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Old 03-05-2007, 12:21 PM   #1
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Join Date: Jun 2002
Location: MA
Posts: 432
Car: 1982 Z-28
Engine: 383
Transmission: Turbo 350
Axle/Gears: Det. Posi, Superior Axles, 3:73 G

Classifieds Rating: (1)

Detroit Tru Trac or Eaton Posi???

I'm putting in a new posi and doing the usual street performance upgrades (welding the tubes, 28 spline Superior Axles, Solid Pinion Spacer, 3.73's GM gears) but was wondering about the Detroit or Eaton. I'm not familiar with Detroit Tru Trac - is this a good unit? Is there any large difference between the two? Which would be recommended for the street? Any problems with the two choices? Thanks.
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Old 03-05-2007, 12:26 PM   #2
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Join Date: Dec 2006
Posts: 82
Car: 91 Camaro RS
Engine: 305
Transmission: 700R4
Axle/Gears: 3.42's Locker

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I just put in my 3.42s and eaton locker. So far so good, the locker is doing what it was made for. People have given me a lot of flack about putting the locker in. I guess they aren't very strong or hold up very well. But i only have a near stock 305, and I don't beat my car hard. Just my 2 cents.
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Old 03-05-2007, 02:15 PM   #3
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Join Date: Oct 2006
Location: ludlow mass
Posts: 250
Car: 02 Mustang
Engine: 3.8 about to be punched out to 4.3
Transmission: 4R70W
Axle/Gears: 3.73 Detroit true trac

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the detroit true trac is a gear driven diff that doesnt use any clutches, so it is very strong
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Old 03-05-2007, 05:29 PM   #4
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Join Date: Jun 2002
Location: MA
Posts: 432
Car: 1982 Z-28
Engine: 383
Transmission: Turbo 350
Axle/Gears: Det. Posi, Superior Axles, 3:73 G

Classifieds Rating: (1)

and it's cheaper than the Eaton...does the Detroit make any noises? I hare of some lockers making noises as you turn.
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Old 03-05-2007, 06:00 PM   #5
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Join Date: Oct 2006
Location: ludlow mass
Posts: 250
Car: 02 Mustang
Engine: 3.8 about to be punched out to 4.3
Transmission: 4R70W
Axle/Gears: 3.73 Detroit true trac

Classifieds Rating: (0)
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theres two detroit units, one is a locker, which you dont want, the other is a true trac, its a limited slip just like every other one but gear driven vs. clutches
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2002 V6 mustang 4R70W vert
just a slow V6 with 10lbs of weight in the truck...
SOLD: 1992 LO3 camaro bolt ons and gear: 16.1 @85 mph 2.2 60'
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Old 03-05-2007, 06:05 PM   #6
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Join Date: Jan 2004
Location: The "D"
Posts: 1,744
Car: A Portly 85 Z28
Engine: 4.530 X 4.250 BBC
Transmission: under rated for this application
Axle/Gears: also under rated

Classifieds Rating: (13)

the tru trac makes no noise unless you break it, I`m running one with slicks and a brake with a big block, okay so far.
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Old 03-06-2007, 07:07 AM   #7
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Join Date: Jun 2002
Location: MA
Posts: 432
Car: 1982 Z-28
Engine: 383
Transmission: Turbo 350
Axle/Gears: Det. Posi, Superior Axles, 3:73 G

Classifieds Rating: (1)

True - I don't want a locker.

I looked online last night and it seems alot of 4x4's use the Detroit Tru Trac. They like it cause it can handle the abuse and torque. Also Greezemonkey is running one behind a transbrake. So it's a strong, sturdy unit that would hold up well for the street (and the occasional burnout) that doesn't make any noise. I think this is the unit that suits all my needs. Thanks everyone.
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Old 03-12-2007, 07:06 AM   #8
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Join Date: Jan 2007
Location: NewBrunswick, Canada
Posts: 149
Car: 84 TA Black/ Gold
Engine: 383 With Vortec Heads
Transmission: 700 R4 Lvl2 Performabuilt 9.5 Vert
Axle/Gears: Moser 9" with 3.70

Classifieds Rating: (2)
Quote:
Originally Posted by greezemonkey View Post
the tru trac makes no noise unless you break it, I`m running one with slicks and a brake with a big block, okay so far.
That is just what I wanted to hear. I have not heard anything bad about the truetrac. I have even talked to their tech line and they will answer any questions. I was going to beef up my 10 bolt, but after I talked to them they covinced me not to go that way. He said the truetrac is a strong differetial . Hard to break. As we know the 10 bolt is weak to start out with. I figured beef the 10 up with a truetrac. This would strengthen it. He said yes it would , but this is not the weak point of the 10 bolt rear end, and this would only make the weak point weaker. So I went with the moser 9 and now I am looking for a good thirdmember with a Truetrac.
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Old 03-12-2007, 07:06 AM
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