5 speed torque shift trans
Super Moderator
Joined: Oct 2005
Posts: 24,308
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From: SW Virginia
There is another thread going on right now concerning torque and the Torqshift. Nothing about HP but then again, I haven't read anything about the HP capacity of these. Most are concerned about the torque because you'll likely reach your torque limit far before you reach any HP limit.
https://www.ford-trucks.com/forums/8...ne-torque.html
https://www.ford-trucks.com/forums/8...ne-torque.html
Lead Driver
Joined: Jul 2007
Posts: 7,868
Likes: 9
From: Rhode Island
Horsepower is a RPM x Torque / 5252. HP does not kill transmissions, torque does.
Also, like it was mentioned, a stalled torque converter (ie, full throttle from a dead stop) will nearly double torque.
A transmission rated for 800ft-lbs (not necessarily the torqshift) could take 600HP @ 8000 RPM all day long because that is only 393(/786 after the torque converter) ft-lbs of torque . While a 600HP @ 2800 RPM diesel would rip it to shreds, because that's 1125(2250 post converter) ft-lbs of torque.
Also, like it was mentioned, a stalled torque converter (ie, full throttle from a dead stop) will nearly double torque.
A transmission rated for 800ft-lbs (not necessarily the torqshift) could take 600HP @ 8000 RPM all day long because that is only 393(/786 after the torque converter) ft-lbs of torque . While a 600HP @ 2800 RPM diesel would rip it to shreds, because that's 1125(2250 post converter) ft-lbs of torque.
Senior User
Joined: Mar 2003
Posts: 296
Likes: 0
From: El Cajon, CA
"Originally Posted by blackhat620
There are some mistakes in the information at this link:
The Torqueshift was installed in 2003 PSD trucks equipped with the 6.0.
The transmission is really a 6-speed
1st = 3.09:1
2nd = 2.20:1
3rd = 1.54:1
4th = 1.09:1
5th = 1.00:1
6th = 0.71:1
The transmission only uses 5 gears at a time depending on engine temperature.
Cold Engine Temps = 1,2,3,4,6
Warm Engine Temps = 1,2,3,5,6"
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gearhead5
1987 - 1996 F150 & Larger F-Series Trucks
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Aug 19, 2016 11:04 PM
