Transmission Question

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Mar 21, 2007 | 02:05 PM

eatfish

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Mountain Pass

Joined: Jun 2006

Posts: 197

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Transmission Question

I feel like a goober asking this question, but I dont have much experience driving an automatic transmission. When my 00 Ex 7.3 is cold, it doesn't seem to want to shift into the last gear (when OD drops the RPMs down to 1500 at 55mph) the other gears seam to shift like normal. The colder (between 0 F and -25 F) it is in the morning, the longer it takes to shift. Usually no longer than 5 min of driving. Is this something that should be happening or is it signs of a problem?

Mar 21, 2007 | 02:09 PM

tholt34

Senior User

Joined: Dec 2006

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If i'm not mistaken that is normal. The PCM tells the torque converter not to lock up until the tranny reaches a certain temperature.

Mar 21, 2007 | 06:37 PM

trike1946

Logistics Pro

Joined: Apr 2004

Posts: 4,292

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From: NJ where fun comes to die

How long do you warm your truck up before you drive?

Mar 21, 2007 | 06:44 PM

PowerstrokeJunkie

Post Fiend

Joined: Jul 2005

Posts: 14,582

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From: 21791

That is normal. The torque converter won't lock until a certain temperature, as previously mentioned. It helps it warm up some by creating some slippage --> heat.

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