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-   -   Transmission Slow to Respond - Reverse & Downshift (https://www.ranger-forums.com/drivetrain-tech-37/transmission-slow-respond-reverse-downshift-160037/)

TikiGod77 Dec 31, 2019 12:41 PM

Transmission Slow to Respond - Reverse & Downshift
 
Bought my 16 yr old a 2005 Ford Ranger XLT Supercab, 4x4, automatic, 4.0L V6. We have gone over the truck and changed all of the filters and fluids. There is still a nagging issue with the transmission. When you shift into reverse, it pauses for about 2-3 seconds before it goes into gear. Also, when you really get on it and the transmission downshifts, the hesitation happens again. Once it goes into gear, there no slipping; it's like something is sticking and keeping it from engaging right away. It does not have this hesitation if you shift directly into drive and while driving normally. Any ideas for what is happening or any suggestions on how to fix it?

RonD Dec 31, 2019 08:41 PM

Welcome to the forum

So no hesitation in Drive, only in Reverse, but it does hesitate in Drive after warm up while driving

All automatics work on fluid pressure, not a Ford thing
125psi for forward
175psi for reverse <<< this is why automatics often lose Reverse first, or get a delay

If you Raise RPMs does Reverse engage faster
Higher RPMs increase the Pump Speed so raises pressure in the system

Because it may be a pressure issue there are many places pressure can leak
So it can't be a "this is the problem, replace it" answer
Its "probably" a Valve Body issue, which is a safe GUESS, since all the pressure is routed thru it, lol

There is an EPC(electronic pressure control) solenoid in the valve body which may be a place to start

You have a 5R55E model transmission, but its exactly the same as 4R44E, 4R55E and 5R44E
Google it to see what your symptoms match



TikiGod77 Jan 1, 2020 12:12 AM

Thanks, I'll look into that. As for raising the RPMs and trying it, anything above 800 rpm and it slams into reverse.

RonD Jan 1, 2020 12:18 PM

So reads like a pressure issue, there are products like "Trans Fix" that contain friction modifiers and gasket swelling chemicals, they don't hurt anything and can increase pressure by sealing small leaks, its not a "fix" but can prevent slipping which will damage clutches and brakes(bands)

Trans shop can test pressure, or you can with the right gauges, but trans shop may be able to interpret pressures better
Pressure info is available online


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