Gearboxes

Gearboxes

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UUC Motorwerks Red Bolt-Through Transmission Mount Pair Bushings BMW E36 | E46 All Models

Red urethane bolt-through transmission mount bushings are the strongest choice. A single bolt through the entire piece eliminates any possibility of bushing material failure even under the most abusive conditions. Offers effectively the same drivetrain motion control as a solid delrin or aluminum mount, but with some vibration isolation to reduce vibratory

UUC Motorwerks Blue Isolated Transmission Mount Pair Bushings BMW E36 | E46 All Models

These are fully isolated, having two seperate mounting bolt hardware pieces embedded in the material just like the black neoprene and OE BMW bushings. The urethane is a higher durometer (stiffer) material than the neoprene and offers nearly the same drivetrain motion control as a solid delrin or aluminum mount, but with significant vibration isolation. That

UUC Motorwerks Black Isolated Transmission Mount Pair Bushings BMW E36 | E46 All Models

New mechanical retention system on all UUC isolated transmission mounts (red or black) and engine mounts. This design uses a bonded end plate plus an inner plate embedded in the urethane. This inner plate prevents separation of the mount assembly even under excessive

Torque Solution Brake Master Cylinder Brace Nissan GT-R R35 09-20

Torque Solution Brake Master Cylinder Brace is the perfect complement for the serious enthusiast that demands the most from their vehicle. Installing our brace will help to reduce firewall flex during braking and increase overall brake pedal feel. The brace mounts to preexisting holes making for an easy install with the supplied hardware. Features: CNC

£173.85

TiTek Differential Rear Brace Nissan GT-R R35 09-20

During a full day at the drag strip, the differential can and will literally rip itself apart from the front half of the casing over time. TiTek s new GR6 differential brace helps prevent that from happening on hard launches. The result of actually breaking/separating the diff and front casing? NOT being able to buy a new case from Nissan. And a brand new

£387.28

South Side Performance Transmission Cooler Nissan GT-R R35 09-20

South Side Performance Transmission Cooler Nissan GT-R R35 09-20 The SSP Performance transmission cooler will increase the life of your transmission by keeping it cool. Kit contains an extended sump pan cut from billet aluminum with a finned surface to increase cooling, a high volume pump to ensure the oil moves freely, two electric fans to assist in

£1955.17

South Side Performance RS Rear Axle Upgrade Nissan GT-R R35 09-20

South Side Performance RS Rear Axle Upgrade Nissan GT-R R35 09-20 In months of testing R35’s running very aggressive power combinations, SSP has thought a few steps ahead and engineered a few of the pieces that will be needed once your GT-R starts pushing big power. SSP has experience with high horsepower AWD cars and knows that the axle shafts are

£1876.92

South Side Performance GR6 Deep Transmission Pan Nissan GT-R R35 09-20

South Side Performance GR6 Deep Transmission Pan Nissan GT-R R35 09-20 When running your GT-R hard on either the track or the street, it is important to protect your transmission. South Side Performance has developed the GR6 Deep Transmission pan to help do just that. The deeper pan allows for more fluid to be ran. The extra fluid, along with the design of

£1016.31

South Side Performance GR6 800hp Clutch Pack Nissan GT-R R35 09-20

When modifying the Nissan GT-R, one of the most crucial upgrades you can perform is to the transmission. South Side Performance has the GR6 700hp clutch package that will help put the power to the ground safely. Their use of high grade materials and precision manufacturing makes their GR6 clutch packs the best of the

£1251.03

South Side Performance GR6 700hp Clutch Pack Nissan GT-R R35 09-20

When modifying the Nissan GT-R, one of the most crucial upgrades you can perform is to the transmission. South Side Performance has the GR6 700hp clutch package that will help put the power to the ground safely. Their use of high grade materials and precision manufacturing makes their GR6 clutch packs the best of the

£1016.31

South Side Performance GR6 1000hp Clutch Pack Nissan GT-R R35 09-20

This 14 disc clutch package by south side performance is designed to strengthen the GT-R;s transmission to support 1000hp applications. SSP has designed, developed and tested all their products on the track and the street. If you want to put the power to the ground, this 14 disc GR6 1000HP clutch package is the way to

£1564.76

HKS Transmission Gear Kit with Clutch Nissan GT-R R35 09-20

HKS has developed a new Transmission Gear Kit with Clutch for ultimate power support for R35 GT-R. They have tested over and over in severe environment with HKS GT1000 spec with slick tires at circuit for time attack. This is it! The ultimate Transmission Gear and Clutch for the ultimate capability of torque. Clutch Pack: It’s super capacity and total

£29730.44

HKS Dual Clutch Trans Cooler Kit Nissan R35 GT-R VR38DETT 12-20

DCT Cooler Kit for GT-R R35 is available now. From the street to race circuits, the HKS DCT Cooler Kit for the GT-R has been developed to provide firm and positive shift engagement while assisting in the prevention of overheating the clutch and transmission. By stabilizing and maintaining lower oil temperatures in the transmission, the life cycle of the oil

£1955.95

HKS Dual Clutch Trans Cooler Kit Nissan R35 GT-R VR38DETT 09-20

DCT Cooler Kit for GT-R R35 is available now. From the street to race circuits, the HKS DCT Cooler Kit for the GT-R has been developed to provide firm and positive shift engagement while assisting in the prevention of overheating the clutch and transmission. By stabilizing and maintaining lower oil temperatures in the transmission, the life cycle of the oil

£1701.68

HKS Differential Oil Cooler Kit Nissan R35 GT-R VR38DETT 09-20

Differential Oil Cooler Kit for R35 GT-R is released now. High performance vehicle R35 GT-R s differential oil temperature tends to be very high under severe conditions such as circuit driving. High differential oil temperature may affect on the lubricant performance and/or LSD s performance maintenance. HKS Diff Oil Cooler Kit was developed to solve these

£1955.95

HKS Clutch Pack for HKS Transmission Gear Kit Nissan R35 GT-R VR38DETT 09-20

HKS has developed a new Transmission Gear Kit with Clutch for ultimate power support for R35 GT-R. They have tested over and over in severe environment with HKS GT1000 spec with slick tires at circuit for time attack. This is it! The ultimate Transmission Gear and Clutch for the ultimate capability of torque. Features: 8 Plates 100% More Joining Pressure

£9388.56

HKS 20 Liters Dual Clutch Transmission Fluid DCTF-II Nissan GT-R R35 09-20

Comes in a 20 liter container. Compared to the OE fluid (GR6) in R35, HKS oil improve the low temperature fluidity, to achieve smoothness for everyday use, enhanced oil film properties at high temperatures. High load performance is also improved. OE fluid is expensive. HKS oil is 100% synthetic base oils and reliable. Features: Improve Low Temperature

£621.99

HKS 20 Liters Dual Clutch Transmission Fluid DCTF-I Nissan GT-R R35 09-20

Comes in a 20 liter container. Compared to the OE fluid (GR6) in R35, HKS oil improve the low temperature fluidity, to achieve smoothness for everyday use, enhanced oil film properties at high temperatures. High load performance is also improved. OE fluid is expensive. HKS oil is 100% synthetic base oils and reliable. Features: Improve Low Temperature

£621.99

GT1R Tilton R35 Flywheel Nissan R35 GT-R 09-20

T1 Race Development does all of it’s own research and engine development in-house, on our own vehicles. Our goal is to ensure that our all of our customers have a tried and true experience with their Nissan GTR’s performance. They say if you aren’t breaking things you aren’t making enough power. Sucks being on the receiving end of

£765.17

GT1R Pro Level Rear Axle Nissan R35 GT-R 09-20

T1 Race Development does all of it’s own research and engine development in-house, on our own vehicles. Our goal is to ensure that our all of our customers have a tried and true experience with their Nissan GTR’s performance. GT1R DSS Pro Level Rear Axle Nissan R35 GTR 115mm CV Pro-Level Rear Axle / 33 Spline Hub Kit with 2-Piece 300M

£2699.20

GT1R CNC Rear Differential Cover Nissan R35 GT-R 09-20

T1 Race Development does all of it’s own research and engine development in-house, on our own vehicles. Our goal is to ensure that our all of our customers have a tried and true experience with their Nissan GTR’s performance. GT1R CNC R35 Rear Differential Cover Build it, break it, make it stronger, it’s a theme that tends to go with

£1290.93

The Knowledge

THE KNOWLEDGE

Gearboxes

What is a Gearbox?

A gearbox, also known as a transmission box, is a synchronized collection of gears housed together in a metal casing. This mechanical device affects your car’s road performance. As an integral part of the vehicle’s powertrain, it usually ranks second after the engine.

How a Gearbox Works

A gearbox affects your vehicle’s torque and speed. Torque refers to the car’s ability (power needed) to overcome obstacles on the way through wheel traction. As for speed, it refers to how fast your car goes (mph). Your gearbox output is dependent on two things: your engines speed and power. Your engine’s power is defined by its speed; how many revolutions per minute your crankshaft makes. So for your engine to produce more power, it needs a high RMP, and this means more gearbox output. In other words, your gearbox transmits your engine generated power to the wheels and ratios the transmission to provide different speed variations for different road applications. Take for instance when driving uphill, you require more wheel power (torque) than speed. Your gearbox thus provides high torque to help you overcome resistance while giving a low-speed transmission to keep you steady on the ground. Another great example is when driving fast on a leveled ground. Your gearbox provides more speed transmission to help you move quickly while maintaining low power output for momentum.

Gearbox components

To better understand how your gearbox works, you need to know the different parts and how they work to fulfill a harmonious function:
  • Input Shaft: It’s what connects the gearbox to the engine. It carries the same power and speed as the engine’s crankshaft.
  • Counter Shaft: It's the intermediate shaft that joins the input shaft to the main shaft through fixed gear. The countershaft is also known as layshaft.
  • Output shaft: This is the main shaft, and it lays parallel to the layshaft. The output shaft is responsible for transmitting the engine’s power to the rest of the powertrain. Its speed and power transmission are dependent on the gear engaged.
  • Bearings: They are located on both the main and countershafts. Bearings help reduce friction.
  • Drive gears: A drive gear usually consists of a pair of gear wheels. One is located on the output shaft and the other directly beneath is on the countershaft.The drive gear system works by transmitting power from one shaft to the other. The gear ratio determines the produced power. By gear ratio, we mean the ratio of the driven gear-wheel teeth to the driving gear-wheel teeth.The higher the ratio is to one, the lesser the rotating speed of the main shaft and the more torque it has over the countershaft. If the ratio is less to one, the higher the rotating speed of the main shaft and the less torque it has over the countershaft. In brief, the bigger the gear, the more resistant it is to rotate and hence the higher its gear ratio.

Different types of Gearboxes

There are two types of gearboxes: manual and automatic

1. Manual transmission gearbox

This type of gearbox allows the driver to select different gear ratios depending on the application needed. However, you need some particular skill set for such vehicles. A Manual gearbox is ideal for performance cars. Depending on the design, a manual gearbox can be categorized as:
  • Sliding mesh gearbox: This is the oldest type of gearbox and usually involves meshing (connecting the main shaft gear to the countershaft gear) gears by sliding. Such gearbox requires extra skill and tends to wear out quickly.
  • Constant mesh gearbox: It’s a popular gearbox among 20th-century cars. Unlike the sliding mesh gearbox, the constant mesh gearbox wears out less and is quieter. All gears are meshed continuously together but not connected. The main shaft gears rotate freely from the countershaft gears. The constant mesh gear also includes dogging clutches located on the main shaft.
  • Synchromesh gearbox: This gearbox tends to resolve the problems associated with constant mesh gearbox. It replaces the dog clutch with synchromesh devices. The gearbox works on the principle of synchronizing the speeds of two gears by bringing in frictional contact before engaging them. Currently, it's the most uprated gearbox in manual cars.
How a manual gearbox work In manual cars, the power of the engine is introduced to the gearbox via the input shaft. However, the speed/power leaving the gearbox (output speed) is dependent on the gear ratio – different speeds of the meshed gears. A manual gearbox tends to have a single gearwheel pair for each speed.

2. Automatic gearbox

An automatic gearbox allows automation of speed variation with no driver’s intervention. The accelerator when pressed or released determines the timing, selection, and engagement of gear in question to the speed required. Automatic gearbox doesn't make use of pedal clutches and gear change levers. There are two types of automatic gearboxes namely:
  • Epicyclic gearbox: It achieves different gear speeds through tightening of brake bands on gear drum.
  • Hydraulic torque converter: It works the same as an electric transformer.