Tranny temp issues
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,732
Likes: 2,661
From: SE Florida
It's not that reverse is weak, it's the way the trans is used in reverse.
First, there is very little airflow over the trans cooler in reverse. Second, reverse is usually very low speed, which means a large slip ratio in the torque converter. This creates A LOT of heat. And with little or no airflow, there is nowhere for all that heat to go, so it stays in the trans.
Using 4L for backing adds a ratio of 2.7:1 to reverse gear, reducing the load on the trans 2.7 times.
First, there is very little airflow over the trans cooler in reverse. Second, reverse is usually very low speed, which means a large slip ratio in the torque converter. This creates A LOT of heat. And with little or no airflow, there is nowhere for all that heat to go, so it stays in the trans.
Using 4L for backing adds a ratio of 2.7:1 to reverse gear, reducing the load on the trans 2.7 times.
Thread Starter
|
New User
Joined: Feb 2017
Posts: 22
Likes: 0
It's not that reverse is weak, it's the way the trans is used in reverse.
First, there is very little airflow over the trans cooler in reverse. Second, reverse is usually very low speed, which means a large slip ratio in the torque converter. This creates A LOT of heat. And with little or no airflow, there is nowhere for all that heat to go, so it stays in the trans.
Using 4L for backing adds a ratio of 2.7:1 to reverse gear, reducing the load on the trans 2.7 times.
First, there is very little airflow over the trans cooler in reverse. Second, reverse is usually very low speed, which means a large slip ratio in the torque converter. This creates A LOT of heat. And with little or no airflow, there is nowhere for all that heat to go, so it stays in the trans.
Using 4L for backing adds a ratio of 2.7:1 to reverse gear, reducing the load on the trans 2.7 times.
Thread
Thread Starter
Forum
Replies
Last Post
WestCoast
1999 - 2003 7.3L Power Stroke Diesel
7
Oct 17, 2008 05:30 PM
kurthb
Explorer, Sport Trac, Mountaineer & Aviator
4
May 9, 2004 05:54 PM
