Speedo Sensor/Diff - Mystery Widget!

[Boatbuoy]

Can anyone help me with this? I'm putting the car back together and I'm a bit confused about a little 'L' shaped metal item. I'm almost certain that I removed it from between the diff rear plate and the upper mount of the speedo sensor bracket.

The bracket is bent, but I'm not sure it's meant to be. It also has a 90 degree lip off to one side at the end. I was thinking it was some kind of dirt guard for the spoked/toothed wheel that the sensor reads. But I can't see how it's meant to do that job in any orientation, bent or otherwise!

By all means speculate, but if you are guessing please state so. Likewise, if you know or have the correct factual answer I'd appreciate you letting me know.

Cheers,
Olly

Over to you lot.

[Superjuiced]

I have just put mine back in (a job I wish never to tackle again!) following a refurbish and this metal plate was never on mine.

[Hawkeye1922]

It's meant to be bent over and lock the seal plate, preventing it from turning. I'll dig out some pictures of mine. looks like you might have put it back in wrong way round as well.

[Boatbuoy]

There's another metal bracket with a bent forked end that locks the bearing pre-load wheel in the diff. That can be seen in the bottom photo located between the speedo sensor bracket bolts with it's slotted hole visible. I'm 100% sure that is fitted correctly. This 'L' bracket is completely separate.

[Hawkeye1922]

Boatbuoy said:

There's another metal bracket with a bent forked end that locks the bearing pre-load wheel in the diff. That can be seen in the bottom photo located between the speedo sensor bracket bolts with it's slotted hole visible. I'm 100% sure that is fitted correctly. This 'L' bracket is completely separate.

you're right - my mistake

[ukkid35]

The advice from Joolz is to fit the Speed Sensor on the Passenger side, not Drivers side. All later TVRs have the sensor on the passenger side where there is likely to be less run-out.

[greenracing]

Mystery solved, it is the bracket for holding the Speedo sensor wiring out of the way. You just need to undo the sensor bracket to make sure the metal tab is between the bolt head and sensor bracket.

[greenracing]

Mystery solved, it is the bracket for holding the Speedo sensor wiring out of the way. You just need to undo the sensor bracket to make sure the metal tab is between the bolt head and sensor bracket.

[N1CERB]

Before remove my speedo bracket to move it over to the other side can I ask if the bolts hold anything else in place? Just dont want anything falling off or out if I remove both the bolts.

Cheers
Dave

[Boatbuoy]

The 2 bolts that hold the speedo sensor bracket on are part of a larger group that fix the perimeter of the back cover plate to the diff. Unless you undo all of the diff back plate bolts nothing else will fall off, and depending if or how much sealant was used between the cover plate and the diff casting you shouldn't get a leak.

[greenracing]

Out of curiosity, why would the passenger side of the diff have less run out ?

[ukkid35]

Boatbuoy said:

you shouldn't get a leak.

But you probably will get a leak if you leave the bracket/bolts off overnight, as I found out.

The diff is not mechanically symmetrical, so the forces are different side to side, hence the run-out difference, which presumably gets worse with age.

[N1CERB]

cheers, will be a 10 minute job to swap bracket so all good!