Lorries with 13-speed Fuller Roadranger 'boxes

ERF-NGC-European:
why is he blipping the throttle to upshift when he should be letting the revs die to match the cogs. He’d never have got thro’ a Class 1 test in Blighty with a Fuller 'box in our day! lol :laughing: . Robert

There is some method to that madness Robert at least on the flat.Just like matching the revs when you’ve shifted into neutral as part of a clutchless/floated upshift.Or possibly even having missed a shift,leaving the choice then of either re match the engine road speed perfectly or stop and start again.IE it’s just a method of rematching the engine speed if the revs have fallen below the road speed during an upshift.

On that note listen to the soundtrack on the Bullitt car chase.( By all accounts dubbed over the scene from an actual race car and driver ).Of which I sometimes did/do a reasonable impression with everything from the TM and Fodens to the old Clydesdale to the Jag.Especially in the case of the Detroit engine which had similar characteristics to a race car engine ( or a Jag road car with an aluminium flywheel :smiley: ),regarding the almost instantaneous way that the revs drop off a cliff,when you release the accelerator.You’ve probably spent too long around ■■■■■■■ engines in that regard in which case the problem would probably be more often that of the road speed falling faster than the engine speed. :smiling_imp: :wink:

youtube.com/watch?v=no7XR7s8Z7o 1.08 - 1.54

While it’s easy to discern the split upshifts from some of the rev matched full upshifts in this vid.

youtube.com/watch?v=ZmytwZnXgjM