W123 vacuum principals 1985 300d turbo diesel

[300Drestoration]

With the understanding that the vacuum pump source gets split off into two systems.. one being to the transmission shifting and the other to "other consumers"... will a leak in one system affect the source strength of vacuum going to other system? Or is there a buffer in place to prevent the two systems from affecting each other?

I have shifting issues, but also issues with very slow door locks. Planning to do a test of the pump first but wondering about this too.