A4LD question
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Junior User
Joined: Apr 2011
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I meant vacuum modulator. From the way they've been described, I would imagine that they might cause the transmission to shift high and hard, and cause a vacuum leak and make the engine do weird things, too.
Lead Driver
Joined: Sep 2003
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From: SoCal
I seem to remember one of my cars with a non-functioning vacuum modulator would shift way too early, so the engine would strain, and the transmission was probably slipping a lot. On another car, it would not shift out of first gear. On yet another car, the shifts were occurring, but very harsh. So I've seen all sorts of responses.
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Tuned
Joined: Jan 2008
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From: Longmont, CO
The modulator will not work in any way and you will need to buy a new pin from the dealer. I lost that pin inside an Explorer of mine years ago......
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Junior User
Joined: Apr 2011
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Yeah...I replaced the modulator and lost the pin, but Fordor, the god of Aerostars blessed me, and I found it on the floor...in the oil dry...almost swept up. The funny pary is that it shifted into all four gears, but slipped like it went into noodle on the 2-3 shift, and then caught.
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Joined: Sep 2006
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I recently re/re'd the vacuum modulator, gave the trany a gentle flush, new filter and very carefully adjusted the fluid level to just right. All shifts became smoother and more efficient. The trany wasn't operating badly, but it became noticeably better with the servicing.
Cheers, Mike
'89 EB Ext. Aero, 3.0 auto.
Cheers, Mike
'89 EB Ext. Aero, 3.0 auto.
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