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Old 10-24-2011, 10:22 AM
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turbo 350 lockup

i need to loose lock up...is screwin with my 3rd (draggin) is two prong just want to run a hot wire to it as i dont need the crap

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Old 10-24-2011, 10:57 AM
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Trick Question?

Sorry HB, but I can't quite tell from your post what problem you are trying to solve.

For a turbo 350, there is no lock-up. There is a kick-down, implemented using a linkage from the carb to the trans. This should not affect shifting, except when you are in high gear and stab the throttle, this will enable the trans to downshift to 2nd gear for passing. This is all mechanical, no wiring involved.

For a turbo 400, the kick-down uses a switch mounted with the accelerator linkage at the carb that is wired to the transmission. When you stab the throttle, the switch is activated and will enable the trans to downshift to 2nd gear for passing.

If your kick-down isn't working properly, your trans won't downshift for passing and your engine will bog down. If this is the case you need to fix the kick-down (mechanical or electrical). Eliminating it won't help.

If you meant that your trans is shifting early, causing your engine to bog down, that is a different problem. Usually an adjustment to the vacuum modulator will help this. It sets the shift speeds for you transmission. I would recommend getting some experienced assistance with making this adjustment, it is easy to get it wrong and you could damage your transmission by driving it with the modulator adjusted too far in either direction.
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Old 10-24-2011, 02:38 PM
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If you have a th350c that has the locking tc if you dont want it to lock up unhook the wires from the trans. and it wont lock. The rpm will be a couple hun. more than locked but no biggie. It wont heat it up to much or any thing like that.
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Old 10-24-2011, 05:46 PM
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oops - gf is right. I forgot about the lockup torque converter used from 80-84. I've never even seen one.

What is the control that enables the lockup?
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Old 10-24-2011, 06:43 PM
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Quote:
Originally Posted by starnest
oops - gf is right. I forgot about the lockup torque converter used from 80-84. I've never even seen one.

What is the control that enables the lockup?
On my pre-CCC '80 Malibu, it's triggered by a vacuum switch on the driver side fender well along w/the valve body to lock up at about 37 MPH and release below 35 MPH or when it's shifted out of "D" or when the brake is applied. I believe the '81-up had some interface w/the computer.
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