Gear Ratios Options

[BonzaiCelica]

I was wondering what the purpose of the final drive gear ratio?

also what is this? http://auctions.nengun.com/item/k113042803

[BonzaiCelica]

someone help me put this to rest... so does the c series transmission final drive transfer over to our s54 transmission. According to these calculations they do :



following videos for proof :





also just the origin of me discussing this topic : http://www.6gc.net/forums/index.php?showto...78064&st=80

This is quoted by a 6gc member via email :

Very interesting I have learned something new about the ring and pinion compatability between the S and C series transmission. However dont get so cocky yet lol... read on and you'll see that there is nothing in that thread which shows why that trans seems to be geared lower/shorter then a stock 6th gen GT. If anything it would be geared longer... which is what u where saying right?

If not then then yes it is possible ur car is geared higher/longer then a stock gt but i doubt its that of the custom work and probably because that trans is NOT an S54 but an S51... if it is an S54 then its the 71/18 = 3.94444 version. But this would lead to better performance since it would take advantage of your higher redline as well as the increase in power and torque. It might also lead to better fuel economy.

"The 4.176 S54 has 17 teeth on the output shaft driven gear and 71 teeth on the ring gear."
These are the s54's that are in the gt 6th gens.

"The Corolla's C59 uses a 67 tooth ring gear with a 17 tooth drive gear for 3.941. This is the perfect match for the S54's 17 tooth drive gear."

"So this gives the S54 with 17 teeth these possible differential gear ratios: 3.941, 4.058, and 4.176"

smaller the number the higher the gear.

so if you had the c59 ring gear then your car would be geared higher.

"It might be possible to use the 19 tooth output shaft from the C150 in the S series transmission, but that compatibility has not been proven. You'd also have to press the gears off each output shaft, which can be time consuming or expensive. These are only possibilities, not actualities. Gear lash between the output shaft pinion gear and the ring gear will be affected if you change one without changing the other. The gear lash may be too great for your particular application, like if you switched to a 67 tooth ring gear when the pinion gear was designed for a 71 tooth, and such. Compatibility has not been proven with such ring gears in the S transmissions as gear lash must be considered and measured."

I find it unlikely, but not impossible someone would have gone through this trouble. If they did however it would still lead to a higher final drive as "C150 3.545 1.904 1.310 0.969 0.815 Diff: 3.526" Still higher then stock.

In fact looking at the numbers on that thread the s54 in the 6th gens has the lowest final drive of all of the options.

.... and then i saw ur post all the way down at the bottom.

"lets not forget the C160 and C60 final drive gear ratio. I have a 4.529 final drive gear ratio currently in my S54 Helical LSD transmission. Greater acceleration!! "

So your saying someone pressed the gears of of each output shaft and swapped out the output shaft and ring gear from a C160 or C60 trans into that transmission I sold you... Perhaps but ill believe it when i see pictures of the ring and pinion gear.

This post has been edited by BonzaiCelica: Jul 9, 2012 - 1:03 AM