Better Locking Differential

[crouse]

I run several Auto Cross events each year. I'm looking for a better locking differential. Even with new carbon fiber clutches, I'm still spinning the unloaded rear wheel.

I see the Eaton TrueTrac, Auburn and Yukon differentials. Does anyone have any experience with either of these. Is the Detroit Locker noisy? Any other options?

[sailsmen]

I've had the Detroit Truetrac for 7+ years and never know it's there, works perfectly for Drag Racing.

[crouse]

Do you think the Detroit Locker would work ok when cornering under mid to full throttle when running an auto cross?

[sailsmen]

Probably, but I don't know for sure. Try contacting Eaton.

[blazen71]

I don't think a locker would be good. they unlock on turns when you let off the throttle and re-engage when you accelerate and it can be harsh.

[crouse]

How about a spool? :) Might make daily driving a little challenging when making tight corners.

[fastblackmerc]

How about a spool? :) Might make daily driving a little challenging when making tight corners.

I wouldn't unless you always drive in a straight line.

[Joe Walsh]

Detroit TrueTrac/Torsen differentials are the way to go.
They come standard in Shelby GT350 and GT500s and are part of the Mustang GT performance/track pack option.


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[crouse]

Detroit TrueTrac/Torsen differentials are the way to go.
They come standard in Shelby GT350 and GT500s and are part of the Mustang GT performance/track pack option.

Is this the model you were referring to?

https://www.summitracing.com/parts/dtl-912a562

[justbob]

The LAST thing I’d want on an auto cross track is a locker! I’d even prefer an open rear end of it!

My 4x4 F150 has an open rear end and I wouldn’t want anything else on turns. I live in the suburbs so there is a lot of turns/curves. When I’m in the Marauder I literally can’t give it much gas even on dry cold pavement but I can hammer the truck and only need to worry about the weight of the vehicle spinning me out.


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[Mr. Man]

Just don't get that truck on an ice cube size piece of snow w/ an open diff. Hope it's easy to put in 4x4.

[justbob]

Just don't get that truck on an ice cube size piece of snow w/ an open diff. Hope it's easy to put in 4x4.

I’ve only got it stuck once. Of course the tires were half bald, old, and hard, plus I was pushing show with my bumper trying to get access to my car trailer in my Moms backyard (about an acre). I made it 3/4 of the way in though! Actually it only happened because I had to lose my momentum and turn around to back up to the trailer. A little shoveling freed her up, grabbed the trailer and planted the go pedal. Made it out just fine.

I’m just glad it wasn’t much farther in because the drifts just got deeper! At first I couldn’t even make out what snow mound my trailer was under plus the snow was several inches up the door skin when I tried to get out. [emoji43]

But six or so Chicago winters now and that’s been all. Last year with the new 33’s I think I only used 4 wheel once? The front end definitely is a limited slip of some sort and that’s been just perfect. Way safer IMO than all my old LSD trucks. Thought I’d hate it at first and planned to change it, I’m just glad I procrastinated! [emoji1303]


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[GreekGod]

I have driven my daily driver Marauder many thousands of mile with 4.10 gears and a Detroit Locker rear differential.

I probably should have installed a Trutrac, as Eaton recommended when I talked to them, but already had the "Locker" installed.
The Trutrac would be better for the street, but I wanted the "stronger" D Locker.

It is no problem on the street or in snow, but does have inherent backlash, which is noisy, especially when backing up.

[cheapthrillb2]

I have a Trutrac in mine. I don't notice it much. But sure is nice when I want it.

Yukon clutch style is garbage. I literally blew it into pieces a month out of warranty and was told tough luck.

[hotford]

I’ve had a Cobra carbon clutches in my car for 10 years withno issues, remember when rebuilding them there is two thickness shims that gointo the side gears .0025 or .0045, for a tighter clutch set up use the thickerone!

CHRISRISTOVSKI

[crouse]

I had my rear end completely rebuilt by a local shop a few months ago. Used carrier from MustangEddy, new carbon fiber clutches, new spring, new axles, and new axle bearings. When I jack up drivers side rear, I can turn the rear wheel with a little bit of effort. it seems to me that it should take a little more effort to turn that rear wheel. I hope the shop didn't install the clutches incorrectly. I thought I read it should take about 200 ft/lbs of torque to break loose?

[GreekGod]

Clutch differentials are always a temporary installation. Ford's 8.8" is somewhat durable, but always wearing out with use. In a 9", a clutch diff is just a waste of money, as they are not durable, especially compared to an 8.8".

For the street, a Trutrac is the best option