31. Transmission vacuum modulator, V12 cars TH400 transmission
Jaguar Parts Technical Information part 2
The vacuum modulator sits on the side of the transmission, and connects
to a vacuum line that runs up to the engine. The vacuum signal tells the
transmission about engine load, so the transmission can shift at the appropriate
time. There is a rubber diaphram inside the modulator, and over time the
diaphram gets weak and eventually can break. Once broken, the engine will
suck transmission fluid into the intake and you'll get clouds of white
smoke out through the exhaust, particularly at high speeds. Transmissions
with this problem will not shift correctly. Fortunately, they are easy
to replace!
See our Jaguar Parts Store to order parts.
Other Jaguar Technical Information Pages:
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TechBits Page 2 |
TechBits Page 3
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