Transmission Shift Modulator
Transmission Shift Modulator
I have a 84 300D that I drive somewhat frequently, and ever since I've bought it I've been having an issue where the transmission will shift somewhat harshly into gears. Not really noticing a huge mercedes diesel presence in Louisville,KY leads me to believe finding someone to help me figure out exactly what is going on or confirm my suspicions is going to be a bit challenging. However, using my vacuum pump (sears all-metal mityvac) I isolated the transmission modulator as a source to my problems. It's not pulling any vacuum. I get 22 from the pump, 15 from the VCV on the IP, and 0 from the modulator. I bought a new modulator, but either I need to drop the transmission or I need really really tiny hands to get everything out.
I saw a picture that looked like there was plenty of space between the shift modulator and the rest of the body of the car, but mine has about 1/2 inch of clearance between the modulator clamp bolts and the body of the car.
Any tricks? The only thing I have left is shock/motor/transmission mount replacement, transmission fluid/filter change and rear suspension (maybe). Trying to do what I can to keep this car on the road for a really long time.
Long time listener, first time poster...
I have a 84 300D that I drive somewhat frequently, and ever since I've bought it I've been having an issue where the transmission will shift somewhat harshly into gears. Not really noticing a huge mercedes diesel presence in Louisville,KY leads me to believe finding someone to help me figure out exactly what is going on or confirm my suspicions is going to be a bit challenging. However, using my vacuum pump (sears all-metal mityvac) I isolated the transmission modulator as a source to my problems. It's not pulling any vacuum. I get 22 from the pump, 15 from the VCV on the IP, and 0 from the modulator. I bought a new modulator, but either I need to drop the transmission or I need really really tiny hands to get everything out.
I saw a picture that looked like there was plenty of space between the shift modulator and the rest of the body of the car, but mine has about 1/2 inch of clearance between the modulator clamp bolts and the body of the car.
Any tricks? The only thing I have left is shock/motor/transmission mount replacement, transmission fluid/filter change and rear suspension (maybe). Trying to do what I can to keep this car on the road for a really long time.
Its important to remember to remove the clips on the fan shroud up front b/c the whole engine will tilt and put pressure on it.
if it don’t blow black...take it back.
1982 300TDT 4 Speed 196K Standard Beige “VEGEWGN”. 300GD FW. Walbro FRC-8 Fuel Pump. ZadaTech LCD Boost, EGT, & Fuel Pressure gauge. Non-EGR Exhaust and Intake Manifold. 3/2 Valves gone. Soon to have Elsbett WVO conversion
1981 300D 314K Midnight Blue “The Blue Car”, Lovecrap system, owned 25 years+
1985 300TD White 198K “Betty White” Pure beauty
The VEGEWGN
Really just removing the trans mount should give you enough wiggle room to get to it. With the mount removed, the trans will drop a full 2” in the rear.
Its important to remember to remove the clips on the fan shroud up front b/c the whole engine will tilt and put pressure on it.
if it don’t blow black...take it back.
1982 300TDT 4 Speed 196K Standard Beige “VEGEWGN”. 300GD FW. Walbro FRC-8 Fuel Pump. ZadaTech LCD Boost, EGT, & Fuel Pressure gauge. Non-EGR Exhaust and Intake Manifold. 3/2 Valves gone. Soon to have Elsbett WVO conversion
1981 300D 314K Midnight Blue “The Blue Car”, Lovecrap system, owned 25 years+
1985 300TD White 198K “Betty White” Pure beauty
The VEGEWGN
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