So the older 123 transmissions aren't vac operated and thus have a mechanical modulator. It can be adjusted, but how many turns is too many? I've adjusted it two full turns but the shifts are still softer than I would like. Can I keep going?

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You have to adjust the length of the control rod where it attaches to the bellcrank on the passenger side of the engine block, under the exhaust manifold. If I remember correctly, lenghtening the rod makes the shifts later and firmer, shortening makes them sooner and softer. Just adjust until you get it the way you want.

If you have mechanic's gloves, you might want to wear them to protect your hands from the hot exhaust.

will that help with flare? I have flare on the 77 in all gears, after filter and fluid it has improved, but is still there. Really bad in 2-3

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83 300SD Dark Silver Dark brown inside

It helped my flaring some. It didn't go away, but it was pretty bad before. If I accelerate at a moderate speed the shifting is pretty nice. But if I have my foot in it at all it will flare on the 3-4 shift pretty bad. The length of the shift rod off the throttle linkages will also change the shift timing and quality.

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I'll definitely second the glove suggestion! I remember this adjustment being pretty frustrating only because I kept burning myself but didn't want to stop until I had the shift points exactly where I wanted them. I suppose it was worth it in the end.

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84 300D 255K "Mr B" ("Mr Becker")
79 300D 265K "Mrs B"
85 300TD 175K "Mali" (Sold)
74 Ford F-100 74K "Bonnie" (Sold)
67 Jeepster Commando (Sold)