Date registered: Jul 2009
Vehicle: '80 300SD (W116), '81 300D, '89 560SL, '01 E320
Location: Phoenix, Arizona
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
My 300D with 722.1 with only a vacuum line (no rod or cable) used to flare a lot from 2-3. I tested all the normal thigns -- the vacuum connections, the filter was changed, fluid checked, etc. We brought it to a place in town that specializes in transmissions on german cars (it's called German Transmission Company) and he kept it for a few days, put it up and down the lift, adjusted the modulator, and told us he got it as good as he could without rebuilding anything, and charged us $60 (nice deal). It is much better, but he had to set it in such a way that when the car is cold, it revs very high before shifting. Once it warms up, it shifts beautifully with only a bit of flare/slip from 2-3. Much better than before.
I'm trying to figure out if there's a way to get it even better. It revs really high -- all the way to 3500 or 4000 or so -- before shifting into 2nd and from 2nd to 3rd when it's cold. Also, the shift from 1-2 is very hard, to the point of getting a slight tire chirp. I am sure this is not good for it.
I was thinking of using some vacuum tricks to get the shift to be smoother when it's cold -- maybe I could use the EGR temp valve to stop the vacuum leak while it's cold to provide more vacuum to the transmission till it warms up?
Are there any other adjustments I can make?