slim

I will never fit a 'tuning' box. I'd get the car remapped properly on a rolling road. but I won't do that either as there would be next to no power gains being a naturally aspirated engine. I just want to run it at lower rpms to see if I can get an extra 100mi to a tank as I drive a lot of motorway. was posting here to see if anyone else has done this, but if nobody has, im thinking of fitting a pd140 gearbox. unless anyone can suggest a better box to use. cheers!

Im wanting to retrofit a 6 speed gearbox in my 2008 mk5 golf 2.0L SDI which is currently 5 speed. can anyone tell me a good 6 speed box to use, bearing in mind the sdi is a very low power engine, I just want better mpg from it cruising on the motorways etc. I NEED A GEARBOX THAT IS 6 SPEED BUT NOT TOO HIGH GEARED THAT IT DOSENT MOVE! HAS ANYONE DONE THIS BEFORE CANT BE JUST ME WANTING CHANGE!