What Spline do i have in my 87 iroc

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Apr 10, 2001 | 03:16 PM

Anth's Iroc

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Senior Member

Joined: Jan 2000

Posts: 539

Likes: 1

From: Upstate NY

Car: 87 IROC-Z

Engine: =350 sbc

Transmission: TH350

Axle/Gears: 3.73

What Spline do i have in my 87 iroc

Hey guys need a little help here.my rear end dumped today and i need to order aposi unit for my car but i dont know what spline is in it(26 or 28)My car is a 1987 irocz 305 lg4
and right now it has a 2.73 open rear end(well use to)......
Thanks
Tony

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1987 BLUE IROC
IT'S A DOG
BUT IT'S MY DOG
AND IT HAS A NASTY BITE......
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Apr 11, 2001 | 12:46 AM

Kevin91Z

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iTrader: (1)

Joined: Jul 1999

Posts: 10,950

Likes: 26

From: Orange, SoCal

Car: 1990 Pontiac Trans Am

Engine: 355 TPI siamesed runners

Transmission: Tremec T56

Axle/Gears: 12-Bolt 3.73

26 spline. 28 spline rear ends werent until the 1990+ 10-bolt.

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