Thread: Setting Transmission vacuum & modulator
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Old 01-30-2009, 12:53 AM
Brian Carlton Brian Carlton is offline
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Join Date: May 2002
Location: Blue Point, NY
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Quote:
Originally Posted by BathCity View Post
1983 300CD Turbo, 199,400 miles.
I have been reading the threads on the flaring/shifting issues with the transmission here and elsewhere and started the check out of mine, this is where I am at.

1-adjusted linkage to VCV at IP to have the proper clearance at WOT
2 -Removed lines to 3-2 valve and tees, replaced tees with straight hose
3-at double tee from main line vacuum to brake booster = 20 in vacuum
4-at line to trans modulator = 10in vacuum
5-VCV vacuum starts at 10 in and drops to zero at WOT
6-Cleaned bajo bolt at intake manifold, found crud in the bolt, but little, if any, in the fitting. Cleaned out bolt.


I believe I have to adjust the VCV up to get to 15 at idle, does this sound right?

Everything noted above in points 1-6 is correct. You do not want to increase vacuum to 15 at idle........that will increase the flare.

The recommendation to increase the modulator pressure by turning the T handle one turn clockwise is correct.

Please report back with results.
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