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Lockup issue

Old 03-10-2007, 01:40 PM
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Cool Lockup issue

Been having a small issue with my converter not locking up on the highway mostly.

98 4l60e w/cooler 2.73 gears converter is a daaco 3200stall 2.0str thats about 3 years old.

When im crusing at highway speed the converter is not locking up and killing my mpg. When i start to brake like when going down a grade i can feel it lock , then as soon as im off the brake it un-locks again? Even tapping the brake will cause it to lock up. Checked my fluid level and its fine.

Anyone have any idea what may be causing this? Is it just a pcm issue that may be resolved by tuning? It had been working fine last fall before i stored it this winter, when i took it out of storage a few weeks ago, i noticed this issue. Put about 500 miles on it so far and still having this problem. I fear that the converter might be dying

Thanks in advance guys!
Old 03-10-2007, 01:45 PM
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Is the tune stock? That behavior is the exact opposite of what is supposed to happen. It's supposed to unlock when the brakes are used.
Old 03-10-2007, 01:54 PM
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Yep, stock tune.
Old 03-10-2007, 04:06 PM
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Your problem is the dacco converter. Everything they manufacture is junk. They about put me out of business.
Old 03-10-2007, 06:35 PM
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Yea im beginning to think thats the weak link...


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