Ok so heres the deal, I have verified all the pressures and adjustments are correct on my transmission. When in drive as soon as I give it throttle it shifts up rapid fire into fourth, so taking off I have to manually shift it into low and shift up to third and fourth as I gather speed. Also my reverse lock-out will not retract until the car is turned off. I have performed a service on the trans and put in a spring kit from monster trans and no change. Has anybody ran into this and fixed it? Thanks in advance.

You say that the trans will not shift "right".
Will it shift left?
If you will identify the Make and Model, perhaps we may be able to assist you. Some shift right, and some shift left.

Apologies, 1983 300d, 722.3, om617

" I have verified all the pressures and adjustments are correct on my transmission."

Must just be the way your MB works.

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1985 300D 198K sold
1982 300D 202K
1989 300E 125K
1992 940T

"If you dont have time to do it safely, you dont have time to do it"

"The democracy will cease to exist when you take away from those who are willing to work and give to those who would not."

Check your pressure control cable aka Bowden cable. I had this same problem once and found the linkage for the cable on top of the valve cover to be loose. It wasn't pulling the cable at all and it caused "stacked shifts".

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Current fleet
2006 E320 CDI
1992 300D - 5speed manual swapped

former members
1984 300D "Blues Mobile"

1978 300CD "El Toro"

my 93 300D shifted hard/incorrectly because of a vacuum leak. adjusting the bowden cable helped alot as well

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1993 MB 300D 245K died.

On your car that is most commonly an indicator of a Bowden cable problem.

Most of the time that problem is a broken adjuster. If you search there are posts on how people have rigged fixes until the cable could be replaced.

Since you say that you already checked everything else, I assume you have checked to ensure the vacuum control system is functioning properly, that is the vacuum control valve is bleeding off pressure at the shift points. If that isn't working, that can also cause the symptom you describe.

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Mac
2002 e320 4matic estate│1985 300d│1980 300td
Previous: 1979 & 1982 & 1983 300sd │ 1982 240d

“Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22

Bowden cable or you overlooked something. Rapid shift is bowden. Harsh shift is lack of vacuum usually from vac leak. Flare is modulator pressure. All can be inter related.

There are 2 bowden cables for my 722.3 in my 84SD. The transmission ends differ. Complete trans number will find the correct part. Order the o-ring. It is a strange size and not available here locally or included in either metric or ASE Harbor Freight kit.

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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.

Hard upshift is failure of vacuum to bleed off. Should be no vacuum at WOT and no vacuum leads to good upshift. Uses vac for downshift only.