B-Series | Gear Ratios
Tranny Code
S80
Y21/S21/S4C
Y21/Y80/S80/S4C

S80/Y80

S80

YS1

Y1

S1/J1
S1/YS1
Chassis Grade
JDM 98-01 ITR
US 92-01
Delsol (B16A)
99+ Si coupe
US 97-01 ITR
JDM 95-97 ITR
JDM 92-00 SiR/CTR
US 94-01 GS-R
JDM 93.5-01 SiR/SiG
US 94+ LS/GS/
Spec.Ed.
JDM 92-93
Integra RSi/XSi
US 92-93 GSR
JDM 89-91
civic/crx SiR
JDM 90-91
Integra RSi/XSi
US 90-93
Integra RS/LS/GS
Spec.Ed.
Tranny Type
Hydro
Hydro
Hydro
Hydro
Hydro
Cable
Cable
Cable
Cable
1st
3.230
3.230
3.230
3.230
3.230
3.307
3.166
3.230
3.230
2nd
2.105
2.105
2.105

1.900

1.900

2.105
2.052
2.105
1.900
3rd
1.458
1.458
1.458
1.360
1.269
1.459
1.416
1.458
1.269
4th
1.034
1.107
1.107
1.034
0.966
1.107
1.103
1.107
0.966
5th
0.787
0.848/0.875-99+Si only
0.848
0.787
0.714
0.875
0.870
0.848
0.742
Reverse
3.000
3.000
3.000
3.000
3.000
3.000
3.000
3.000
3.000
Final Drive
4.785
4.400/ *4.266-99+Si only
4.400
4.400
4.266
4.400
4.266
4.400
4.266
Comments
Only tranny that has a 4.785 final drive.Nice n' tiiite!
non LSD
FYI...
99+ Si coupe and 94+ LS share the same final drive - wacky!
All 'R' trans are LSD equipped. SiR models have optional LSD.
US GSR are non-LSD.
JDM SiR/SiG has optional LSD.
non LSD. Excellent gas mileage though!
Same gearing as 92-01 hydro SiR/ITR/CTR but in cable form. Optional LSD.
Y1's have optional LSD.
non LSD
non LSD

*debatable disclaimers
 • There is noteable bickering on the net about the S1/J1/Y1 B16 transmission gearing. It mainly revolves around the 5th gear. I find it a waste of time to whine over the 5th gear being too tight or too long of gear. Big deal - it's only 5th gear! My tranny specs were gathered from the Revspeed civic/integra bible(s).

The 4.266 final drive is a debatable spec. If you look in a Helms manual for the 99+ Si Coupe, you will see that 4.266 is the final drive spec. Eddy Lin has found that to be false - he physically took a 99+ Si tranny apart and counted the final drive teeth which calculated to a 4.40 final drive ratio. So, yeah..it's debatable, but I believe it to be a 4.40, even though the Helms manual could be (and probably is) wrong.

• According to my resources, the Y1 + YS1 cable tranny's, are the only two that came with optional LSD's in Japan.

• There's a debate over the 5th gear ratio, in the J1 transmission. Whether or not it's a shorter or longer ratio gear. I personally don't care, but what I have up on here is what I believe it is, and what I've learned from my sources..
Not that it's a big deal or anything....

• US market did not receive any LSD equipped cable tranny's.

• ANY B-series tranny (cable & hydro) will mate up to ANY B-series engine block:  B16A/B17A/B18C1+5/B18A+B/B20.
  Just make sure that you use the correct clutch, flywheel, & intermediate shaft when mating the trans.

• Lastly, a lot of people think that you can tell a tranny's gear ratio by the tranny code, which is false!.

• The tranny code ONLY tells you what chassis the tranny orginally came from - not what gears are inside of it.
  Click here for steps on how to check a tranny for LSD.
 



B-Series | Teeth Count
Thanks to Eddy Lin's expertise, this list was compiled...
Sorry, only B-series hydro tranny specs are listed.
Refer to list above for ratios.
Tranny Type
98-01 JDM ITR
95.5-98 JDM ITR
98+ CTR
97-01 US ITR
94-01 US GSR
93.5-01 JDM SiR-G

93-97 (US) Delsol DOHC VTEC

(US) 99+ Si Coupe

(US) 94-01 LS

1st
main: 13
counter: 42
main: 13
counter: 42
main: 13
counter: 42
main: 13
counter: 42
main: 13
counter: 42
main: 13
counter: 42
2nd
main: 19
counter: 40
main: 19
counter: 40
main: 20
counter: 38
main: 19
counter: 40
main: 19
counter: 40
main: 20
counter: 38
3rd
main: 24
counter: 35
main: 24
counter: 35
main: 25
counter: 34
main: 24
counter: 35
main: 24
counter: 35
main: 26
counter: 33
4th
main: 29
counter: 30
main: 28
counter: 31
main: 29
counter: 30
main: 28
counter: 31
main: 28
counter: 31
main: 29
counter: 30
5th
main: 33
counter: 26
main: 33
counter: 28
main: 33
counter: 26
main: 33
counter: 28
main: 32
counter: 28
main: 35
counter: 25
Final Drive
4.785
main: 14
counter: 67
4.400
main: 15
counter: 66
4.400
main: 15
counter: 66
4.400
main: 15
counter: 66
4.266
(according to Honda!)
main: 15
counter: 64
4.266
main: 15
counter: 64




B-Series | Gear Ratios - RPM to MPH/KM Ratio Tests
I had the chance to perform gear ratio testing on some of the B-series transmissions listed below.
Around 4000rpm is where I took note of the RPM's vs. MPH to determine where the ratio's differ between eachother.
Sorry about some of the speeds being KM's. Some of our cars have a Japanese gauge cluster.
You can convert KM-MPH down below at your convenience or conduct your own on-road tests..
Some of you may experience different results in your own on-road tests and that is because of differnt variables.
These variable may include: wheel & tire size, and gauge cluster calibration (honda speedometers are known to be off about +/- 5mph).
The 'BS (Blacksheep) Ratio' was my previous gearing/speed ratios, until my car got stolen!
Tranny Type
Y1 w/LSD
S1
J1

BS Ratio*

 

 

1st @ 4000 RPM
38 km
30 km
30 km
18-19 mph
2nd @ 4000 RPM
48 km
48 km
50 km
28-29 mph
3rd @ 4000 RPM
68 km
68 km
73-74 km
40 mph
4th @ 4000 RPM
88 km
90 km
92-93 km

53-54 mph

more on the way...

5th @ 4000RPM
108-110 km
110 km
111-112 km
72-73 mph
(80mph @ 4400/4500 rpm)
Final Drive Equipped
4.266
4.400
4.400
4.785
Rim+Tire Size Tested On
195/15/50
195/14/60
195/15/50
195/15/50
MPH-KM/H & KM/H-MPH Converter
Enter a number in either text field, then click outside the text field to get a result.
MPH: = KM/H:
Also, check out additional conversions HERE

*BS gear ratio's consist of Hydro B16 1-4th gears, GSR 5th, and the 4.785 final drive.
My usual freeway speeds maintained -- 4500rpms @ 80mph.