Reply to "Breather tube for ZF"

Al is correct on the absolute necessity of the max available clutch disengagement. To check, first have someone mat the clutch pedal while you stick a feeler gauge thru the hole in the bellhousing. If you can't get a 0.040" gauge in there, you have clutch drag. .040" total means only 0.020" on each side of the disc, which is ragged-edge OK. Could be from a beginning-to-fail clutch master or slave, wear in the mechanical linkage under the dash or the slave not properly adjusted. The ZF is not like domestic trannys; the synchro rings are mild steel, not bronze. This means they wear much longer. But when they finally do wear out, the mating gear cone will also be also irreparably worn, and a single ZF gear runs around $1200 not installed... Adjust those clutches and do not speed-shift. Or accumulate a BIG bucket of money to send off with the trans.