Hello all -- I've been trying to rid my car of a rather nasty 2-3 shift flare (not present under very light or very heavy throttle) in my 82 300D turbo. 3-4 will also flare on occasion, but not frequently.

I've been following this guide, posted elsewhere on the forum: http://transmission.articles.mbz.org/adjust/

I've found that vacuum at the brake booster line is 21-22 in., but that it drops to around 18 in. when attached to the regulator valve on the injection pump. If I disconnect this valve (and plug the feed line) I've got the same shifting conditions but with 22 in. of vacuum. The valve is not adjusted properly yet; there is at least 1mm gap between the stop pin and the lever at full throttle. Also, the switchover valve levers are worn out.

Is the regulator valve shot? Or can I adjust it back within spec? And does the bad switchover valve (on the camshaft/valve cover) affect this?

I'd like to at least start with full vacuum at idle.

Thanks for any input.