Id just like to say how great a board this is ive read most all of the posts absorbing as much as possible...on to the problem
When shifting, the car hesitates when shifting from 2nd to 3rd. The RPM's vascillate between 28-32 very quickly, causing the care to spasm forward and back as it drives. The car only does this on hard accleration..ie if i drive it easy it changes fine..i dont get any "spasming." But under hard acceleration is when i get these problems...any suggs ? vacuum modulator ? hoses ? rebuild ? how much would it cost to have corrected if it is the modulator which from all the posts ive read seems to be the most probable cause.
thx for ur help
1985 300 D