4R100 issues

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Nov 17, 2020 | 08:03 PM

#16

Listor

Fleet Mechanic

Joined: Sep 2011

Posts: 1,613

Likes: 106

From: Albuquerque

Quote:

Originally Posted by JSPEX

Here's food for thought, or maybe everyone except me already knows the answer.. the shop owner said he has seen similar things before and has a theory that it may be the throttle position sensor malfunctioning and sending wrong signals to the computer, thereby causing shifting errors. Or something like that. Anyone have any thoughts about that?

thats very interesting honestly, I am going to do a little experiment and pull my tuner , run it like that for a couple of days and see what issues are still there! If so I will look into the throttle position sensor, if not I’ll have more questions! Lmao

Nov 25, 2020 | 12:02 PM

#17

Karlow

More Turbo

Joined: Nov 2016

Posts: 545

Likes: 2

From: SGV SoCal

I have seen that TPS screw with the transmission of a F150 I picked up an an auction once.
Use TQ pro to test the TPS. You can also use TQ pro to see the slippage of the trans when convertor is locked.