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#1
02-22-2003, 11:39 AM
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STD tranny ratios
Does anyone know the STD. civic tranny gear ratios and final ratio. its the 4 spd what i am talking about. I heard and looked up that it had the same 1st, 2, 3, and 4th as the DX and same final(3.88)but that it just didnt have the 5th gear.? COuld someone help?
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#2
03-08-2003, 04:10 PM
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I can't give you the complete answer to your question, but I do know a little bit, because I had an 89 civic hatch with the four-speed. It turns out it's actually a 3-speed transmission and 4th gear is an over-drive. It's true that in the 5-speed transmissions, that's actually a 4-speed and 5th gear is the over-drive.
Over-drive reduces your RPMs a certain percentage (as well as your torque), so you can calculate it by driving a certain speed in 3rd, shift into 4th, go that same speed and see the difference. Ok. That's all I know. I think the difference between your 3rd and your over-drive is about 12 or 15 percent. Over-drive increases your MPG by 12 or 15 percent. Flunky
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#3
03-08-2003, 05:19 PM
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__________________
********** My 94 SS ********** 90 civic dx 4 door d16z6 - p28, aem intake, act stage one clutch, cheap header- commuter car
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#4
03-11-2003, 04:53 PM
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Wow! That's good tranny info! Compare the final drive ratio of the DX and the SI. Si's have a numerically higher gear, which means they'll take off better, but will have to rev much higher to go the same speed as an LX on the top end.
Flunky PS-Check out the differences in the reverse gear. Any manual transmission will TOTALLY smoke an automatic, if you're racing in reverse!
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