XKs Unlimited is proud to distribute the best five-speed conversions available. Theyre based on the tried-and-true Borg-Warner T-5 unit, but are hand-assembled with many custom components for each Jaguar application. Why install a five speed? First, as far as feel and ease of use are concerned, these gearboxes are worlds apart from the original Moss (aka non-synchro) gearboxes, which are pleasingly vintage but rough and slow. The Moss box was basically out of date in the mid fifties; it was woefully obsolete by the mid sixties and certainly not up to the standards of Jaguar engines or suspensions. Our five-speeds bring the transmission up to modern standards and eliminate whats arguably the most anachronistic feature of early Jaguars. Second, many internal components are no longer available for Jaguar gearboxes (even the later, all-synchro, units), so a five-speed is sometimes the only alternative to a terminally-ill standard box. Third, with a five speed, you obviously gain another gear, making for excellent 1-4 ratios and an overdrive fifth for more relaxed cruising at highway speeds. The following conversion kits are available. XK-120: A modified original bellhousing is used to mount this transmission in an XK-120 and retain the standard shifter location. Kit includes new transmission (not rebuilt), speedometer cable, shift lever, shift knob, clutch disc and drive shaft adapter yoke. The stock mechanical clutch mechanism, pressure plate and throw-out bearing are retained (replacing the pressure plate and throw-out bearing would be prudent, however). A new drive shaft must be fabricated. The standard gearbox supplied with this kit has the following first-through-fifth ratios: 2.95, 1.94, 1.34, 1.00 and .73. You must send your bell housing for modification.
This is a rebuilt part with a core charge. For more on core charges and our rebuilt parts policies, click the Documents tab and double click on “Core Information Sheet 8 10 2015.”