Tech - Type R Transmission Gearing, Shiftpoints, and Final Drive Discussion

[coolhandluke]

Let's start by highlighting OEM configurations. If you haven't already visited www.integratyper.org, check it out! Matt has already documented much of the DC2 and DC5 information, such as this Comparison sheet.

This thread will document transmission discussions across Type R models.


DC2

JDM 1995-1996
Transmission Code: S80 with 4jhd gearbox
1st: 3.230 (39 mph)
2nd: 2.105 (60 mph)
3rd: 1.458 (87 mph)
4th: 1.107 (115 mph)
5th: 0.848 (143 mph)
FD: 4.400 *Add 80mph cruising RPM
R: 3.000
LSD: Helical

***Add chart + shift RPMs

USDM & CDM 1997-2001
Transmission Code: S80
1st: 3.230 (39 mph)
2nd: 2.105 (60 mph)
3rd: 1.458 (87 mph)
4th: 1.107 (115 mph)
5th: 0.848 (143 mph)
FD: 4.400 *Add 80mph cruising RPM
R: 3.000
LSD: Helical

***Add chart + shift RPMs

JDM 1998-2000
Transmission Code: S80 with ne3 gearbox
1st: 3.230 (39 mph)
2nd: 2.105 (60 mph)
3rd: 1.458 (87 mph)
4th: 1.034 **Add max speed
5th: 0.787 **Add max speed
FD: 4.785 *Add 80mph cruising RPM
R: 3.000
LSD: Helical

***Add chart + shift RPMs

UKDM & EDM 1998-2000
Transmission Code: S80
1st: 3.230 (39 mph)
2nd: 2.105 (60 mph)
3rd: 1.458 (87 mph)
4th: 1.034 **Add max speed
5th: 0.787 **Add max speed
FD: 4.785 *Add 80mph cruising RPM
R: 3.000
LSD: Helical

***Add chart + shift RPMs

AUDM Oct 1999- Jul 2001
Transmission Code:
in-progress
1st:
2nd:
3rd:
4th:
5th:
FD:
R:
LSD:

***Add chart + shift RPMs


Aftermarket DC2 Final Drive
Option 1: 4.785
-

Option 2: 4.9
-

Aftermarket DC2 Gearing

MFactory Close Ratio Gearset Version A ****Add PN
in-progress
1st: 3.070
2nd: ***Confirm OEM ratio
3rd: 1.636
4th: 1.310
5th: 1.054
FD:

***Add chart + shift RPMs

MFactory Close Ratio Gearset Version B ****Add PN
in-progress
1st: 3.070
2nd: ***Confirm OEM ratio
3rd: 1.667
4th: 1.357
5th: 1.129
FD:

***Add chart + shift RPMs

MFactory Close Ratio Gearset Version C ****Add PN
in-progress
1st: 3.070
2nd: ***Confirm OEM ratio
3rd: 1.700
4th: 1.410
5th: 1.207
FD:

***Add chart + shift RPMs

DC5

JDM & AUDEM Jul 2001- Jul 2006
Transmission Code: Y2M3
1st: 3.266 (39.5 mph)
2nd: 2.130 (60.6 mph)
3rd: 1.517 (85 mph)
4th: 1.212 (106.4 mph)
5th: 0.972 (132.7 mph)
6th: 0.780 (157.5 mph @8,000 rpm)
FD: 4.764
R: 3.583
LSD: Torque response type Helical LSD


***Add chart + shift RPMs

AUDM Aug 2001- Sept 2004
Transmission Code:
in-progress
1st:
2nd:
3rd:
4th:
5th:
6th:
FD:
R:
LSD:


***Add chart + shift RPMs

EK9

JDM 1997-2000
Transmission Code:
in-progress
1st:
2nd:
3rd:
4th:
5th:
FD:
R:
LSD:


***Add chart + shift RPMs


CL7 Oct 2004-2008
in-progress
Transmission Code: RBC3 / ASP3*
1st: 3.266
2nd: 2.13
3rd: 1.517
4th: 1.147
5th: 0.921
6th: 0.738
FD: 4.764
R: 3.583
LSD: Helical

***Add chart + shift RPMs


FK8
Transmission Code:
in-progress
1st:
2nd:
3rd:
4th:
5th:
6th:
FD:
R:
LSD:

***Add chart + shift RPMs


Change log:
-v1.1.1: Updated wording
-v1.1: Added CL7 information
-v1: Initial Draft 8/1/19

[coolhandluke]

Historical piece: Honda Motorsports Europe transmission spec sheet built in conjunction with European Luigi Racing (ELR.)
Credit: Mike M. (RBoosted717), William de Braekeleer (Head of Honda Motor Europe), and Marc (ELR)




More References
- Motorsport.com - William de Braekeleer

[aw614]

There is also the zealautowerks transmission calculators which is a pretty good resource for mixing and matching gear ratios and getting estimates on highway RPMs, etc.
https://www.zealautowerks.com/transcalc.php

[citrus3000psi]

I will say the shortened gear set really brought my car to life. The best upgrade I ever did to car.

[coolhandluke]

I will say the shortened gear set really brought my car to life. The best upgrade I ever did to car.

I will work towards documenting the MFactory "Type B" and "Type C" gearsets for equal comparison.

[Dave7CDMTYPER]

I have the jdm 4.7 fd installed in my R. It makes the trans feel more like a "rally" operation, in terms of shifting more. It's a lot of fun. But it limits the driveability on the Hwy.

[RTW DC2R]

I have the jdm 4.7 fd installed in my R. It makes the trans feel more like a "rally" operation, in terms of shifting more. It's a lot of fun. But it limits the driveability on the Hwy.

Nah, 4.7 is easy on the highway, and just about perfect in all regards IMO.

Once you go 4.9 though, suddenly you are close to being in VTEC at highway speeds. Unless of course you swap out to a GSR 5th like I currently have. But that can make 4th/5th shifts a little strange (especially on track) but once you get used to it its no big deal. Rev the shit out of 4th and youll still be in VTEC when you hit 5th. Good times!

MFactory's gear calculator and charts are a good reference
http://www.teammfactory.com/calculator

[coolhandluke]

MFactory's gear calculator and charts are a good reference
http://www.teammfactory.com/calculator

FF-Squad and Zeal also offer calculators, but all seem to use outdated versions of Flash. Use at own risk. I'm considering an Excel approach and document the screen shots on our forums for the greater community. FF Squad's link also offers teeth counts and more details.

Transmission Project Update:
-USDM ITR 5th set arrived Saturday
-USDM ITR 4th main arrived last week
-OS Giken LSD arrives today

I just need to source a USDM 4th counter and I can schedule my build. I will document in my build thread.

[StorminMatt]

I have the jdm 4.7 fd installed in my R. It makes the trans feel more like a "rally" operation, in terms of shifting more. It's a lot of fun. But it limits the driveability on the Hwy.

Nah, 4.7 is easy on the highway, and just about perfect in all regards IMO.

Once you go 4.9 though, suddenly you are close to being in VTEC at highway speeds. Unless of course you swap out to a GSR 5th like I currently have. But that can make 4th/5th shifts a little strange (especially on track) but once you get used to it its no big deal. Rev the shit out of 4th and youll still be in VTEC when you hit 5th. Good times!

MFactory's gear calculator and charts are a good reference
http://www.teammfactory.com/calculator

The 1998-2001 JDM 4.785FD transmission actually already comes with fourth and fifth from a GSR. This makes fifth gear in the 1999-2001 the same overall as in a 1997-1998 with the 4.4FD. So freeway RPMs are the same between the two. However, using the GSR fourth and fifth gears narrows the gap between fourth and fifth at the expense of widening the gap between third and fourth.

[aw614]

At the two track events I've done at the FIRM in Florida, I found to not like that 3rd-4th drop on the JDM 4.785 trans for downshifting and in some sections the slight power drop off. Could be track dependent though and my inexperience