JT5 Conversion Notes Thank you for purchasing this custom World Class JT5 transmission designed for the Jaguar 6 cylinder E type platform. These transmissions are assembled with higher quality control standards and closer tolorancing than factory built Borg Warner T5's. Medatronics Corporation's Autodyne division has been involved in the T5 program since 1983. Autodyne is a remanufacturer of standard transmissions for General Motors, transmission chains such as Aamco and various repair facilities for over 15 years, worldwide. Since these transmissions are designed for the Jaguar platform they will make E Type conversions easy and cost effective. They are designed to bring the shifter, and transmission mount within a reasonable mounting range for various kit designers as well as give your customer a transmission that requires no modifications to the floor. Converting to JT5 allows for cheaper replacement parts and longer parts availability. Below are some suggestions for creating beautiful JT5 conversions. Most people are modifying existing manual shift bell housings to accept the JT5. If you decide to use an adapter plate you will have to make an extended crankshaft pilot bushing, otherwise the factory bushing will work fine. We can supply longer input shafts on certain models to correct for up to 3/4" of back movement. The shifter, and cross member mounts are within range to compensate for 1/2" movement as well. Here are some useful measurements: Measurement Location Jaguar JT5 Front mounting face to end of tail housing 12.25" 15" Front mounting face to transmission mount C/L 12.75" 14" Front mounting face to shifter C/L 12" 11.75" Front mounting face to end of input shaft 7" 7" Input shaft pilot bushing diameter .492" .492" JT5 Mounting After modifying a bell housing or creating an adapter plate. A simple steel plate is all that is required to extend the transmission mount pad back to meet the factory mount location. The bolt pattern for the mount is a standard GM type. Various mounts with this bolt pattern are available in many offsets and heights. Shifter Mounting The shifter stub supplied allows for direct welding of the factory stick or welding of a bracket to accept the factory stick. We also sell a heavy duty JT5 billet shifter. JT5 HD shifters have provisions for a bolt on stick or bolt on adapter bracket. JT5 shifter knobs and sticks are available also. Speedometer Installation Since the JT5 for the 6 cylinder E type is so short. No provisions for a speedometer cable are available. An electronic speedometer conversion kit is available from us but requires an exchange speedometer unit. Drive shaft Installation The slip yoke supplied with the JT5 bolts to the existing front driveshaft flange. Using this yoke with a drive shaft is an advantage because you make a solid shaft with no slip spline. Calculate the drive shaft length by pushing the slip yoke in the JT5 until it stops and pull it out 1/2". Measure the distance from front and rear axle universal joint center lines to determine the length of the drive shaft. You install the JT5 by slipping it on to the shaft in the tunnel rather than trying to bolt flanges together. Lubrication We recommend DEXTRON II or III oils. Do not use conventional 80w-90w gear lube. Use of any gear lube will ruin the synchro rings and cause lubrication problems. Backup LIght Switch The JT5 comes with an integral back up light switch. An adapter harness is supplied to make the hook up easy. Service Parts We stock a complete line of OEM service parts. We also carry rebuild kits for these transmissions that include all bearings, blocking rings, seals, sealant, small parts, and shim packs. Important Clutch Notes E Type 6 cylinder standard shift bell housings can be modified to fit the JT5 bolt pattern and still use the factory clutch linkage mechanism. An automatic bell housing can also be modified to accept the JT5. If an automatic bell housing is used a hydraulic release bearing must be fitted to the JT5. Hydraulic release bearings can be supplied at an extra cost, but must be ordered with the JT5. A 9.5" FORD clutch disk must be used with a 10 spline 1 1/16" dia. hub. The JT5 is fully synchronized in all 5 forward gears. It has a non synchronized reverse gear. All mainshaft gears are on needle bearings and all blocking rings except for 5th gear are of fiber composition with a dual cone design on 1st and 2nd gear.The weight of a 6 cylinder JT5 is 68 lbs. These gear sets are rated at 330 Ft. Lbs. static torque. Popular JT5 Gear Ratios Standard Jaguar 4 Speed Ratios 1st 2nd 3rd 4th 5th 1st 2nd 3rd 4th 3.35 1.99 1.33 1.00 .73 3.37 1.86 1.28 1.00 2.95 1.94 1.34 1.00 .80 2.94 1.90 1.39 1.00 Other JT5 Products Heavy Duty Billet Shifter. Rebuild Kit ( includes all wearable parts). Heavy Duty 10" clutch disc. Custom billet shift knobs and handles. JT5 for the 12 Cylinder E Type Medatronics also manufactures a JT5 for 12 cylinder E Type Jaguars. This 5 speed incorporates the same features as the above transmission but is longer to fit the12 cylinder floor. We have noticed that the majority of 5 speed conversion kits require extensive floor modifications. Because the Jaguar 12 cylinder hydraulic slave cylinder mounts on the transmission, the JT5 uses an integral hydraulic release bearing. Thank you for choosing Medatronics and the JT5!