The activity of a vehicle’s transmission is to ensure that the perfect measure of intensity goes to your wheels to drive at a given speed. It works by changing gears in a fundamentally the same as design to what you see on a multi-speed bike. The mechanical gearbox is still the most common engine torque changing device. The name of the gearbox is derived from a mechanical (manual) way of shifting.
In the manual gearbox the torque in the gearbox is changed in stages. A step (or gear) is a pair of cooperating gears. Each stage provides rotation with a certain angular speed or, in other words, has its own gear ratio.
The transfer numberis the ratio of the number of teeth of the slave pinion to the number of teeth of the master pinion. Different gear stages in the gearbox have different gear ratios. The lower gear stage has the largest gear ratio, the higher gear stage has the smallest gear ratio.
Depending on the number of steps there are four-, five- and six-speed gearboxes and higher. The five-speed gearbox is the most common on modern cars.
From all the variety of designs we can distinguish two main types of gearboxes: three-shaft and two-shaft.
- Three-shaft gearbox is installed, as a rule, on rear-wheel drive cars.
- The double-shaft manual gearbox is used on front-drive passenger cars.
The design and principle of operation of these gearboxes have significant differences, so they are considered separately.
A car with an automatic transmission has a torque converter that senses these changes as you accelerate and shifts you to a higher gear. The same process works in reverse as you slow down.
What car came with w58 transmission?
The steel sandwich plate has some minor internal differences, and it is believed to be slightly stronger (some wider bearings, some wider gears, slightly different gear selection mechanism, etc.). In theory, the all-alloy version of the W58 should be the exact same strength as any other all-alloy W-Series transmission. The steel plate version is considered much harder to find and worth approximately three to five times as much as an all-alloy version.
This unit is popular as a replacement for weak stock transmissions in other vehicles. It came in two varieties: the original found in the 1982–1989 non-turbo Supras, Celicas and Cressidas of the early 1980s; and the later version found in Mk3, Mk 4 Supras and Lexus SC 300s. Here is the exact list:
- 1982-1986 Toyota MK 2 Celica Supra
- 1986-1992 Toyota MK 3 non-turbo Supra
- 1993-1998 Toyota MK 4 non-turbo Supra
- 1986 Toyota Cressida
- 1986 Toyota Soarer
- 1982-1992 Lotus Excel
- 1992-1997 Lexus SC300
- 1998-2005 Lexus IS300 5 speed
What is a r154 transmission?
The R154 is a transmission that is manufactured by the Toyota Motor Corporation in Japan. Toyota’s R-series of transmissions are known for being 5-speed transmissions. This means they have a 5-speed gearbox that includes 1 reverse gear and 5 forward gears.
What is special about the R154 is how well it is constructed and designed. It is very easy to recognize the strength and power of the gearbox when you see it in action. This strength comes from the size of the gears and the external casing. They were made this size to ensure the transmission performed all the time wonderfully.
How much HP can a w58 handle?
Toyota Motor Corporation’s W family is a family of RWD /4WD transmissions built by Aisin. Physically, these transmissions have much in common (like the bell housing-to-body bolt pattern) with other Aisin-built transmissions, like the Jeep AX-5 and the Toyota G-series. The W55, W56, W57, W58, and W59 are very similar aside from the gear ratios. W58 hp limit is about 350whp. Hpisn’t the issue though, it’s the torque.
How can you tell r154 from w58?
Up until 2004, you could find 5-speed transmissions in the Toyota Soarer, Toyota Cresta Tourer V, Toyota Mark II Tourer V, Toyota Chaser Tourer V, Toyota Crown, and the MKIII Supra Turbo.
The Aspect Ratios of the transmission are:
- 3.251 for the First Gear
- 1.955 for the Second Gear
- 1.310 for the Third Gear
- 1.00 for the Fourth Gear
- 0.753 for the Fifth Gear
- 3.18 for the reverse gear
- also 3.727 for the final drive (Mechanical LSD)
R154 is the right shifter length to swap into an SC300, SC400, GS300, GS400, and MK4 Supra. With a little trimming around the shifter opening on the floor, we have seen these installed into 240SX, IS300, and many others. This transmission includes a 1JZ bell housing, which allows it to bolt up to any JZ engine. It also includes fork support if you purchase the transmission with the 1jz bell housing. It does NOT include a speedo gear. If there are no access panels on it, it is an r154. You can also tell by the slave cylinder. The slave cylinder you have pictured is a w58 slave cylinder, the bleeder screw is at a 90* to the inlet hose.