Rear Gear Ratio...

[89 240 SOHC]

anyone know what rear gear ratio a 1989 240sx 5-speed came with, also an automatic?

[virus77]

4.08 auto and manual are the same AFAIK

[89 240 SOHC]

Thanks.....trans ratios for the 5-speed?? just wanna know how screwed I am for top speed...

[masticatingcow]

I'm not sure what the exact ratios are, but you can expect your 5-speed to gear out at 161-163mph, assuming your final drive is stock. That's not rev limited or speed governed. At 3000 RPM in 5th gear, S-chassis cars are usually going 70mph, plus or minus one. Given that:

In 5th gear,

3000 RPM / 70mph = 6900 RPM / X,

your speed at redline in 5th will be about 161.

Stock transmission, stock final drive gear. Hope this helps.

EDIT: You can probably push it just a little harder, and if you can get an engine that revs higher, you're golden. Mate a KA transmission to a tuned CA, which has been known to rev up to 8000, and your top speed suddenly equals 186mph. Heh heh... good luck getting there, though.

[:: orion ::]

240SX 5-speed is the "FS5W71C"...

Gear ratios are:

1st........2nd......3rd........4th........5th3.321...1.902...1.308.....1.000....0.838

Rear end is 4.083:1, as mentioned.

- Brian