What is Drac module?

What is Drac module?

DRAC is Digital Ratio Adapter Controller (TBI DRAC, GM DRAC, Buffer Module) VSSB is Vehicle Speed Sensor Buffer (TBI VSSB, GM VSSB, Speedometer Buffer) Replacement Modules for failed OE applications are readily available and in stock from UD Module.

What is a vehicle speed sensor buffer?

by lakeffect. Under the dash, attached on the left side of the flasher relay box, by the drivers left foot, is the vehicle speed sensor BUFFER. It is a small box about 2x4x3/4 inches. It splits the signal coming from the 4L60 to the sppedometer and ECM.

What is a digital ratio adapter controller?

The Digital Ratio Adapter Controller (aka. DRAC, and similar to the Vehicle Speed Sensor Buffer – VSSB) found in many General Motors vehicles from 1992+ are a good solution for obtaining a clean 5 Volt square wave signal from a VSS sensor in a noisy environment. The DRAC is contained in a small white plastic case.

How do I use the Hypertech speedometer calibrator?

Simply plug Hypertech’s Speedometer Calibrator into the vehicle’s under-dash connector, select the new tire height and/or new rear gear ratio, and in a matter of minutes, the vehicle’s computer is reprogrammed for accurate readings (as required by law).

What does GM Drac stand for?

DRAC is Digital Ratio Adapter Controller (TBI DRAC, GM DRAC, Buffer Module)

What is a Drac slang?

adj. slang Austral (esp of a woman) unattractive. [perhaps from Dracula’s Daughter]

Where is the Drac module located on a GM car?

The DRAC module is programmed to account for different tire circumferences and gear ratios. At the factory the correct external module could then be quickly installed while using identical guage clusters, speedometers, and engine control modules. It is usually located near the ECM, or behind the glove compartment, or under the dashboard.

Where are the vssb and Drac modules located?

It is usually located near the ECM, or behind the glove compartment, or under the dashboard. In the same fashion if gear ratios or tire sizes are changed, the module may be quickly swapped or reprogrammed for the correct ratios.

Which is an example of a Drac module?

Examples include driving aftermarket speedometers off DRAC and VSSB modules, and instrument cluster conversions and transmission conversions. Flat rate default service offering, whereby you can ask technical questions saving hours and days of your own research.

When do I need to replace my Drac module?

So you’ll need to have the info off the old module (typically removed). Select this module for speedometer calibration when tire size and or rear end gear ratios have changed from factory. We can calibrate for gear ratio or tire size combinations with great granularity with factory quality.