Yes that is the issue, the fluid stays inside so nothing to see. Have a look in the reservoir with a good light, black stuff at the bottom will be tiny bits of the seals.

With the pipe off servo and engine on tick over put thumb over end of pipe, If the pipe holds itself on vac is good. Check the valve the pipe fits to on servo is working. With the master as it is old you may have issues with seals inside...

Wouldnt issues with the seals inside the master show as fluid loss though? Or not because it's still staying within it. I'll check the vacuum again today

Any way I can test it? With the vacuum hose off the servo I'm still getting a good vacuum (as far as I can tell)

Brake vacuum pump is my thoughts.

I replaced the servo on my motor before the rebuild and the brakes were brilliant, much much better than they'd ever been. During the rebuild I replaced all of the brake lines and for a bit the brakes were still great but over the last few weeks...

Apart from wear and tear in joints I found it was incorrect preload or a duff axle shock that will cause your symptoms.

Both front shocks are new so I'll go with preloads

Another one while I'm here. For a wee while I've had a fair rattle through the steering column if I go over a pothole or rut in the road. When I had it previously I changed the steering shock but didnt seem to make any difference and now I've...

Another vote for Corteco seals.

Breather pipe is brand new. My last one did have damage so I put the leak down to that hence why I changed the breather and the seal

The flange was nice and tight going into the seal so I don't think it's that and I can't see the pressure being high enough to blow it after 1 drive. I'll check the banjo bolt to rule that out

The one I got looked pretty good quality, thankfully not britpart or the like. If it started leaking from the old one and now this new one then I'm inclined to believe there's something else going on but I'll double check the banjo bolt. I use a...

Nope but it's not the original bolt that's in, it's a newer one I fitted. I'll take it out and check it though. My hub seals are still good, it's just the pinion seal

Didn't see any grooves and marks worn into the flange, it's still in pretty good condition and isn't that old

Anyone got any other ideas. My rear diff had started leaking (which I've never had an issue with). I thought that the cover plate gasket and pinion oil seal had blown due to a damaged breather pipe. Replaced both today and also replaced the whole...