3 Tranny Questions
Thread Starter
Joined: Aug 2002
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From: Comerio, PR, USA
3 Tranny Questions
1) I have a Y1 cable trans with a 4.2 final which is not good for all motor. What can I do to improve it short of replacement?
2) I have two YS1 440 cable trannys. How can I tell if they are a USDM 90-93 Integra or from a 92-93 GSR?
3) On the YS1 trannys, which is better for acceleration (with the FD staying the same), lower or higher numbered gear ratios?
Thanks!
2) I have two YS1 440 cable trannys. How can I tell if they are a USDM 90-93 Integra or from a 92-93 GSR?
3) On the YS1 trannys, which is better for acceleration (with the FD staying the same), lower or higher numbered gear ratios?
Thanks!
Honda-Tech Member
Joined: Nov 2001
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From: medium pimpin
Re: 3 Tranny Questions (7rrivera7)
1) swap for a 4.4 fd- trans swap is easier, though.
2) open the case (it's not that hard) and count the teeth on the gears. the first gear ratio of the 92-3 ys1 trans from the b17 gsr is 3.307; the 90-93 ls trans has a 3.230 first gear ratio.
3) gears with closer numerical ratios are generally (for us) better for acceleration.
Thread Starter
Joined: Aug 2002
Posts: 2,028
Likes: 11
From: Comerio, PR, USA
Re: 3 Tranny Questions (slofu)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by slofu »</TD></TR><TR><TD CLASS="quote">
2) open the case (it's not that hard) and count the teeth on the gears. the first gear ratio of the 92-3 ys1 trans from the b17 gsr is 3.307; the 90-93 ls trans has a 3.230 first gear ratio.
3) gears with closer numerical ratios are generally (for us) better for acceleration.</TD></TR></TABLE>
2) count the teeth and tehn what - divide by the # of teeth on the FD or divide the FD by the number of teeth on the gear?
3) Ok but if the number is higher is the tranny quicker or the opposite?
2) open the case (it's not that hard) and count the teeth on the gears. the first gear ratio of the 92-3 ys1 trans from the b17 gsr is 3.307; the 90-93 ls trans has a 3.230 first gear ratio.
3) gears with closer numerical ratios are generally (for us) better for acceleration.</TD></TR></TABLE>
2) count the teeth and tehn what - divide by the # of teeth on the FD or divide the FD by the number of teeth on the gear?
3) Ok but if the number is higher is the tranny quicker or the opposite?
Honda-Tech Member
Joined: Nov 2001
Posts: 1,827
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From: medium pimpin
Re: 3 Tranny Questions (boots)
divide the # teeth on output/counter shaft by # on input shaft, e.g. 42/13=3.230 for 1st gear.
short answer: use the b17a gsr ys1 trans if you have it.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boots »</TD></TR><TR><TD CLASS="quote">the more teeth, the faster the acceleration</TD></TR></TABLE>
not necessarily so. each ratio depends on the # teeth on 2 gears. both the 4.78 and 4.4 fd have 81 teeth total (main+counter), but for any given gear with the same ratio (between 2 trannies), the trans with 4.78:1 fd will yield greater tq by multiplication. you want the right amount. for most NA B series engines 4.78 FD > 4.4, and for most all of our practical purposes closer gearing > longer.
short answer: use the b17a gsr ys1 trans if you have it.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boots »</TD></TR><TR><TD CLASS="quote">the more teeth, the faster the acceleration</TD></TR></TABLE>
not necessarily so. each ratio depends on the # teeth on 2 gears. both the 4.78 and 4.4 fd have 81 teeth total (main+counter), but for any given gear with the same ratio (between 2 trannies), the trans with 4.78:1 fd will yield greater tq by multiplication. you want the right amount. for most NA B series engines 4.78 FD > 4.4, and for most all of our practical purposes closer gearing > longer.
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