Tranny and TC questions? - Ford Powerstroke Diesel Forum
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Old 08-04-2008, 06:26 PM
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Tranny and TC questions?

Ive got a 99 7.3 with the 4r100. This tranny is a 4 speed correct? (including overdrive) my question is i feel 4 "shifts" so can anyone help me out as to when i should feel my torque converter lock up? My tranny is a little built up but i want to get a BTS. I would just like to know a little more about mine for now. Also, when i do 4wd launches the tranny will like go in and out then back into 3rd but be at like 1100-1200 rpms, but im not sure if that is the torque converter not sure to lock or not? the OD light does flash but once i shut the truck off and restart it the tranny shifts smooth again. Sorry for the long post but i just can't seem to understand this transmission yet thanks guys
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Old 08-04-2008, 06:28 PM
Other vehicle is an F250
 

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I feel my TC lock up. Does feel and look (tach) like another gear.
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Old 08-04-2008, 06:33 PM
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Where abouts in the mph frame do you feel this? i know it might be a little different because you have 35s. Driving normally does it lock right before over drive or after shifting second?
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Old 08-04-2008, 06:35 PM
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Factory locks TC between 3rd and 4th. Feels just like a gear shift.
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Old 08-04-2008, 06:39 PM
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so it locks before overdrive? overdrive is technically 4th gear right? thanks for the quick responses guys
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Old 08-04-2008, 06:41 PM
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Quote:
Originally Posted by tonypagnano View Post
so it locks before overdrive? overdrive is technically 4th gear right? thanks for the quick responses guys
Yes sir. Lockup before OD.
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Old 08-04-2008, 06:44 PM
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Thanks Shane. You know more about my tranny than me! Ever install a TW chip?
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Old 08-04-2008, 06:46 PM
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Originally Posted by Hank View Post
Thanks Shane. You know more about my tranny than me! Ever install a TW chip?
I know just enuff to get me in trouble.
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Old 08-04-2008, 06:56 PM
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haha, shane have you ever dynoed your truck if you don't mind me asking? i have pretty much the same mods as you and i just havent been able to get on a dyno yet. Im hopin to see like 300hp 600 ftlb but you never know
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