Does anyone know the proper method for bleeding the brakes on an 87 4000CS Quattro? Also, myu center diff won't lock. The actuator works, and there is vacumme there, but not enough to operate the actuator. Does any one know what could cause this? IF anyone knows, please email me, or post to the digest. Thank you, Austin oliveiro@snowcrest.net Austin Walker-Oliveiro oliveiro@snowcrest.net Redding, CA