My master cylinder is gone (beyond reasonable repair) and I cannot find a new one anywhere, will an xj40 chassis cylinder work for me or should I keep looking?

 

Not at all. The XJ40 cars have a completely different system made by Teves.

SNG Barratt have them from the OEM supplier: -
https://www.sngbarratt.com/English/#...assembly/16968

 

ebay and Amazon too. The same M.C. is used in other cars. They are plentiful.

 

awesome, I’ll do that. Thanks!

 

got mine off rock auto, had to modify the gaskets to fit the resivoir

 

I tried rock auto but they only have the xj40 master available (listed for the XJ6 so I’m glad I read carefully) I just found one on autohauzAZ.

https://www.autohausaz.com/pn/CAC001229

 

Problem is Jaguar used the XJ6 name on four model ranges, - Series 1, 2 and 3, XJ40, X300, and X350

 

yeah, trying to find model specific information has been super difficult (this forum and the Haynes manual have been my bible) I also just re wired my horn, that was something I wish on nobody.

thanks for all the help!