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  • 1965 - 1973 Classic Mustangs -General/Talk-

66 Posi Unit

  • Thread starter Thread starter sdsteve619
  • Start date Start date Mar 5, 2015
S

sdsteve619

Member
May 16, 2011
43
0
7
Orem, Utah
Mar 5, 2015
#1
  • Mar 5, 2015
  • #1
I'm wondering which pois would be best for my 66...Auburn pro series or Detroit truetrac....Summit thinks its the Detroit....also are Yukon gears are the most quite....any thoughts.
 

rbohm

Founding Member
Apr 12, 2002
6,698
550
204
tucson,az
Mar 5, 2015
#2
  • Mar 5, 2015
  • #2
what are you going to be doing with the 66? drag racing? circle track? street driving? autocross?
 
N

n8rfastback

Member
May 28, 2014
135
7
18
Mar 5, 2015
#3
  • Mar 5, 2015
  • #3
I just put a powertrax locker in my 8". I figured if I'm going to spend $500 I may as well get the benefits of full torque at both wheels rather than a LSD. And I don't mind the ratcheting sounds at all.
 
S

sdsteve619

Member
May 16, 2011
43
0
7
Orem, Utah
Mar 6, 2015
#4
  • Mar 6, 2015
  • #4
n8rfastback said:
I just put a powertrax locker in my 8". I figured if I'm going to spend $500 I may as well get the benefits of full torque at both wheels rather than a LSD. And I don't mind the ratcheting sounds at all.
Click to expand...
Daily driver...has 331-5speed...performer rpm heads...comp cam...rpm intake...650cfn carter...used for drives up and down canyon roads..
 
N

n8rfastback

Member
May 28, 2014
135
7
18
Mar 6, 2015
#5
  • Mar 6, 2015
  • #5
The powertrax lockers unlock when you make turns and lock up when you give it throttle.
 

rbohm

Founding Member
Apr 12, 2002
6,698
550
204
tucson,az
Mar 7, 2015
#6
  • Mar 7, 2015
  • #6
sdsteve619 said:
Daily driver...has 331-5speed...performer rpm heads...comp cam...rpm intake...650cfn carter...used for drives up and down canyon roads..
Click to expand...

ok. for this application i would NOT use the detroit locker. it tends to be rather loud, and it takes time to get used to hearing ti lock and unlock.

the powertrax locker is much better as is the auburn unit. when i get to building my mustang again, i will use the powertrax locker.
 
N

n8rfastback

Member
May 28, 2014
135
7
18
Mar 7, 2015
#7
  • Mar 7, 2015
  • #7
I read a lot of reviews about the powertrax units being loud as well, but I think it was mostly the older variations of it. The newer ones have springs that reduce backlash noise and harshness that the old ones were known for.
 

7991LXnSHO

wanna catch the space herp
10 Year Member
Sep 1, 2010
7,387
2,745
194
Kearney, NE
Mar 8, 2015
#8
  • Mar 8, 2015
  • #8
You want something that is smooth and unnoticeable except for extra traction. That means a clutch type (Eaton or stick type Limited slip) or helical gear (Detroit True trac). What is the price difference for your differential?
 
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