).

Why would they do that??
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Old 03-19-2003, 02:43 PM   #19
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Default Re: Gear ratios: (MechEng)

not too hijack the thread...but. I found a useful tool to calculate your gear ratios. (if you change your FD, or any other gears, this will give you a good idea of what rpm you be @ at x speed etc.)

http://www.reverendsgarage.net/index...5d663e55f7bfe1
I found this tool in the s2k forum...all credit goes to Schatten Click the image to open in full size.

Here is what I came up w/for my 97 SH w/the prodrive FD (which is a ratio of 4.7143.)

Total gearing in first gear: 15.4864755
Maximum speed in first gear: 32.7 mph

Total gearing in second gear:9.2211708
Maximum speed in second gear: 54.9 mph

Total gearing in third gear: 6.3360192
Maximum speed in third gear: 79.8 mph

Total gearing in fourth gear:4.8745862
Maximum speed in fourth gear: 103.8 mph

Total gearing in fifth gear:3.8280116
Maximum speed in fifth gear:132.2 mph

it gives you a nifty graph too!
Click the image to open in full size.
looks very similar to 4th gen speeds, doesn't it?

here is the stock SH graph for comparison.
Click the image to open in full size.

Click the image to open in full size. D, who is not very happy about paying $1200 to accelerate like a 4th gen Click the image to open in full size.






[Modified by dsludefosho, 3:45 PM 3/19/2003]


[Modified by dsludefosho, 3:55 PM 3/19/2003]
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Old 03-19-2003, 03:00 PM   #20
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Default Re: Gear ratios: (dsludefosho)

Here is a lil comparison for you 4th gen owners (VTEC)

Here is the stock graph
Click the image to open in full size.

Here is the 4th gen w/the Prodrive FD.
Click the image to open in full size.
Holy acceleration Batman!! no topend though Click the image to open in full size.
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Old 03-20-2003, 06:59 AM   #21
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Default Re: Gear ratios: (dsludefosho)

That is some really cool info. Thanks! Click the image to open in full size. Click the image to open in full size.
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Old 03-21-2003, 07:53 AM   #22
 
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Default Re: Gear ratios: (2point6)

do yo know of any Auto tranny info?

All I know is my H23 Auto Tranny out of my 92 has FD of 4.43..... gear ratios?

And have you ever seen any info on the JDM H22 Auto Tranny's.... It's out of a 92 as well...
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Old 03-21-2003, 11:21 AM   #23
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Default Re: Gear ratios:

here is what i want to know... will my 4th gen be faster with a pro-drive 4.7 fd? with 22"slicks? 23? 23.5? id hate to waste well over 1200 dollars + labor on that gear and have no gains...
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Old 03-21-2003, 09:45 PM   #24
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Default Re: Gear ratios: (ALTERED4)

yes...it would be faster..

Is it worth $1200 Im not sure.. Go to the site I provided and it will produce a graph that will give you an idea of how much your acceleration will improve. (I can tell you your car will top out @ about 120)
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Old 03-24-2003, 08:05 AM   #25
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Default Re: Gear ratios: (dsludefosho)

Quicker... not faster.
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