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Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 09-24-2006, 11:06 AM   #1
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Can we make a vacuum leak or install a valve on the vacuum line to reduce the vacuum of trans modulator to improve shifting without change the modulator...sorry for my english sir
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Old 09-24-2006, 11:40 AM   #2
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Welcome to the club! I actually work for a Canadian company, not too bad to work for

Our cars should already have a restrictor/check valve installed near the modulator. Also, you can order a tunable modulator as well.
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Old 09-24-2006, 12:00 PM   #3
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Buy the adjustable modulator. A handful of us run them. They're much more predictible and responsive. And they're not expensive.
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Old 09-24-2006, 12:20 PM   #4
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Can I buy this ajustable modulator at autoparts like uap napa??
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Old 09-24-2006, 12:54 PM   #5
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Old 09-24-2006, 10:28 PM   #6
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I miss my Vacuum modulated Trany...very good mod
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Old 09-25-2006, 07:17 PM   #7
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YOU remove the vacuum line from modulator??????
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Old 09-25-2006, 07:23 PM   #8
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Fran, he has a newer Bville now. In 1997, the 4T65E trans replaced the 4T60E. The 65 doesn't use a vacuum modulator. It'* electrically controlled.
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Old 09-25-2006, 07:28 PM   #9
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OK I can' t unplug the vacuum line.....because I can broke my trans....?sorry for my bad english,,,
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Old 09-25-2006, 07:39 PM   #10
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You NEED a modulator. You cannot delete it or disconnect it.

Either stay with the OEM modulator or buy an adjustable modulator.
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