Author Topic: Gear Ratios & Final Drives  (Read 2891 times)

davidbuttigieg

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Gear Ratios & Final Drives
« on: 13:20, Thu 05 July 2012 »
Has anyone ever messed with these by interchanging parts from other gearboxes ??

I found this manual ( http://www.scribd.com/doc/2490905/Renault-Gear-Boxes ) and it shows the gear and differential ratios for all JB3 gearboxes...

Now, basically I would like to lower my gears and I though I'd start by using the differential crown wheel and main shaft from another gearbox, which obviously has a lower final drive. I was looking at the manual and I found that the JB3 009 / 014 / 032 (these are the GTT gearboxes) have a 3.73 final drive and gear ratios : (1) 3.09 , (2) 1.84 , (3) 1.32 , (4) 0.97 , (5) 0.76.

While the JB3 048 (clio 16v) has a 4.2 final drive and identical gear ratios apart from 5th gear which is a little bit higher.

Last time I drove a 16v it felt completely the opposite; very high gears and a large difference between 1st and 2nd gear.

What gearbox can I use or else what crown wheel and main shaft can I fit into my gearbox to get lower gears ? (actually at the moment I have a gearbox from a R5 GTX which is very similar to the GTT but a little bit higher & I run a volvo engine, if that makes any difference)

davidbuttigieg

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Re: Gear Ratios & Final Drives
« Reply #1 on: 19:22, Mon 09 July 2012 »
anyone ?!