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Old 07-17-2007, 05:06 PM
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1993 Explorer auto trans problems

I have a 93 ford explorer 4x4 with a 4.0 liter v6 and a A4LD automatic transmission. I'm having a having a problem with my transmission upshifting into 3rd gear, and i'm wondering if the vacuum modulator could be the problem with the transmission not upshifting, any help with this problem or answers to my question would help grately. thanks.

extra info: the fluid looks fine and it doesn't smell burn't, but i haven't checked the transmission pan or the filter yet.

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Old 07-18-2007, 10:37 PM
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I'm going to move this thread to the reaends and tranny section, should get a reply there. Dan
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Old 07-19-2007, 10:49 AM
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explorer blues

Is the 1-2 shift on time. Is the problem your having with 3rd gear a no upshift, a late upshift, slipping when it goes to 3rd.

Late upshifts, across the board, would indicate a vacuum situation.

Late upshifts- check vacuum at the trans.[ modulator] 18-20 inchs of vacuum. When you pull the modulator hose off, to check the vacuum, take note, there should be NO fluid in the vacuum hose.

If there is, your modulator is BAD!

Check these things first, do not go yanking the pan off yet. No questions will be answered by doing this. Unless the pan is full of stuff.
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