HI,

OK

1) mighty vac to tranny modulator,,, holds vacuum (15 inches)

2) at idle vacuum going to tranny modulator (Black line) shows 8 inches, but it jumps around.

3) at about 1/3 throttle vacuum goes UP to 10 inches (from 8) and very steady

4) at WOT vacuum drops to 5 inches but no lower (and very steady).

5) EGR disconnected

6) unrelated (maybe) but still a question,,, the VCV (Vacuum control valve (inserted for searches)) has 2 vacuum lines hooked up to it, one on top, one on side. I took VCV apart and the vacuum on the side is vented??? Why in the world would MB vent a vacuum line through teh VCV???

This is the first 300SD that I think I will be able to get it to shift correctly, kinda shifts hard (at all throttel positions)right now so I'm guessing someone tinkered with the vacuum modulator to keep it from flaring on heavy acceleration, living with the hard shift on light accel.

Thanks

__________________
Closing the store
Benzbonz.biz on your smart phone or tablet.

On the OM617, one is the vent on the VCV, the other needs a vacuum source. The vent should not be connected to the vacuum source. Higher vacuum means softer shift, less vacuum means harder shift.

Even though the EGR is disconnected, did you disable the 3-2 valves on top of the valve cover?

Also, is this a Cali type car or Federal?

Read the extra long thread started by Samuel Ross about "Adjusting the transmission"

__________________
RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K

90 Dodge D250 5.9 Cummins/5 speed. 400K

AS far as the 3-2 switch,,, yes all that's been disconnected, sorry should have clairfied that in the thread.

will look up samuel ross

__________________
Closing the store
Benzbonz.biz on your smart phone or tablet.

I think My VCV valve isn't bleeding like it should. When I apply vacuum to teh top connection and move the lever to bleed, it drops to a point (5 inches) from the 15 inches I pumped it up to.

Anyone know how to clean these buggers?

__________________
Closing the store
Benzbonz.biz on your smart phone or tablet.