4R100 gone kaput
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Joined: Feb 2021
Posts: 30
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From: Orlando
4R100 gone kaput
Unhappy Transmission blown or?Was going on an on ramp to a highway, my truck started vibrating and sputtering like it was running out of fuel and wouldn't go past 55mph. Suddenly BLAM! A cloud of black smoke. Pulled over, had full rev range in park and neutral and went back on the road, shifted normally from first, getting to second went a bit over 2500 before shifting then in third it would stay at 60 and go all the way to 3000rpm+ before starting to bog down again. I have no engine light or anything. Did I lose my overdrive or is this engine based? What kind of parameters should I look for using FORScan?
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Joined: Dec 2012
Posts: 4,239
Likes: 1,369
From: Lake Stevens, WA
Tell us about your truck, year/model, miles, any mods, last things you repaired or replaced.
Always helpful to load up all the PIDs in the how-to thread below and log some idle time, a normal drive, and a WOT run, or a run to recreate the issue and capture it.
https://www.ford-trucks.com/forums/1...d-q-and-a.html
How is the transmission fluid level? When was the last time it was serviced?
An audible "Blam" and black smoke during hard acceleration would point to a blown CAC boot. I would expect it to keep smoking when you pulled back on the road though.
Always helpful to load up all the PIDs in the how-to thread below and log some idle time, a normal drive, and a WOT run, or a run to recreate the issue and capture it.
https://www.ford-trucks.com/forums/1...d-q-and-a.html
How is the transmission fluid level? When was the last time it was serviced?
An audible "Blam" and black smoke during hard acceleration would point to a blown CAC boot. I would expect it to keep smoking when you pulled back on the road though.
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