Erratic Transmission @ 55 MPH
New User
Joined: Nov 2002
Posts: 1
Likes: 0
From: Moore USA
Erratic Transmission @ 55 MPH
How to explain the problem -Lets try - I have a 94 Ranger XLT with 4.0 Automatic (A4LD). Seems the tranny wants to down shift and then upshift between overdrive and 3rd. It usually happens around 55 mph. I'm wondering if there is a vehicle speed sensor that controls this? If so how is it tested? And where on the tranny is it located? The problem happens with and with out cruise control engaged.
Anyone have any experience with this type problem?
Thanks -
Anyone have any experience with this type problem?
Thanks -
Posting Legend
Joined: Sep 2001
Posts: 30,255
Likes: 37
Erratic Transmission @ 55 MPH
I don't think your transmission is electronically controlled but I could be wrong. You might need an engine tuneup.
Any ideas people?
If you don't get a reply here, may I suggest the Transmission Forum?
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Any ideas people?
If you don't get a reply here, may I suggest the Transmission Forum?
Thanks for using FTE!
[font color=red]As a Moderator I do not "Subscribe" to most topics,
please send email/pm if you need a reply -Thanks![/font]
-
Logistics Pro
Joined: Sep 2002
Posts: 4,411
Likes: 1,016
From: Central KY
Erratic Transmission @ 55 MPH
My mother had a '95 Explorer 4.0 with the same problem. At 55, the truck could never decide which gear it wanted...3 or OD. 55 is a very unconvenient speed to program a shift point...gee thanks Ford.
Our solution...we sold it.
Fortuneatly, my Ranger has the new 5-speed auto and I haven't had this problem yet.
I always thought a gear ratio change in the rear end would probably solve the issue. This would be easier to do if your truck is 2-wheel drive. The new gear ratio would change the engine RPM at 55, which would hopefully eliminate the constant searching for a gear. There may be other ways to fix the issue, but I don't know of any. That tranny is electronic, right? So there's not a whole lot else you can do about it.
Our solution...we sold it.
Fortuneatly, my Ranger has the new 5-speed auto and I haven't had this problem yet.
I always thought a gear ratio change in the rear end would probably solve the issue. This would be easier to do if your truck is 2-wheel drive. The new gear ratio would change the engine RPM at 55, which would hopefully eliminate the constant searching for a gear. There may be other ways to fix the issue, but I don't know of any. That tranny is electronic, right? So there's not a whole lot else you can do about it.
Freshman User
Joined: May 2002
Posts: 42
Likes: 0
From: The Woodlands USA
Erratic Transmission @ 55 MPH
There are a number of things that can cause this to happen. On mine the torque converter use to go in and out of lockup at 70 (about 3K rpm). It was a result of the condition of the transmission. At the last transmission overhaul, that I just did at 340K miles, I put in a shift kit, which modifies some of the valving in the control body. No more in and out of lock-up at 70 mph.
Good luck
Rob
Good luck
Rob
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