Quote:
Originally Posted by SuperCow
Why would you want to change the speedo gears?
Is measuring the output shaft right?
So then only your dif en wheelsize matters?
Only if Mercedes would use different gearing in de speedogears?
So i would figure if you only change the gearbox but not the dif, you don't need a other speedometer. If you change the dif aswell, then you need a other speedometer
(btw you do need a longer speedocable, the 4-speed doesn't fit)
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The gearing of the speedometer is fixed at the gearbox but it is "geared" for a specific differential ratio (and a standard set of tyres on a standard set of wheels). Change the size of the wheels and you'll change the output seen at the needle on the gauge.
Change the differential - which is essentially what I'm doing as far as the gearbox is concerned - and you'll see a much bigger change than swapping tyre sizes. [Unless you've put a 5 ft lift on the suspension and a set of tractor wheels!]
The five speed gearbox expects to "see" a 3.64 differential. I have a 3.46 fitted which is correct for the 4 speed.