1998 F150 Issue.
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7th Gear
Joined: Dec 2023
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From: KNOXVILLE
1998 F150 Issue.
Good morning,
I am having some issues with my 1998 4.2 automatic truck. Just installed a reman trans, radiator, and trans cooler maybe 5k ago. Well, trucks been doing great 145K miles. Well, over the weekend it started having a miss fire under load. Then everyday got worse but seems to clear up once truck is warmed up. Doesn't throw any codes. Changed the plugs. Didn't help so I ordered coil pack and wires. Supposed to be here tomorrow. On my way to work this morning it missed then acted like it didn't want to shift into 3rd and then shifted hard. It did that a few times and then the OD switch light flashed twice and went off. I know that means trans issue but could a possible bad coil pack and harsh misfire cause the trans to maybe "freak out" and flash the OD light? before this morning it hasn't done anything like that but it missed a lot harder this morning.
I am having some issues with my 1998 4.2 automatic truck. Just installed a reman trans, radiator, and trans cooler maybe 5k ago. Well, trucks been doing great 145K miles. Well, over the weekend it started having a miss fire under load. Then everyday got worse but seems to clear up once truck is warmed up. Doesn't throw any codes. Changed the plugs. Didn't help so I ordered coil pack and wires. Supposed to be here tomorrow. On my way to work this morning it missed then acted like it didn't want to shift into 3rd and then shifted hard. It did that a few times and then the OD switch light flashed twice and went off. I know that means trans issue but could a possible bad coil pack and harsh misfire cause the trans to maybe "freak out" and flash the OD light? before this morning it hasn't done anything like that but it missed a lot harder this morning.
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7th Gear
Joined: Dec 2023
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From: KNOXVILLE
That has nothing to do with what I am asking.... that was why I changed the transmission in the past.
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From: WA
Good morning,
1998 4.2 automatic truck.
over the weekend it started having a miss fire under load. Then everyday got worse but seems to clear up once truck is warmed up. Doesn't throw any codes.
On my way to work this morning it missed then acted like it didn't want to shift into 3rd and then shifted hard. It did that a few times and then the OD switch light flashed twice and went off.
could a possible bad coil pack and harsh misfire cause the trans to maybe "freak out" and flash the OD light? before this morning it hasn't done anything like that but it missed a lot harder this morning.
1998 4.2 automatic truck.
over the weekend it started having a miss fire under load. Then everyday got worse but seems to clear up once truck is warmed up. Doesn't throw any codes.
On my way to work this morning it missed then acted like it didn't want to shift into 3rd and then shifted hard. It did that a few times and then the OD switch light flashed twice and went off.
could a possible bad coil pack and harsh misfire cause the trans to maybe "freak out" and flash the OD light? before this morning it hasn't done anything like that but it missed a lot harder this morning.
I don't have an answer for the question about a poor running engine causing transmission problems. But, I wonder if an electrical problem could cause all of the problems. Bad grounds, wet GEM, etc.
You should have the new coil pack in hand. Install it, check all of your wires and connections, and see if the engine problem is gone. Then focus on the transmission problem. Hope you bought Motorcraft, it's worth the extra considering how long a coil pack lasts.
Another thing to consider is that a typical "stuttering" transmission problem might feel like an engine miss. Are you positive that the engine is misfiring? Good luck.
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