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Installing a TKO into a 1964-67 Mustang

Installing a TKO into a ‘64-67 Mustang already equipped with toploader manual transmissions is a relatively simple task. Your clutch, bellhousing, speedometer, slip yoke and driveshaft will work.   You will need to modify the cross member, and you’ll need to “lift” the tunnel about 1” to have enough clearance.

Here’s some “tunnel surgery” info.

For a TKO 5sp, you’d need the TKO slip yoke and a 26 spline clutch disc.

For a 428 Cobra Jet, you’ll need a Clutch disc, pressure plate, throw out bearing, fork, cross-member and again, the tunnel needs a little massaging. There is a cross-member out there that drops the back of the tranny for more clearance, but thats not the right way to do it.  The correct way is to lift the tunnel.  Your driveshaft will be the same length as stock, and you can use your bellhousing without an adapter plate.


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This website is a comprehensive collection of information regarding the installation of TREMEC transmissions into various vehicles. Material contained in here may be reproduced for PERSONAL USE ONLY. No material may be redistributed in electronic or printed form without the written permission of Brad Wedan (owner). Owner believes to the best of his knowledge this information to be correct, however no warranty is made as to its accuracy. Owner also disclaims any liability for financial loss, property damage or injury in connection with use of this information. Not affiliated with, endorsed or compensated by TTC, or any sanctioning body mentioned within. Any trademarked names are property of their respective trademark holder and are used for identification purposes only. Portions of this website may be copyrighted by other individuals or organizations.

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