will not downshift

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Mar 8, 2006 | 02:49 PM

willwo12

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Joined: Jan 2004

Posts: 2

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will not downshift

Hi, I am a first time poster here. Have a 96 f350 7.3.auto . Yesterday while driving the truck seemed to lock in third gear while coming to a stop, stalling the engine. I shifted to neutral cranked the engine, shifted to drive and the engine stalled again. Again cranked, then shifted to 1 and it did not stall. I friend told me disconnect the wiring harness on the shift linkage, which i did and it seemed to correct the problem. I tried it again today, same thing, locked up. Again disconnected and reconnected the wiring drove for several miles and seems okay. I know it is going to happen again. Any ideas?

Thank you
will

Mar 8, 2006 | 05:22 PM

444dieselrod

Posting Guru

Joined: Aug 2004

Posts: 2,417

Likes: 4

From: Braham MN

low trans fluid will make the converter stay locked, and do this, could be low, but I realy dont know.

Diesel Rod

Mar 8, 2006 | 06:08 PM

DaBigTow

Elder User

Joined: Mar 2004

Posts: 509

Likes: 1

From: Pasco, WA

Could also be the switch assembly on the tranny (where you're unplugging it), PCM might not realize it's in gear. Ford calls it a "Transmission Range Sensor"; a set of resistors in series to tell what position the shift lever is in.

Mar 8, 2006 | 08:53 PM