How much Fore/Aft play is there in a typical TRT propshaft. Just wondering how accurate I have to be in measuring up for one.

A TRT propshaft is the same length as a conventional propshaft. Usually, a sliding joint is fitted to the propshaft where it connects to the sprocket adapter to allow for any movement or inaccuracies.

Phil

Is your diff / engine solidly mounted?

If so all the movement will be due to chassis flex or end float on your output shaft / input shaft.

I would reckon on an inch - if its solidly mounted.

Others may disagree of course

Geoff

Thanks Phil, I was just looking at your site. I'm thinking of using a big spacer to make the propshaft more central since it doesn't line up too well with the R1 at the moment. I'm about to send the prop off to get modded & so I'm concerned at how accurate my prop length measurement needs to be in case I end up moving that central bearing a bit. Obviously if there is a fair bit of movement in that sliding joint then it won't be too critical.

My Westfield props (before and after RGB) have a good 60mm movement in each.

That said, a TRT doesn't mean it has any longitudinal movement (adjustment, whatever its called), so just specify what you want or take advice from Bailey Morris etc when you order.

I can't see you being 20mm+ out on what you actually need and they can easily cope with that so no worries.

Mine has about 4cm of movement in the slider to allow you a little leeway in measuring - not much!! I measured up using string the centre line of where I wanted the prop to go - then found I needed to move the engine so measurements are now defunct!! LOL.

i would measure it up in a straight line..

tell them that you want that measure ment at half the sliding capacity..

in that way it can grow and schrink..

Tks