Editing Tucker 48 (section)

=== Transmission ===

With the horizontal, between-the-wheels 589 motor and its double torque converter(s) (and no reverse) drive system out, Tucker now needed a transmission to mate with the Franklin O-335. This motor was also horizontal, but its driveshaft pointed towards the front of the car. It was discovered, after a few sketches were made, that it was theoretically possible to adapt a previous transmission design intended for [[FF layout|front-engine/front wheel drive]] use. This transmission served as a temporary "fix" for a very real problem for the success of the Tucker.

==== Pre-Selector manual transmission ====
It was discovered that the [[Cord 810/812]]'s Auburn Gear, front-wheel-drive; 4-speed transmission, with the Bendix "Electric Hand" electro-vacuum shifting mechanism, fit the immediate design requirements needed to get the cars built, and on the road; until a future automatic (Tucker-built transmission) was worked out. This transmission was designed originally behind a standard V-8 engine, and pointed forward towards the front of the car, for the front wheels. However, this transmission came with a poor reputation, following its original use, in the [[Cord 810]] automobile. (In 1936, when the Cord 810 made its debut at the New York Automobile show, the transmissions were so problematic that 810 models were mostly shown without any transmission installed. Problems abounded until the last Cord was produced in 1937.) The Cord transmissions, even with refurbishing, were initially inadequate for the power and torque of the O-335 engine. The Cords lacked adequate lubrication and the main shaft was so long that it warped under load (causing gears to pop out of play), and the gear-teeth were quite weak. Nevertheless, in the Tucker, this transmission worked well enough for the new engine configuration; it provided an adequate (albeit fragile) transmission, with a reverse gear. The company then sent several of its staff, including Preston Tucker Jr., on a campaign to buy used Cord transmissions, for reconditioning; a total of 22 used transmissions were acquired from junkyards and used car dealers. These transmissions were taken to the Ypsilanti Machine And Tool Company. After refurbishment, several were mated to the O-335 and found to work, providing four speeds forward and reverse. It was decided, consequently, that the Cord design – nearly 12 years old – would become the "manual transmission" for the 1948 and subsequent Tucker automobiles. About 18 of the 22 Cords were found to be usable and – since newly made Y-1 transmissions were not yet available – were installed in production Tucker vehicles. Several of the cars have survived with Cord transmissions.

==== Ypsilanti Y-1 transmission ====
Ypsilanti Machine and Tool Company, which was tapped to recondition the Cord units, began immediately redesigning the transmission for mass production for Tucker. This new design, which had few similar parts to the Cord transmission, still used the same basic indirect transmission design, but had all new gearing, shafts and electro-vacuum controls. Tucker and his engineers modified it, installing stronger gears and lengthening the case. The modified Cord transmission was named the Tucker Y-1 (Ypsilanti-1) and was installed in a few Tuckers. Both also used a Bendix designed electric vacuum shift mechanism with no mechanical linkage to the steering column shift lever. These EVS's had problems of their own with electrical connections and vacuum leaks that hindered shifting, so a new fully mechanical shift design would have been needed, had the Tucker made it into 1949.

==== Tuckermatic drive ====
[[File:Tucker335andTuckermaticR12.JPG|thumb|Tucker 335 engine and Tuckermatic R-1-2 transmission (trans recovered from car #1042; note second torque converter on the end)]]
To solve the transmission problems with a new final transmission design, Warren Rice, creator of the [[Buick]] [[Dynaflow]] transmission, was consulted. A unique [[continuously variable transmission]] called the "Tuckermatic" was designed, which was strong enough to handle the Franklin O-335's power and torque. It was a simple but effective design with a single, rear-mounted torque converter and only 27 basic moving parts which was about 90 fewer than normally required for a contemporary automatic. The variable pitch torque converter allowed a continuously variable drive ratio with two forward gears and one reverse gear. 

The only surviving car with a Tuckermatic installed had a standard column shift lever, with a three position quadrant on the steering column. Up was reverse, the middle was neutral, and down was drive. Due to the Tuckermatic's design, no lower gear selections were necessary, hence there was no need for a multi gated selector like other automatics.

Three versions of the Tuckermatic were made: the R-1, R-1-2, and R-3 (R for Warren Rice, its designer). The first version, the R-1, was not installed on any of the final cars. It required the engine to be off in order to select a gear. The R-1-2 was improved by adding a [[layshaft]] brake to allow gear selection while the engine was running. This version was installed on cars #1026 and 1042 only. The R-3 version had further improvements including a [[centrifugal clutch]] to help shifting between forward and reverse even further, and may have been destined for car #1048 for further testing.

Because the external torque converter on the Tuckermatic made the engine-transmission unit longer, the fuel tank in the Tucker 48 had to be moved from behind the rear seat to in front of the dashboard for all Tuckers from car #1026 forward, even though only two of them actually had the Tuckermatic installed. This had the added advantage of improving weight distribution in the car.

==== Other drives contemplated ====
A Borg-Warner based, 3-speed automatic was supposedly tested and was installed on car #1048 at some point when the company was in business, although no histories written ever mentioned such a drive. That said, Tucker ultimately wanted to design his own transmission for the final car, which came to fruition with the Tuckermatic. In 1949, #1048 was sold at the receivership auction without a transmission installed. Today, #1048 has the 4 speed pre-selector transmission that was used on all but two of the original 50 pilot models. It is likely this transmission was privately installed after the auction, and that the unit was the Ypsilanti-built Y-1 transmission.{{Citation needed|date=January 2021}}