1991 Explorer A4LD
Thread Starter
|
New User
Joined: Mar 2002
Posts: 12
Likes: 0
1991 Explorer A4LD
I just noticed today when my truck shifts from 1-2 and from 2-3 under aprox 1/4 throttle the rpm drops very little between shifts.
To be more specific. From a stop accelerate to road speed...(50mph)...at 1/4-1/2 throttle the truck starts out in 1st gear hits approx 3k rpm then shifts to second (drops rpm only a couple hundred while vehicle speed steadly increases), engine climbs a few hundred more RPM then shifts to 3rd dropping RPM only a couple hundred again.... Once the truck goes into overdrive RPM drops approx 500 - 1k RPM.
Now if I start out under full acceleration (pedal to the metal) it goes to approx 5k rpm and drops approx 1k - 1.5k rpm between 1-2-3 shifts (more defined shifting).
Does this sound like a problem? I don't drive the truck much being it's my wifes ride thus I only recently noticed it.
To be more specific. From a stop accelerate to road speed...(50mph)...at 1/4-1/2 throttle the truck starts out in 1st gear hits approx 3k rpm then shifts to second (drops rpm only a couple hundred while vehicle speed steadly increases), engine climbs a few hundred more RPM then shifts to 3rd dropping RPM only a couple hundred again.... Once the truck goes into overdrive RPM drops approx 500 - 1k RPM.
Now if I start out under full acceleration (pedal to the metal) it goes to approx 5k rpm and drops approx 1k - 1.5k rpm between 1-2-3 shifts (more defined shifting).
Does this sound like a problem? I don't drive the truck much being it's my wifes ride thus I only recently noticed it.
Mountain Pass
Joined: Mar 2002
Posts: 148
Likes: 34
From: Clarksville
1991 Explorer A4LD
It sounds exactly the same as my 91 xlt 2wd. When I bought it the fuse was pulled from the power dist box, under the hood. I left it that way until recently, because it seemed to shift okay, and I hadn't bothered to look it up in the shop manual. Upon further review of the trusty Helm bible, I inserted a 40 amp fuse in the slot and noticed no change. Interesting. I thought I had a problem, too. My Explorer has 136000 miles on it and has had no engine or tranny work done.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,738
Likes: 2,668
From: SE Florida
1991 Explorer A4LD
>Does this sound like a problem?
It sounds normal. during light acceleration the torque converter is "looser" and absorbs some of the RPM drop. At higher RPM the torque converter "tightens up" and does not slip as much.
Mark
It sounds normal. during light acceleration the torque converter is "looser" and absorbs some of the RPM drop. At higher RPM the torque converter "tightens up" and does not slip as much.
Mark
Thread
Thread Starter
Forum
Replies
Last Post
carguy3j
1999 - 2003 7.3L Power Stroke Diesel
92
Jun 9, 2021 06:16 AM
corzolek
Clutch, Transmission, Differential, Axle & Transfer Case
9
Oct 18, 2015 09:19 PM
seebeexee
1994.5 - 1997 7.3L Power Stroke Diesel
8
Jun 9, 2013 09:32 PM
