Thread: SPEEDO CORRECTION....With a Marks Adaptor??

Alrighty then ....

The Superlift/Truspeed modules don't seem to be made any more or if they are, their marketing department is shocking.

I purchased a correction unit from Hunter Di directly. He doesn't have a website but there is an email address you can contact him on. For the princely sum of $176 I was sent out the appropriate unit and now I just have to install it. Slunnie's pics of the install he did will come in handy here.

When I got the unit I was scratching my head with how I was going to calculate the pulses, Hz of the speedo etc in order to calibrate the unit. There is a couple of sheets with the unit that detail the ratio change and the switch positions to achieve that.

The easiest way to correct is to go from the 1:1 ratio (stock signal) and then apply the correction % for your vehicle. Eg. If you are doing an actual 110km/h at an indicated 100km/h you need to set the correction to 1 : 1.1. The plus with this is you can run multiple tyre sizes and apply a correction for each tyre size, noting the ratio on the table.

Now to set it, wire it up and trust my speedo!

let us know when its setup

I fitted one of these to my Defender td5 so I can run the Roverdrive overdrive in 5th gear.
Speedo healer, you can get them on ebay

Ashcroft Transmissions


Paul.

I got one from hummingbird electronics, works well, heaps of adjustment and made in Australia.