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transmission question


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oldjoe
Novice

Jul 13, 2021, 2:22 PM

Post #1 of 9 (455 views)
transmission question Sign In

I have a 2004 F-150 Heritage. The transmission went out so I purchased a used one online. After installing it I am getting a speed sensor error. So I replaced it rebooted the computer checked the wiring. But now I drive it shifts fine up to 60 MPH. but after 100 yards it drops into first gear.
When I took out the old transmission a long rubber tube connected to a steel tube and back to rubber fell out of engine area. So was unable to figure out what and where that tube goes and what it does?


gsferraro
Enthusiast

Jul 16, 2021, 5:56 PM

Post #2 of 9 (401 views)
Re: transmission question Sign In

Hello,
Are you talking about a cooler line, they are usually metal and rubber. So if it drops back down to first, what code are you getting? P0720?


oldjoe
Novice

Jul 18, 2021, 3:36 AM

Post #3 of 9 (332 views)
Re: transmission question Sign In

Np this line is on top the transmission


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Jul 18, 2021, 3:42 AM

Post #4 of 9 (330 views)
Re: transmission question Sign In

That's not what was asked? Is it getting that code - this guy is the site's transmission expert with limited time here so fix your response or a new one with code, T


gsferraro
Enthusiast

Jul 18, 2021, 12:36 PM

Post #5 of 9 (306 views)
Re: transmission question Sign In

Hello,
Could be a vent tube also. Gary


oldjoe
Novice

Jul 18, 2021, 1:51 PM

Post #6 of 9 (298 views)
Re: transmission question Sign In

Everything i find it says its a vent tube. But what puzzles me such and expensive rubber to steel part for just a vent tube!
Error code is PO780 Says speed sensor but I have tried 2 other ones and no change


oldjoe
Novice

Jul 19, 2021, 7:50 AM

Post #7 of 9 (269 views)
Re: transmission question Sign In

Oops my bad it is PO720 speed sensor.
Is there a speed sensor inside the transmission itself. There are a lot of wires in that harness


(This post was edited by oldjoe on Jul 19, 2021, 7:53 AM)


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jul 19, 2021, 10:32 AM

Post #8 of 9 (255 views)
Re: transmission question Sign In





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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



gsferraro
Enthusiast

Jul 20, 2021, 4:55 PM

Post #9 of 9 (214 views)
Re: transmission question Sign In

Hello,
That picture is correct. Gary






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