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4 Cylinder NA and Turbo This section is for questions pertaining to stock or modified 4 cylinders, including the performance 2.3L applications

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Old 03-20-2008, 09:42 PM   #1
sleeper_inc
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Default Replacing the A4LD Vacuum Modulator

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If your Modulator has failed (like mine) then when you take the vacuum line off transmission fluid will drip out (flow out)

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Loosen the bolt (its 10MM) and take the bracket out

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Old modulator on the right, new one of the left

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This is the thin metal pin inside the modulator... DO NOT LOOSE THIS!!!! transfer over to the new modulator

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Pictures of the only modulator

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Picture of the new modulator

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Bracket used to hold the modulator in place

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Space were the modulator goes

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New modulator in place with vacuum line hooked up

not so hard to do when the car is jacked up
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1988 Mustang LX
Ex 2.3 N/A car, built 2.3 turbo with LOTS of goodies! now I gotta find a rear end and a ps/pump XD

1989 Ranger STX 4x4
2.9L auto
274,xxx km's
tinted windows, 2 - 12" kicker comps with a 400.1X at 500watts
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Old 03-20-2008, 10:32 PM   #2
924banger
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Default RE: Replacing the A4LD Vacuum Modulator

What are the symptoms of this failing? nice pics by the way!
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Old 03-20-2008, 10:39 PM   #3
sleeper_inc
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Default RE: Replacing the A4LD Vacuum Modulator

Later shifts, transmission fluid in the lines, and a wired burning smell (also bad shifts)
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1988 Mustang LX
Ex 2.3 N/A car, built 2.3 turbo with LOTS of goodies! now I gotta find a rear end and a ps/pump XD

1989 Ranger STX 4x4
2.9L auto
274,xxx km's
tinted windows, 2 - 12" kicker comps with a 400.1X at 500watts
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Old 03-20-2008, 10:58 PM   #4
924banger
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Default RE: Replacing the A4LD Vacuum Modulator

cool, just asking for later viewers of this thread. It should be put in the tech articles.
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Old 03-20-2008, 11:07 PM   #5
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Default RE: Replacing the A4LD Vacuum Modulator

Already there

Don't have the contributor badge for nothing [8D]
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1988 Mustang LX
Ex 2.3 N/A car, built 2.3 turbo with LOTS of goodies! now I gotta find a rear end and a ps/pump XD

1989 Ranger STX 4x4
2.9L auto
274,xxx km's
tinted windows, 2 - 12" kicker comps with a 400.1X at 500watts
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Old 03-21-2008, 06:03 AM   #6
usermst9673
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Default RE: Replacing the A4LD Vacuum Modulator

how much did it cost you for the new one? And where did you buy it at?
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Old 03-21-2008, 09:40 AM   #7
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Default RE: Replacing the A4LD Vacuum Modulator

$15, and I got mine from auto parts plus. Any store should carrie it
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1988 Mustang LX
Ex 2.3 N/A car, built 2.3 turbo with LOTS of goodies! now I gotta find a rear end and a ps/pump XD

1989 Ranger STX 4x4
2.9L auto
274,xxx km's
tinted windows, 2 - 12" kicker comps with a 400.1X at 500watts
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Old 03-21-2008, 10:55 PM   #8
usermst9673
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Default RE: Replacing the A4LD Vacuum Modulator

checked mine today and it was leaking badly. So i replaced it and figured i would change the filter and fluid in the tranny also. Well come to find out my trans is out of a 90 mustang even though my mustang is a 91. Drove nearly clear across town to the parts store that had the 91 filter to find out it didnt fit F*** me. Should have double checked.

Sleeper does your new one have an adjustment screw on it?
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Old 03-22-2008, 07:43 AM   #9
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Default RE: Replacing the A4LD Vacuum Modulator

Yes it does, but thats because its the turbo one (highly recomend it since you can change your shift points with it)
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1988 Mustang LX
Ex 2.3 N/A car, built 2.3 turbo with LOTS of goodies! now I gotta find a rear end and a ps/pump XD

1989 Ranger STX 4x4
2.9L auto
274,xxx km's
tinted windows, 2 - 12" kicker comps with a 400.1X at 500watts
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Old 03-22-2008, 08:35 PM   #10
usermst9673
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Default RE: Replacing the A4LD Vacuum Modulator

good thats the one i got glad to hear i can adjust my shift points now!!!!
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1992 F-150 5.0l
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Old 03-22-2008, 08:35 PM
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1966, 1992, 90, a4ld, amount, bad, fluid, length, modulator, mustang, pin, replacing, symptoms, transmission, vacuum

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