W108 250SE Tranny does't shift

It doesnt up shift at all from 2nd gear even if i put it at 3 or 4.
The rear wheels are straight. I think the springs or shocks are already worn. Do you have measurements from ground to bumper?

I presume your measurement is in inches. So the rear should sit higher than the front.

Hmmm probably the shocks are worn. Looked underneath i couldn't see any spring shims like the one found on 123/124/126.

That was a very big help.

Thanks Brian.

Shifter bushings are new. Going to adjust the rods next week. Hope this solves it. And oh, when I re carpeted we forgot to put a hole where the kickdown switch was. Grabbed a blade and made that hole.

My rear suspension isn't pneumatic. Just a regular shock and spring combination.

Rear height is at 16" and front at 18". Something's wrong???

Sorry for the very much delayed reply. It was until last week when I had time to play with my car. Saw that mine has the modulator. So I went on to adjust it. Viola the car now shifts better. Though it needs to get to a high rpm before it shifts but its not harsh anymore. I also replaced bushings that hold the differential. Two seems to be like 2 donuts fused together and two more that looks like a hat with a hole in the middle.

Thanks for all your inputs.

Now I need to find out the timing for the distributor. My spark plugs keep getting black.