Okay about 8 months ago my 78 300SD lost reverse. I now pull through everywhere I go.
Drive, S,L all work fine with no indication whatsoever that they are thinking of taking vacation. I checked fluid with the engine at running temp and it checked out fine. Pinky red, not dark. I do have a slightly more definite shift into second, not as smooth as it once was. Second to third is smooth.
Thoughts? Advice?
I took it to a transmission place (mom-pop, not big name) and they gave me numbers from $2600 to $4500 depending on replacement, rebuild etc.
I'm in the Denver area if anyone here knows of a TRUSTWORTHY place to take my girl.

Ginny in Littleton
78 300SD (mine)
79 300SD (beater boy, his)

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Ginny in Denver-ish
78 300SD, 265K (mine)