3-4 has always been soft, in comparison to the other shifts, but it firmed right up with a little more line pressure.

A case of ATF is about $50.00 USD now!!!!!

Figured this anomoly out...

The light-throttle upshift with the 2.47:1 is taking place at the same mph where the transmission normally executes a closed-throttle downshift, so if your throttle input is light enough, the unit will shift 3-4 then immediately downshift 4-3 and then shift 3-4 again.

I think perhaps lengthening the control rod a little will raise the shift points...

It only does this after a long drive on the freeway and very light throttle...

And this speed is?

(And your tyre size is?)

Thats weird....never happened on our '83 SD that we converted to a 2.47....I had the modulator and bowden cable set pretty firm for shifts and drawn out for throttle position.

About 25 mph with the 2.47:1 axle and P215/70R14 tyres....

Shifts are firm, but I need to space them out a bit apparently...

PawoSD:

You have a different transmission....:)

Some data that might help
 

From Chapter 27-320 in German FSM

Teilgas

Goes to 3 at about 30 km/h

Goes to 4 at about 50 km/h



Shift points from German FSM


http://www.peachparts.com/shopforum/...1&d=1372282930

And my super quick estimations and conversions for you

(Aerodynamic effects and engine power / capability ignored! This is just gearing)

http://www.peachparts.com/shopforum/...1&d=1372283018

Nicely done!

If you want a copy of the spread sheet I can send you it. It is one of those things that I happen to have been playing about with recently - seeing how an OM617 in American tin will work out etc

That would be cool....

E-mail me via my profile...