E_Luder

My local club has a groupbuy on Prodrive Final drive. What is being bought is a 4.7 final drive. I was just wondering what your thoughts are on this? Any problems with these gears? Anyone running them? What is the cost and involvement of installation?

Any info would be great!

bdb

Your from OPC, right?

Have you seen this thread:
http://www.preludeonline.com/showthr...hreadid=162578

These gears have been redesigned recently by Prodrive to be stronger. Many super high horsepower Civics (10 second drag cars) were breaking them during drag launches. Something that would be next to impossible on a near stock or even modified Prelude.

I beleive a few people here are running them; DR currently and Sun originally (long time ago). Anyone else?

Installation is involved as it requires the removal of the transmission and differential. It would be an excellent opportunity to upgrade to carbon synchros from Gear Speed and a Quaife diff.

Contact me if your interested via PM.

Artifex

Are you referring to the TPC?

Changing the final drive involves quite a bit of labor. I am in the process of servicing all my gears and synchros right now, and it requires labor, patience, and the right tools (or a machine shop) to get it right. In order to change the FD, you also have to swap out the mainshaft, since the FD counterpart is machined into it. In order to replace that, you have to completely disassemble the entire mainshaft, which requires a bearing puller to get the top bearing off. You can have a shop do it, but it will probably run you around $50.

Changing out the FD will improve you acceleration, but it will definitely mess with you top speed in each gear. 5th gear for highway cruising will be even worse than it is now. If you want to find out how bad, go to the gearing calculator.

I suggest that if you are opening the tranny that much, then install a Quaife while you are at it. Not much extra effort if you are going that far.

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bdb

OPC -- Ottawa Prelude Club.

kotetu

Anyone know whether or not there is a 0.7xx 5th gear (such as that in a Prelude S) that would fit in the 4th and 5th gen transmissions?

I've been told that the prelude S tranny 5th gear is incompatible.

But, if you get a .7xxx 5th gear and the 4.7xxx final drive, your 5th gear will remain virtually unchanged from stock, so you won't lose your highway gas mileage.

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