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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

96 f250 7.3 Auto shifting problems

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Old Aug 30, 2021 | 07:30 PM
  #1  
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From: Andreas,Pa
96 f250 7.3 Auto shifting problems

transmission wiped out had it rebuilt... transmission worked fine for a few hundred miles then It wouldn't shift into passing gear... I figured out that it was the LED brake light bulbs... Put a couple more hundred miles on now I sporadically lose 1st gear. Somedays it's fine other days it won't. Tranny fluid is clean. 3rd brake light is an LED. Any ideas appreciated.. thanks Tom
 
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Old Aug 30, 2021 | 08:40 PM
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My idea is to read the codes. WIthout the codes, all you can do is throw parts at it until you get lucky.
 
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Old Aug 30, 2021 | 08:58 PM
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wwhite
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Smell the fluid, colour should be brilliant red, but is probably burnt and brown in colour, and you may have damaged the TC.

Have you removed the LEDs, and put regular bulbs in?
If you still have LEDs, did you put correct resistors installed with the lights?
 
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