Posted a ? about/maybe a blocked oxy/cat on my 617 but I'm thinking it might be the turbo/wastegate.

What i use to feel, 3 weeks ago:1985 300SD 617 ca model, new oil, new trans thats great, perfect shifting and holds and pulls at the 'big hill' past 3000 rpm when the 4/3 down shift happens. Oil pressure guage(dummy) reads 3 and right at 2 at idle.

What I feel now: Loss of power and weird surging/pulsing going up hill. Only problem is going up a steep hill and third kicks in and rpm/power drops and keeps dropping till i reach the top. Third gear is lagging on highway 4 to 3 down shift power too. RPM 3000- 4100 till i let 4th kick in. No other problems at any other speed. Totally different than before.

Now, it could be the waste gate or boost?

thanks for any info you can give me or a general direction.

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Rick & Michele in California
1985 300SD Turbo Deisel
300,000+ miles

1963 Mercury Meteor Stationwagon
1959 Montgomery Ward Silver Pigeon Scooter & matching bicycle
1974 IH Scout 4x4