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Torsen Front Diff Worth It?

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Old Apr 18, 2022 | 11:35 AM
  #11  
Steel City 07's Avatar
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For reference, here is a link to the Auburn Ected MAX locker. I personally wouldn’t use one, but they may actually be a good choice for a number of people on this forum.

https://www.ironrockoffroad.com/prod...31-spline.html

It should fit any 31-spline 8.8, which I believe includes all modern F-150 front axles. Looks like it is approved for front axle applications as well.

I think something like this would complement 4A quite well, given the 4A transfer case and the Ected MAX use the same basic principle of operation.

Last edited by Steel City 07; Apr 18, 2022 at 11:38 AM.
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Old Apr 18, 2022 | 08:57 PM
  #12  
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Originally Posted by SALEEN961
Thank you for the info, I probably won't be able to get there during business hours until Saturday, I just hope it's still there next weekend.



Thank you for the detailed info, what you described makes much more sense to me as I also equate torque steer with a strong pull away from center and I didn't understand why that would occur with a Torsen.

After adding a 4A transfer case to my XLT, most of my day to day driving has been in 4A. Would you think that adding the Torsen front diff would be a good decision for someone who does a lot of spirited driving in 4A? My truck spins hard if I take off too quickly in 2WD, so I'd like to keep 4A as my default setting.
You will be good to go. I drive in auto frequently. The only real difference is if you make a hard turn while accelerating moderate to hard you might experience the heavier steering.
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Old Apr 19, 2022 | 02:40 PM
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Originally Posted by Steel City 07
I’d imagine a clutch-based LSD could actually work quite well in a front application, given that in 2WD the hubs are disengaged and the clutches aren’t wearing. It wouldn’t be as powerful as a helical gear LSD, but certainly cheaper and probably have fewer handling quirks depending upon how much preload the installer sets on the clutch packs.
On the street, clutch based LSDs are not a good option for the front. The locking action ties the wheels together enough that it will cause the car to resist rotation push through the turn. There's a reason why you find torque-biasing diffs on FWD cars, and why Ford specs it on the Raptor/Tremor. When a clutch type LSD locks up it goes 1:1, where a gear type (or cone-clutch type like Mazda has used) goes 1.5-2.5:1 to allow for different tire speeds.

This is also why you don't want clutch type lockup on decel on the rear of a car, because it can make corner entry rotation difficult...unless you are trying to drift in which case 2-way clutch type FTW.

Off-road slow speed I could see it working as a "fusible link" for the drivetrain.
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Old Jan 8, 2023 | 09:56 PM
  #14  
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I'm revisiting these threads: I've had it about a week, and I can't feel it at all. I only have a 4H/4L/2H transfer case, so YMMV with a 4A T-case engaged. As I posted earlier, I had a different vehicle that only had 4A/4H/4L, and I couldn't feel it there either.
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