CODE 21 & 24
Lead Driver
Joined: Oct 2016
Posts: 6,185
Likes: 633
From: Houston/Sugar Land
You said AOD i believe so not sure what you have. Here is how to tell Verify please
- If the shifter has a P-R-N-OD-D-1 pattern, the transmission must be an AOD (applicable to 1980-1993 vehicles).
- If a 1989-1993 truck has an Overdrive Cancel Switch and a P-R-N-OD-2-1 shifter pattern, then it is equipped with an E4OD transmission.
4wd Low
Joined: Jan 2021
Posts: 13
Likes: 1
You said AOD i believe so not sure what you have. Here is how to tell Verify please
- If the shifter has a P-R-N-OD-D-1 pattern, the transmission must be an AOD (applicable to 1980-1993 vehicles).
- If a 1989-1993 truck has an Overdrive Cancel Switch and a P-R-N-OD-2-1 shifter pattern, then it is equipped with an E4OD transmission.
Lead Driver
Joined: Oct 2016
Posts: 6,185
Likes: 633
From: Houston/Sugar Land
6th Gear
Joined: Oct 2017
Posts: 6
Likes: 0
I am just working on my truck as we speak and I was referencing the forum to try and figure out what some of these codes meant in my vehicle and when I read that I knew that to be wrong at least from everything I had learned so far on my own so I wanted to comment on it for future people such as myself looking back at these old posts old threads and see if I could possibly save somebody a little bit of time and hardship I do have a question for you I was driving to work one day and my truck was in here I went around a corner I went to accelerate out and my truck still showed being in gear but it was not catching I guess is the word is this what is commonly known as gear slippage if so what is the best way to test and/or diagnose this I had recently done the rear differential fluid but other than that no work has been done to transmission since I've owned it this truck only has a hundred and fifty five thousand on it and it is a 93 Ford F150 5.0 rear wheel drive any help is much appreciated
I have had similar issues with my transmission(E150 5,0EFI 1989) after a bigger engine overhaul some time ago, and I have been sure it is caused by the lack of mechanical adjustment procedure between the transmission and throtllebody. Now it has been getting worse, and now the engine-light is on constantly as it has never before lit up. I get codes 21, 24 and 53. (ECT and ACT out of range, and TPS over maximum voltage)
Anyone encountered this?
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