Automatic transmission dipstick on 2.2?

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Jan 21, 2014 | 01:21 PM

#31

Laco

Senior Member

Joined: 04-22-2009

Posts: 763

From: Southern California

Quote:

Originally Posted by donbrew

The car must be level and the ATF must be at 104F and the motor must be running. Then remove the level control plug.

Why worry about the ATF level to begin with? Where could it go? Onto the ground is the only place.

Most manufacturers have realized that now. Plus with synthetic ATF being long life.

Don't know if its still the case on these transmissions, but years ago there used to be a vacuum modulator valve, on the transmissions. I have seen those go bad internally, resulting in engine vacuum sucking fluid out of the transmission, into the engine intake. No leakage on the ground with that issue, just that mysterious loss of transmission fluid. As I said, I really do not know if they are still used or not.

Jan 21, 2014 | 02:07 PM

#32

db/sb

Senior Member

Joined: 06-26-2006

Posts: 1,876

From: San Bernardino, California

As I recall, depending how severe the breach in the vacuum diaphragm in the modulator was, it wouldn't be all that 'mysterious' considering the exhaust smoke that would cause. I don't think the HHR trans is has one, however.

Mar 10, 2014 | 07:31 PM

#33

Raysrocks2

Joined: 03-04-2014

Posts: 5

From: Puerto rico

I looked for more the 10 min

Mar 17, 2014 | 09:43 AM

#34

cc732

Senior Member

Joined: 07-19-2007

Posts: 134

From: Amherstburg, On Can.

Last time I ever saw a modulator valve was on the remaining THM 350's (rear driver) we made in Windsor before we re-tooled to the THM 125 (front driver) in 1982.
THM 125's and the 4T40 & 4T45E didn't need modulators due to the different clutch pistons, check valves and valve body changes.
Modulator valves went out of style with the glass T Tops.
They are sometimes used on R 400 heavy pick-up truck diesel apps, I think.
Clare