Transmission not shifting properly, vehicle stops accelerating and engine just revs?

JOSHUAWLSH0

MEMBER
2008 FORD EXPEDITION
V8
4WD
AUTOMATIC
140,000 MILES

Vehicle stops accelerating and just revs. I can use second gear to get it moving, but every time I put it in drive it doesn't shift into gear unless I step heavy on the pedal, and then it drops back out and revs.

Wednesday, August 2nd, 2023 AT 9:11 PM

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
42,973 POSTS

It sounds like the transmission is low on fluid.

Here is a guide to help you check the level:

https://www.2carpros.com/articles/how-to-check-and-add-transmission-fluid

If the fluid level is okay, I would run the codes because it sounds like the input shaft sensor needs to be replaced. To be sure let's run the codes to see what comes up.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Can I ask if the speedometer is working? If not, I would replace the VSS sensor. Check out the images (below). Please let us know what happens.

Images (Click to make bigger)

SPONSORED LINKS

Was this

answer

helpful?

Yes

No

Thursday, August 3rd, 2023 AT 12:13 PM

JOSHUAWLSH0

MEMBER
2 POSTS

The speedometer still works. I am still able to shift into reverse, and from 2 to 1 and back again. The emergency brake light started coming on and off sporadically (while driving. E-brake is not engaged) at the same time the issue started. I don't know if that's a separate issue, or a side effect of what happening with the transmission.

Was this

answer

helpful?

Yes

No

Thursday, August 3rd, 2023 AT 12:24 PM

KEN L

MASTER CERTIFIED MECHANIC
42,973 POSTS

That could be did any codes come up. You can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon.

here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

and

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Here is one for about $99.00 if you need it:

https://amzn.to/3ZixY4v

Please go over these guides and get back to us.

Was this

answer

helpful?

Yes

No

+1

Friday, August 4th, 2023 AT 10:15 AM