3:73s

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04-09-2010 | 10:36 PM

localman72

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Joined: Feb 2010

Posts: 18

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From: niles mi

Car: 1986 iroc-z

Engine: LG4 305

Transmission: 700R4

Axle/Gears: 273

3:73s

are the axles the same for 273s 373s for a 7.5 i want to put 373s in my car do i need to change the axles to.

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04-10-2010 | 06:17 AM

JamesC

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Joined: Aug 1999

Posts: 19,282

Likes: 97

From: Lawrence, KS

Car: Met. Silver 85 IROC/Sold

Engine: 350 HO Deluxe (350ci/330hp)

Transmission: T-5 (Non-WC)

Axle/Gears: Limited Slip 3.23's

Re: 3:73s

Quote:

Originally Posted by localman72

are the axles the same for 273s 373s for a 7.5 i want to put 373s in my car do i need to change the axles to.

In 86, the splines were all the same, 26, for a 10-bolt. More info following:

https://www.thirdgen.org/forums/tran...-10-bolts.html

JamesC

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04-10-2010 | 07:29 AM

DJP87Z28

Supreme Member

Joined: Mar 2003

Posts: 4,771

Likes: 14

From: Florida

Car: 1987 Black IROC-Z (SOLD)

Re: 3:73s

Quote:

Originally Posted by localman72

are the axles the same for 273s 373s for a 7.5 i want to put 373s in my car do i need to change the axles to.

With the above statement, you are heading for big Problems. The big one is the 2 & 3 series carrier problem. I hope this is not a DIY project???

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04-10-2010 | 09:03 AM

big gear head

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Joined: Sep 2008

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Re: 3:73s

You don't need to change the axles. The 2.73 uses a 2 series differetnial and the 3.73 uses a 3 series. You need to swap to a 3 series differential or get a special thick gear that is made for the 2 series.

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04-10-2010 | 09:30 AM

localman72

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Joined: Feb 2010

Posts: 18

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From: niles mi

Car: 1986 iroc-z

Engine: LG4 305

Transmission: 700R4

Axle/Gears: 273

Re: 3:73s

Please click one of the Quick Reply icons in the posts above to activate Quick Reply.

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04-10-2010 | 09:50 AM

big gear head

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Re: 3:73s

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