si tranny
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From: 361/512, Texas, US
si tranny
i know for sure its not an HF tranny. this pic was taken going 80mph at this RPM in 5th gear. can this be an si tranny?...and the motor is a d15b7. if im not mistaken i believe the tranny code is L3?
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From: 361/512, Texas, US
Re: (xx89civicracer89xx)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xx89civicracer89xx »</TD></TR><TR><TD CLASS="quote">u cant tell by the code of the tranny... they all say l3 i believe... i know my si one does and i have seen dx's with l3 tranny code but it was a dx tranny</TD></TR></TABLE>
oh ok, but from what the others are telling me it is an SI tranny right?
oh ok, but from what the others are telling me it is an SI tranny right?
Re: (Mr_Si-R)
I know the HF have a stamp near the axel seal like A#### and the Si has the L3 (I think) but the DX could be the same. Some other people said the EX transmission have the B#### stamp but I think that's only for the hydro transmission.
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From: travis afb/sacramento, california, usa
Re: (UltimX)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by UltimX »</TD></TR><TR><TD CLASS="quote">3.5k @ 80 4 me according to the stamp on the tranny, the right one.
is it true that the 1-4 gears in the dx are the same as the si? and the 5th is the only difference?</TD></TR></TABLE>
not tru.. the gears are dif. the si's have a shorter gear pattern, hence in 5th the si is at about 4k(smaller gear) and the dx's are at about 3500
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mr_Si-R »</TD></TR><TR><TD CLASS="quote">
oh ok, but from what the others are telling me it is an SI tranny right?</TD></TR></TABLE>
yes it is safe to say ur tranny is a SI from wat all this info is sayin
is it true that the 1-4 gears in the dx are the same as the si? and the 5th is the only difference?</TD></TR></TABLE>
not tru.. the gears are dif. the si's have a shorter gear pattern, hence in 5th the si is at about 4k(smaller gear) and the dx's are at about 3500
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mr_Si-R »</TD></TR><TR><TD CLASS="quote">
oh ok, but from what the others are telling me it is an SI tranny right?</TD></TR></TABLE>
yes it is safe to say ur tranny is a SI from wat all this info is sayin
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From: Silicon Valley, CA, US
Re: (UltimX)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by UltimX »</TD></TR><TR><TD CLASS="quote">is it true that the 1-4 gears in the dx are the same as the si? and the 5th is the only difference?</TD></TR></TABLE>
No, it is not true.
In the DX, all five gears are the same as in the Si. The "final drive" is different. That is the ring and pinion, where the transmission "meets" the differential. This "final drive" acts as a multipler to all of the gears in the transmission. The DX and Si have different "final drives", or different multiplers for the whole transmission.
The overall effect is as if the DX had five gears that are all taller than the Si gears by a fixed ratio (e.g., 1.25 times as tall as the Si ones), but you can swap gears between the DX and Si and each will keep its respective gearing! You can get a similar effect if you put really tall tires on the car.
The HF has taller gears, and a taller ring and pinion! That's how it gets those mighty long legs--if only it could really stretch them...
--DD
No, it is not true.
In the DX, all five gears are the same as in the Si. The "final drive" is different. That is the ring and pinion, where the transmission "meets" the differential. This "final drive" acts as a multipler to all of the gears in the transmission. The DX and Si have different "final drives", or different multiplers for the whole transmission.
The overall effect is as if the DX had five gears that are all taller than the Si gears by a fixed ratio (e.g., 1.25 times as tall as the Si ones), but you can swap gears between the DX and Si and each will keep its respective gearing! You can get a similar effect if you put really tall tires on the car.
The HF has taller gears, and a taller ring and pinion! That's how it gets those mighty long legs--if only it could really stretch them...
--DD
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From: I am Tyson
Re: (Dave_Darling)
in other words, "final drive" does NOT mean "5th gear".
the final drives are different. 1-5 gears are the same between Si and DX.
honestly tho, both RPM's and MPH could be so off, its hard to tell by comparing RPM/MPH.
the final drives are different. 1-5 gears are the same between Si and DX.
honestly tho, both RPM's and MPH could be so off, its hard to tell by comparing RPM/MPH.
Re: (Dave_Darling)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dave_Darling »</TD></TR><TR><TD CLASS="quote">
No, it is not true.
In the DX, all five gears are the same as in the Si. The "final drive" is different. That is the ring and pinion, where the transmission "meets" the differential. This "final drive" acts as a multipler to all of the gears in the transmission. The DX and Si have different "final drives", or different multiplers for the whole transmission.
The overall effect is as if the DX had five gears that are all taller than the Si gears by a fixed ratio (e.g., 1.25 times as tall as the Si ones), but you can swap gears between the DX and Si and each will keep its respective gearing! You can get a similar effect if you put really tall tires on the car.
The HF has taller gears, and a taller ring and pinion! That's how it gets those mighty long legs--if only it could really stretch them...
--DD</TD></TR></TABLE>
ahhh thank you! you said you can "swap gears" does this mean the final drive aswell? I might just pick up the final drive from a junkyard then haha.
No, it is not true.
In the DX, all five gears are the same as in the Si. The "final drive" is different. That is the ring and pinion, where the transmission "meets" the differential. This "final drive" acts as a multipler to all of the gears in the transmission. The DX and Si have different "final drives", or different multiplers for the whole transmission.
The overall effect is as if the DX had five gears that are all taller than the Si gears by a fixed ratio (e.g., 1.25 times as tall as the Si ones), but you can swap gears between the DX and Si and each will keep its respective gearing! You can get a similar effect if you put really tall tires on the car.
The HF has taller gears, and a taller ring and pinion! That's how it gets those mighty long legs--if only it could really stretch them...
--DD</TD></TR></TABLE>
ahhh thank you! you said you can "swap gears" does this mean the final drive aswell? I might just pick up the final drive from a junkyard then haha.
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From: everyone has their price, NJ, USA
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From: Silicon Valley, CA, US
Re: (UltimX)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by UltimX »</TD></TR><TR><TD CLASS="quote">ahhh thank you! you said you can "swap gears" does this mean the final drive aswell? I might just pick up the final drive from a junkyard then haha.</TD></TR></TABLE>
I don't know about the R&P. But hey, at that point you're swapping everything--might as well use the other transmission case...
I know that in some cars the R&P are carefully matched to the transmission case by using parts with different tolerance groups and so on; in those cars you cannot swap the R&P into a different case without doing serious amounts of measuring and shimming and so on. I don't know if our cars fall into that general group or not.
--DD
I don't know about the R&P. But hey, at that point you're swapping everything--might as well use the other transmission case...
I know that in some cars the R&P are carefully matched to the transmission case by using parts with different tolerance groups and so on; in those cars you cannot swap the R&P into a different case without doing serious amounts of measuring and shimming and so on. I don't know if our cars fall into that general group or not.
--DD
Re: (Dave_Darling)
Si= 1000, 3000, 9000
mine said 3000 on the casing.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dave_Darling »</TD></TR><TR><TD CLASS="quote">My Si transmission gives me about 500 RPM for every 10 MPH in 5th gear. Looks like you have the same gearing as I do.
--DD</TD></TR></TABLE>
since u said this, my car goes from
3.5 = 80mph
4k = 85mph
Are you talking about the "ring gear" on the dif which is what the "ring and pinion" you are talking about?
DD or anyone else, do you have a helm manual and can tell me which number it is on the illustrated index? or is it on the diff?
Modified by UltimX at 10:47 PM 7/18/2006
mine said 3000 on the casing.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dave_Darling »</TD></TR><TR><TD CLASS="quote">My Si transmission gives me about 500 RPM for every 10 MPH in 5th gear. Looks like you have the same gearing as I do.
--DD</TD></TR></TABLE>
since u said this, my car goes from
3.5 = 80mph
4k = 85mph
Are you talking about the "ring gear" on the dif which is what the "ring and pinion" you are talking about?
DD or anyone else, do you have a helm manual and can tell me which number it is on the illustrated index? or is it on the diff?
Modified by UltimX at 10:47 PM 7/18/2006
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From: Silicon Valley, CA, US
Re: (UltimX)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by UltimX »</TD></TR><TR><TD CLASS="quote">
Are you talking about the "ring gear" on the dif which is what the "ring and pinion" you are talking about? </TD></TR></TABLE>
When I say "ring and pinion" or "R&P", I am talking about the ring gear on the outside of the differential, and the pinion gear on the end of the countershaft that spins the differential.
--DD
Are you talking about the "ring gear" on the dif which is what the "ring and pinion" you are talking about? </TD></TR></TABLE>
When I say "ring and pinion" or "R&P", I am talking about the ring gear on the outside of the differential, and the pinion gear on the end of the countershaft that spins the differential.
--DD
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Re: si tranny (Mr_Si-R)
bump 
i wanna start this thread up again with a new question.
what is a good repeacement tranny for the d15b7, or any d series? something that has similar gearing as the old si trannys. and also, ive heard the you can replace the 5th gear from an HF tranny and put it into the SI tranny so you can get a lower RMP at a higher speed. can anyone confirm this?
i wanna start this thread up again with a new question.what is a good repeacement tranny for the d15b7, or any d series? something that has similar gearing as the old si trannys. and also, ive heard the you can replace the 5th gear from an HF tranny and put it into the SI tranny so you can get a lower RMP at a higher speed. can anyone confirm this?
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Re: (Tyson)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tyson »</TD></TR><TR><TD CLASS="quote">i hate ppl who bump.
makes me not even want to bother to answer, even when i know the answer.</TD></TR></TABLE>
do it!
makes me not even want to bother to answer, even when i know the answer.</TD></TR></TABLE>
do it!
