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Torque Converter Lockup when cold?

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Old 02-18-2010, 09:20 AM   #1
MattN03 [OP] MattN03 is offline
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Torque Converter Lockup when cold?

I've noticed that the torque converter doesn't lock up after shifting into 5th on level ground (approx 55-60 MPH) until I've gone a couple miles down the road when the truck is completely cold. Once the truck gets up to temp, the converter always locks up by 55-60 MPH. Is this normal? Is this because the truck is still in open loop?

I've had a manual for the past 10 years, so the auto still behaves strangely to me sometimes...
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Old 02-18-2010, 09:38 AM   #2
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Quote:
Originally Posted by MattN03 View Post
I've noticed that the torque converter doesn't lock up after shifting into 5th on level ground (approx 55-60 MPH) until I've gone a couple miles down the road when the truck is completely cold. Once the truck gets up to temp, the converter always locks up by 55-60 MPH. Is this normal? Is this because the truck is still in open loop?

I've had a manual for the past 10 years, so the auto still behaves strangely to me sometimes...
Normal
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Old 02-18-2010, 04:54 PM   #3
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Good to hear! Thanks!
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