Cold truck shift issues

SOBX · Jan 23, 2013

On a cold motor, my truck won't shift until I hit 3k rpm's. Any reason why? No CEL, no codes, 2006 FX4 auto. Tranny fluid topped of, clean and doesn't angel burnt.

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Mark Kovalsky · Jan 23, 2013

I've seen this happen when the engine isn't making enough power because it's cold.

SOBX · Jan 23, 2013

That explains a lot. It just may be linked to ficm (which I know is broke) and egr issues I already have.

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jdc753 · Jan 23, 2013

I'm guessing your dropping your foot right into it?

Sounds normal to me, but when the motor is cold I barely put my foot in it and I can have it shift at 1300RPM, but usually pedal it to shift around 2k. Just takes a while to get up to speed is all, talking loaded triaxle dump 0-30 uphill kinda time.

Bluestroke2004 · Jan 27, 2013

Be careful with FICM being bad you do not want to damage injectors. FICM issue can be part of your problem.

3brorce · Jan 27, 2013

jdc753 said:
I'm guessing your dropping your foot right into it?

Sounds normal to me, but when the motor is cold I barely put my foot in it and I can have it shift at 1300RPM, but usually pedal it to shift around 2k. Just takes a while to get up to speed is all, talking loaded triaxle dump 0-30 uphill kinda time.

Sounds normal to me also. I had to let off the throttle to get her to shift for me. Get her going and she would rev then all I had to do is let off the skinny pedal a little to get her to upshift

jdc753 · Jan 28, 2013

Yup, gotta pedal it a little when its cold, can be fun cause you can really make the truck sound like a 6-speed without much trouble, bring up the RPM, let it hang then back out to force the shift and roll back into it, kinda fun lol

SOBX · Jan 28, 2013

Had an old IDI that I had to double clutch. That thing sounded rough when it was cold, but that's neither here nor there. I'll be moving up to the air force academy housing in April and will be able to finally plug the truck in every night. Hopefully I'll be able to get that transmission blanket I've had my eye on for the last month. That should help right?

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3brorce · Jan 28, 2013

No need for trans blanket and I have neer even heard of a trans blanket honestly

Mark Kovalsky · Jan 28, 2013

I've heard of a trans blanket. Drag racers use them to contain the parts in the event of a transmission explosion. I've never heard of one used to keep a trans warm, and I don't understand why someone would need to keep the trans warm, either.

If you kept the engine warm it would fix your cold shift problem. Keeping the trans warm won't make any difference.