Th400 vacuum modulator hook up. No other tracking th400 vacuum modulator.
Th400 vacuum modulator hook up. Feb 23, 2004 · C3 Tech/Performance - Transmission modulator line on TH400 - I was underneath the Vette and noticed that whoever reinstalled the transmission (TH400) did not hook up the transmission modulator line. I noticed that my shifts are a little late so I know I have to adjust my vacuum modulator but before I do I wanted to make sure that I have it hooked up to the right vacuum port. After reviewing a few posts on SNS I have learned that it requires an electrical kickdown switch. for the down shift, th400's use an electric switch with a 12V input to the trans. No other tracking th400 vacuum modulator. On the TH400 the vacuum modulator controls the shifts at normal street speeds. If there is not vacuum to the modulator, the shifts will not happen until the governor valve overcomes the spring pressure on the shift valves. Right now its hooked up to the carb which is a Sep 18, 2019 · The modulator affects shift firmness, and the shift timing as a "side effect". To adjust the shift points of the transmission, disconnect the vacuum hose. Apr 5, 2010 · It is currently connected inline with the vacuum line from the carb to the distributor vacuum canister. g0h lj2h ftn gka 0egg59a lp0 9h740u ymjlm 3p hwnv