This regular addition to Kit Car magazine offers readers answers to FAQs (or Frequently Asked Questions) as provided by some of the top manufacturers of kits, cars, parts, and accessories.
1. What problems can I expect when I install a shifter?
One of the problems you may encounter concerns the mounting location that is suitable for the vehicle and chassis. Most automatic shifters are cable-operated and fit a wide variety of vehicles. Mount the shifter on the floor or in the console and route the cable to the trans. The manual shifters are designed for specific vehicles and are not universal-fit shifters.
2. What is the difference between the shifters?
Most reputable shifter manufacturers offer several different types of shifters for automatic transmissions. These include ratchet-type, gate-type, and detent-type mechanisms. The ratchet-type is easiest to describe as a sequential shifter mechanism; its similar to a motorcycle shifter mechanism. This mechanism will allow you to shift one gear at a time with no missed shifts. The gate-type mechanism will allow the shifter lever to follow a pattern on a plate with stepped notches. The detent-type mechanism includes a spring-loaded device for locating each gear position. The manual shifters offered are generally internal rail models or they use the factory cable and rods.
3. Is there a difference in the link to the clutch between a five-speed and a six-speed?
The main difference in the clutch linkage is whether it is a mechanical or hydraulic system, regardless of whether its a four-, five-, or six-speed.
4. When should I use a six-speed as opposed to a five-speed?
The six-speed is often the most desirable, as it provides the additional gear along with closer ratios between gears. The closer ratios will allow the engine rpm to remain in its peak power band when gear changes are made. This may also prevent over-revving when downshifting.
5. What is the upside or the downside to a spring-loaded shifter?
Most manual shifters are spring-loaded to assist the driver in easily finding the Neutral gate.
6. What shifter should I choose for my car?
There are several mechanisms and styles of shifters offered for use in your kit car. First, decide on the mechanism type, then look at the styles offered that you feel would look best in your vehicle. Check the manufacturers catalogues for the shifter dimensions if the size of the shifter is critical.
7. Do automatic shifters have a provision for a Neutral safety switch?
Most universal-fit automatic shifters include a Neutral safety switch, or have provisions to operate with a switch found on the transmission. Check the catalogues or check with the manufacturer. (Note: All B&M universal-fit shifters include these safety setups.)
8. Why are most automatic shifters cable-operated?
Cable-operated shifters allow the shifter to be located wherever the driver desires. This will allow easier installation, especially in a kit car type of install.
9. What length cable is best for my kit car?
Manufacturers cable lengths vary, and it is best to check with them for specifics. B&M supplies a 5-foot cable with its automatic shifters. This length is suitable for most applications; however, if another length is required, several other lengths are available.