I've just had a very expensive rebuild done on my MK8 DG250 auto, but one issue (not a fault with the gearbox) still bugs me, as it has for the 35 years I've owned it. This is to do with the high revs while cruising. I know what's being shown is to spec, but it is irksome, perticularly on a long journey. At 60mph it indicates over 3000rpm, whereas my more modern XJL indicates around 1300rpm at the same speed. I don't expect the MK8 to do the same as the XJL, but I suspect the constant higher revs must have an impact on fuel consumption and engine wear. Has anyone come up with a work-around to help with this? I thought of changing the diff ratio, but this affects all gears, when I only need to modify top gear. Can an overdrive be put on the back of an auto box? Any other ideas? Thanks

 

Welcome aboard Henry, for information on your MK8 just ask questions here.. https://www.jaguarforums.com/forum/mark-v-x-420g-58/

 

Welcome to the Forums.

 

Welcome to Jaguar Forums Henry,

Good to have you with us.
Enjoy the forum.

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Hello, Henry,
Welcome to the forums from ElinorB.
(';')

 

welcome to the forum - enjoy!!