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| Install and Review of Superlift Truespeed | Short Cuts | ||||
| by: Stevan Gajic |
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Introduction
Once upon a time, changing a gear in your truck's tailshaft was all it would take to recalibrate your speedometer for bigger tires, deeper gears or any other modifications to the driveline. On todays modern 4x4's electronics monitor your wheels for ABS and speedometer, there is no more phyisical link. Oversized tires can affect how your truck goes, how it stops, the odometer will be off, and worst of all, you're more likely to get speeding tickets from not knowning how fast you're going. This is also true if your snow tires are a different size than your summer tires.
Fortunatley Superlift has the solution. An electronic ratio adapter, or ERA, which hooks inline between the ABS computer and the main computer. This is done to avoid affecting the ABS or RWOL, depending on which you have, but still to provide acurate information to the computer about speed and distance. Add to that the nice feature of being able to switch between 2 tire sizes if you use one size for off-road and the other for the street, or if you use one size for winter tires and another during the summer.
Installation
Begin by laying out the contents of the kit on your workbench. Make sure you have everything and understand how to hook it up and how to remove it later if nesicary Always follow the directions and if you run into trouble, the guys at Superlift will be more than happy to help figure it out. Find a place in your interior to mount the main box. You want it to be in a concealed, dry place that you can get at to adjust later. Find a hole in your firewall to run the wiring through, or drill one, and don't forget to make sure to have a gromet in there to keep from chafing through the wires.
Once you've picked out a mounting spot, attach the box with the provided velco strips. Figure out a good chasis ground location first. Run the ground wire (black), trim to fit and install the provided ring terminal. Bolt it down. Pick a heavy fuse from you block which is ignition hot and install the provided add-a-circut kit. A little plastic trimming on the fuse block will be needed. I chose the power window circut as the source because of the 40 amp fuse, the ignition hot wiring, and the lack of a constant load on that ciruct. Run the power wire (red) and cut off the excess length. Install the provided terminal and hook it up. Already half way there.
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Now the fun part, run the green and yellow wires through the
firewall. Unplug the ABS module harnes and remove the electrical tape holding
the sheathing shut. Find the wire specified in the directions, it's diffent
for different year models and vehicles. cut the wire and attach the input and
output wires with the provided solder connectors. Use plenty of electrical tape
and reassemble everything. Take the truck for a test drive and make sure the
speedometer works. If not, check all your connections, and both the fuse with
the add-a-circut and the inline fuse for the ERA Next use the chart provided
to figure out how much to adjust the ERA to correct your speedometer, or if
you know the percent change, 1/4 turn is 0.5% change in speed reading. Once
you have the adjustment pots configured the way you want them, grab a GPS, or
a friend with one, or a friend with a radar gun and take a ride to confirm your
setting. If you don't own a GPS or know anyone that does, you can use your trip
meter and the mile markers on the local freeway to confirm you settings. The
ododmeter should turn exactly 1 mile per mile marker.
| Contact Info | Related Links |
| Superlift Suspension Systems
211 Horne Lane West Monroe, Louisiana 71291 Phone: 800-551-4955 Fax: 318-323-5995 website: www.superlift.com. |
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