Revs rise out of sync w/ road spd: clutch, diff, driveshaft?

[S Works]

First noticed this a while ago but it was intermittent, today driving the car it's apparent in all gears, especially after it's warmed up.

Car moves off OK and can be driven, but under load (particularly evident in 3rd & 4th gear) revs rise but road speed doesn't increase at the same rate.

Any thoughts before I decide whether to hand it over to Mark @ Freelance.

[Eighteeteewhy]

I'm going with clutch.

[S Works]

Eighteeteewhy said:

I'm going with clutch.

That's where I started, but I fear diff. In 1st and handbrake on you can get it to pull hard against the brake & stall.

[Richyvrlimited]

S Works said:

That's where I started, but I fear diff. In 1st and handbrake on you can get it to pull hard against the brake & stall.

Won't be the diff, they don't slip, if the diff had gone it would be very noisy or you just wouldn't move

It's your clutch, if you put it in 5th with the handbrake on then dump the clutch the car should die instantly, you want a high road speed to engine difference to stress the clutch, 1st won't do that. 3/4th when driving is also higher load on the clutch

[magpie215]

Clutch

[S Works]

Righty-ho. Thanks chaps. That's a relief, and a lot cheaper than a diff! Will give to my local garage to check out then as it's a bit of a hassle to get to Freelance at the mo.

[J.P.W.]

Clutch.

Or maybe tyres. How much power have ya got?

[S Works]

J.P.W. said:

Or maybe tyres. How much power have ya got?

Not enough. It's never enough, is it?