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For the smartest 4l60 guy here, solve problem.

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Old Jan 5, 2016 | 05:25 PM
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Default For the smartest 4l60 guy here, solve problem.

4l60e in my 2000 rcsb with a whipple 😜. Come up to a stop sign, it turns green, u take off and it revs up about 200 rpm and then just engages. It does it in OD,D, and 2 but not in low or 1st manually. Line pressure is 65+. So what ya think a guy should look at first?
Yes fluid is good.
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Old Jan 6, 2016 | 12:01 AM
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Is this a riddle? Stop signs don't change colors....
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Old Jan 6, 2016 | 08:10 AM
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Lights... My bad.
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Old Jan 6, 2016 | 09:49 AM
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In could be that the low roller clutch is not holding. When putting the trans in low the low/reverse clutches are applied, overriding the low roller clutch.

What is a rcsb?
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Old Jan 6, 2016 | 10:37 AM
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Regular cab short box. Well that suxs.. That's internals.
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Old Jan 6, 2016 | 11:01 AM
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If the issue stops in manual low the only thing that I can think of that changes when in manual low is that the low/reverse clutches come on and override the roller clutch. The low roller clutch is a mechanical clutch that looks something like a roller bearing but will only turn in one direction. Yes it is an internal part.
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Old Jan 6, 2016 | 11:22 AM
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This sounds like a high stall speed torque converter to
me. What's the problem? That you don't (think you)
have one?
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Old Jan 6, 2016 | 01:17 PM
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Originally Posted by jimmyblue
This sounds like a high stall speed torque converter to me. What's the problem? That you don't (think you) have one?
I assume the OP is stating that this problem just started happening. And that "just engages" means its suddenly grabs and not a gradual process as with a high stall converter.

OP: This is why a more detailed description is needed for us to reach the most likely diagnosis.
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Old Jan 6, 2016 | 01:57 PM
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No stall. No it ls not gradual, been doing it for awhile, in drive on flat ground with the brake off it won't roll forward until u give it 2-300 rpm. Then just takes off.
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Old Jan 6, 2016 | 09:45 PM
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In this case I'd begin with fluid level; last TC swap, I
got the car back with about 3 quarts short and it kind
of behaved this way. Marginal pickup at the pump.
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