Tranny Problem: Flashing O/D & hard shifts - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 4 (permalink) Old 08-16-2013, 07:04 AM Thread Starter
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Tranny Problem: Flashing O/D & hard shifts

Greetings to all:

The Truck - 1994 F250 RWD, XLT Turbo 7.3L IDI (Pre PSD) Stock - E40D

The Problem - O/D Off Light is Flashing and am experiencing hard shifts up and down.

Just started yesterday. I thought that I may have done something when I changed the ATF over this past weekend. I included new filter and did drain the TC as well. Got about 14 quarts in all. Replaced with NAPA premium Dex/Merc III.

Monday and Tuesday all went well, nice smooth shifts over about 175 miles over both days. Then Wednesday came

After about 20 miles of driving on the highway, there was a big slow down and when I started to go again, gained speed. Then the first shift to the next gear was hard, & I said Huh. Then the next shift & it was harder yet. Then I noticed the flashing O/D light. Did not go away overnight. Still there today.

I pulled codes & I got a 23 (Current KOEO) and then a 62 from "Memory". I did have the go pedal down when the Scanner was communicating with the trucks computer.

These are what the definitions of the above codes are:
  • 23 for Diesel Truck - Fuel Injector Pump Lever Sensor input is out of self test range.
  • 62, Trucks only - Transmission 4/3 circuit fault

Okay, now what do I do? Where do I begin? I have no idea what the first code's (23) sensor is and I haven't a clue as to what the DTC 62 means.
Please help

Truck #1 - 1996 F250 SuperCab, 4x4 PSD, Turbo 7.3L
  • AFE Air
  • Stage I Rebuilt Injectors
  • 4" DP - 5" Tail
  • Cat & Muffler Delete
  • TS Performance Chip
  • 4" Lift
  • ProComp ProRunners
  • AutoMeter Phantom II 3 Guage Pod: Boost, EGT, Trans oil temp
[/LIST]
Truck #2 - 1994 F250 SuperCab RWD, IDI 7.3L Stock
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post #2 of 4 (permalink) Old 09-21-2013, 11:12 PM
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tranny problem

you've probably got it fixed by know,but sounds like throttle position sensor,is out of range,maybe.i'm guessing it's a e40d tranny,they're picky,good luck.

89 F250 HD 7.3L IDI E4OD TRANNY 4IN" EXHAUST WITH FLOWMASTER 40 SERIES PUMP TURNED UP 1 FLAT SOUP BOWL MOD HOMEMADE AIR INTAKE B&M SHIFTKIT,MANUAL TQ CONV LOCKUP MANUAL GP SWITCH BILLET GRILLE,DRIVING LIGHTS IN BUMPER LED CAB LIGHTS,20% TINTED WINDOWS GOOSENECK AND RECEIVER HITCHES
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MOSTLY HAULIN HAY AND HORSES 24,000lb.GVW TRANNY COOLER WITH FAN
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post #3 of 4 (permalink) Old 10-01-2013, 09:26 AM
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what i guess the ideas and suggestions are good but some concrete solutions are the better way to go with under such circumstances
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post #4 of 4 (permalink) Old 10-03-2013, 11:13 AM
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you are right Monty as relying on not so reliable solutions and remain in dark while heading for a fix does not meant to come with the best results
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