shifting into OD
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shifting into OD
All... i have an 01 f250 7.3 with an auto trans. When i start out on the road, the trans won't shift into OD until about i've driven about 7 miles. Is this a normal thing for the trans to warm up before shifting? thanks, Jeff
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Joined: Mar 2007
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From: East Peoria, IL
Originally Posted by avidbowhunter
I don't know about tourque conv. lockup, but the tach reads about 2200 rpm's at 55 when cold and then drops to about 1700 when it shifts into OD.
What your seeing is 2200 RPM's at 55 in OD, then your tranny warms up enough and the torque converter locks up, hence the reduction in RPMs to 1700. Completely normal operation.
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Joined: Mar 2007
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From: East Peoria, IL
hmm i cant think off of the top of my head, but I belive mine is close. Remember, shift points and TC lock up points will be different with a chip/tuner.
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Post Fiend
Joined: Feb 2007
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From: Dallas-Ft. Worth
I'll put it another way... I have to really watch & listen for it, and still have trouble seeing it. It's such a minor change in my truck (before & after having the tuner), that I know it's not 500 RPM. It might be 100 or 200, tops.
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Posting Guru
Joined: Mar 2007
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From: East Peoria, IL
everyone's must be different. Mine is a decent decrease. I dont have a factory TC though. Its all in the stall speed of the TC i do believe.
I have even noticed each truck has different TC lcokup patterns
I have even noticed each truck has different TC lcokup patterns
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Joined: May 2006
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From: dryden,michigan
well they do say 01-02-03's have have a weak tq converter i guess higher stall?? it might be 1900-2000 its around there tho i hate lookin because i can just see my gas gauge moving down hahaha