[FAQ] How to: Identifying B series transmissions.
05-03-2004, 06:06 PM
#26
Honda-Tech Member
Join Date: Feb 2001
Location: Mountain View
Posts: 3,775
Likes: 0
Received 0 Likes
on
0 Posts
Re: How to: Identifying B series transmissions. (JV)
ive got another tranny in my garage which im gonna crack open and count some teeth. supposedly its an S1 LSD. ill have gear ratios up tonight
05-03-2004, 06:46 PM
#27
Honda-Tech Member
iTrader: (2)
Join Date: Apr 2004
Location: MI, USA
Posts: 69
Likes: 0
Received 0 Likes
on
0 Posts
Re: How to: Identifying B series transmissions. (Downey)
You don't have to open up the case to figure out gear ratios. Just count the number of turns of the transmission input shaft to one turn of the output (where the axles fit in).
There are 26 splines in the transmission shaft (24 on the pre 1992 small spline transmissions). Put marks at two points on the splines and one reference point on the case (I used white paint and a fine paint brush). Then put a line on the output running from the case to the shaft. This will allow you to know when the output shaft has turned exact one time. Shift the transmission into a gear, turn the input shaft by hand, and count the number of turns it takes to move the output shaft exactly one turn. You can get 1/26 of a revolution accuracy by counting the number of splines the input shaft has moved in addition to the full revolutions.
Now it just takes a little math. The total revs are equal to the gear ratio times the axle ratio. For example, 1st gear in a GSR tranny would be 3.23 1st gear x 4.40 final drive, or 14.212 to 1. 0.212 times 26 equals about 5.5. Thus, with this transmission, you should get 14 revolutions plus 5 1/2 splines for one revolution of the output shaft in first gear.
Do this for each gear. You should be able to figure out what your individual gears and final drive is by comparing to charts for each transmission.
I know this works for a transmission with LSD, as I just did it. However, there might be a problem on non-LSD transmissions, if the transmission output revolutions are not the same on both sides. Has someone tried this on a non-LSD transmission?
There are 26 splines in the transmission shaft (24 on the pre 1992 small spline transmissions). Put marks at two points on the splines and one reference point on the case (I used white paint and a fine paint brush). Then put a line on the output running from the case to the shaft. This will allow you to know when the output shaft has turned exact one time. Shift the transmission into a gear, turn the input shaft by hand, and count the number of turns it takes to move the output shaft exactly one turn. You can get 1/26 of a revolution accuracy by counting the number of splines the input shaft has moved in addition to the full revolutions.
Now it just takes a little math. The total revs are equal to the gear ratio times the axle ratio. For example, 1st gear in a GSR tranny would be 3.23 1st gear x 4.40 final drive, or 14.212 to 1. 0.212 times 26 equals about 5.5. Thus, with this transmission, you should get 14 revolutions plus 5 1/2 splines for one revolution of the output shaft in first gear.
Do this for each gear. You should be able to figure out what your individual gears and final drive is by comparing to charts for each transmission.
I know this works for a transmission with LSD, as I just did it. However, there might be a problem on non-LSD transmissions, if the transmission output revolutions are not the same on both sides. Has someone tried this on a non-LSD transmission?
05-03-2004, 07:22 PM
#28
Join Date: Jun 2003
Location: dtown, tx, n/a
Posts: 764
Likes: 0
Received 0 Likes
on
0 Posts
Re: (nevin)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nevin »</TD></TR><TR><TD CLASS="quote">any info on the usdm LS cable trannys? They are A1 I belive.</TD></TR></TABLE>
05-25-2004, 06:58 PM
#30
Join Date: May 2003
Location: Atlanta, GA, U.S.A.
Posts: 107
Likes: 0
Received 0 Likes
on
0 Posts
Re: How to: Identifying B series transmissions. (JV)
Awww, shiot, look at that tranny. Wonderful build. Makes me sad i got a D-series tranny. This S40 on my d16y7 is total crap, damn 2nd gear synchro grinds like a ****. Nice write up, good to know that info, my friend is doin a tranny swap on his 'tegra.
07-18-2005, 08:56 PM
#33
Join Date: Jan 2004
Location: sinking spring, pa, united states
Posts: 52
Likes: 0
Received 0 Likes
on
0 Posts
Re: How to: Identifying B series transmissions. (boredracer408)
They forgot my trans.
94-95 Del Sol SiR II Y2.
only made 2 years. i would know i have it.
94-95 Del Sol SiR II Y2.
only made 2 years. i would know i have it.
08-08-2005, 01:33 PM
#35
Member
Join Date: Jul 2003
Location: Blame Miko. Athens Greece
Posts: 7,316
Likes: 0
Received 0 Likes
on
0 Posts
Re: (B18C5-EH2)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18C5-EH2 »</TD></TR><TR><TD CLASS="quote">Tech in a tech forum?
Weird...</TD></TR></TABLE>
I think I just might add this in my sig...
Weird...</TD></TR></TABLE>
I think I just might add this in my sig...
Thread
Thread Starter
Forum
Replies
Last Post
bseries, calculate, cams, chart, gear, honda, identifyng, identyfing, ratio, ratios, series, teeth, tranny, transmission, transmissions
