Speedo tooth gear alignment

[BrettJ]

Does anyone have a photo of their half shaft with the Speedo ring which they can share? I have already moved mine back in position once and clearly it wasn't enough as after 2 miles it shifted again. So I'm would like to know where about it should be on the axle in relation to the CV boot or Speedo sensor. (S3 BMW diff)

Any advise on how prevent this happening again would be appreciated too.

[Jonathan Kay]

I suggest starting with the Speedometers Guide and this thread.

How are you fixing the ring, and how old is the car?

Jonathan

[BrettJ]

Thank you, I didn't fix the ring, I just moved back into position. The car is 2019 model but only has done +/- 450 miles

[John Vine]

There are some photos on the CC Parts site which may help.  The key is to line it up squarely with the sensor. There's a pic in the Guide mentioned in #2, but it probably shows the older version of the sensor.  As for fixing it in place, you could try Araldite, but check first that both shaft and sensor are rust-free.

ETA:  Also check that the ring itself is not cracked.

JV

[nonturbo]

Had the same thing on my 420 and now my 620.

I kept having to remove the wheel and pop it back into alignment.

I have it booked into Caterham for replacement shaft under warranty and I hear there was a dodgy batch!

Caterham do not recommend welding it or bonding it.

It will eventually sheer the nylon locking nut and maybe the ruin the sensor.

It is a pain when you keep losing the odemeter every time the wheels spin too fast and you have to use a gps app as your speedo.