Aftermarket Auburn vs Factory Auburn

01-19-2019, 04:34 PM

Junior Member

Thread Starter

Join Date: Jan 2019

Location: Prince George, BC

Posts: 8

Car: 1986 IROC-Z

Engine: 305 LG4 Carbed

Transmission: T5 5-Speed

Axle/Gears: 7.5 10-Bolt 3.42

Aftermarket Auburn vs Factory Auburn

How similar is a new Auburn HP series to the Auburn limited slip that originally came in a 1986 IROC-Z? Similar casting? Internals?

01-19-2019, 06:21 PM

sofakingdom

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Join Date: Sep 2005

Posts: 21,052

Car: Yes

Engine: Usually

Transmission: Sometimes

Axle/Gears: Behind me somewhere

Re: Aftermarket Auburn vs Factory Auburn

They are essentially the same. There are detail differences but not much. They revise their product often; within acoupla years, no parts interchange. Never really gets any "better", sometimes gets ALOT worse; but nothing fits anymore

The "high-perf" one has more springs on the clutches.

I'm not a fan of that company. AT ALL.

01-19-2019, 10:21 PM

HeavyOlds

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Thread Starter

Join Date: Jan 2019

Location: Prince George, BC

Posts: 8

Car: 1986 IROC-Z

Engine: 305 LG4 Carbed

Transmission: T5 5-Speed

Axle/Gears: 7.5 10-Bolt 3.42

Re: Aftermarket Auburn vs Factory Auburn

So I ended up getting one from JEGS. $40 off at the moment plus a $30 coupon code. Total was like $327.00. I’d rather have a Torsen or Truetrac but this will keep it close to factory for way less.

01-19-2019, 10:31 PM

big gear head

Supreme Member

Join Date: Sep 2008

Posts: 3,746

Re: Aftermarket Auburn vs Factory Auburn

If you drive it like most mature people drive then it will last pretty well. If you drive it like someone normally drives a hot rod then it won't last a long time. You will need to add a lot of limited slip oil additive to it to keep it from chattering. It usually takes 2 bottles of the Ford LSD additive to get it somewhat quiet.