Auto Tran fluid loss (no leaks)

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mlabarge

New Member

Dec 31, 2003

2

0

0

Valley Center, KS

Dec 31, 2003

#1

• Dec 31, 2003

• #1

My son's 93 LX 2.3 is using up auto trans fluid, however there are no visible leaks. I have noticed fluid residue around the vacuum block where the transmission vacuum line connects. Upon removing this line and other lines connected to this block, I noticed alot of trans fluid in these lines. What would cause the engine to suck fluid from the transmission into the vacuum lines? We loose about a 1-2 quarts a month. Car otherwise runs and shifts fine. Has anyone ever experienced this?

Thanks for your help.

 

M

MustangPatty

Founding Member

Jun 5, 2002

292

0

0

Sallisaw OK

Dec 31, 2003

#2

• Dec 31, 2003

• #2

Sounds to me like the Vacume block on the trans went bad, I'd re-place that, I dont think its too bad of a job, or too expencive...

 

bhuff30

Founding Member

Dec 11, 2001

6,037

35

129

Olathe KS

Dec 31, 2003

#3

• Dec 31, 2003

• #3

That is the modulator valve leaking fluid out. It isn't to hard, and the modulator valve is fairly cheap. I am surprised that it still shifts at the correct points though. Ussually, they make it shift way late or not at all.

 

K

ka0tyk

Founding Member

Oct 10, 2001

1,610

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0

Los Angeles, CA

Dec 31, 2003

#4

• Dec 31, 2003

• #4

you remove the vacuum modulator valve with one bolt, pull it out, and make SURE you have the little pin inside... put the pin on the new one, and tighten the bolt. you might want to run a little carb cleaner into the motor to clean out all the fluid that you sucked up into the motor which is now coating your intake manifold... I dunno if the 93 has a "air intake charge sensor" but if thats covered with gunk its going to make the computer compensate...

 

M

mlabarge

New Member

Dec 31, 2003

2

0

0

Valley Center, KS

Jan 1, 2004

#5

• Jan 1, 2004

• #5

Thanks for info. I will check the modulator valve and will post an update later if this was the problem.