73-77 A-body TECH Includes 73GTO, LeMans, Grand Am, Can Am

          
 
 
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Old 04-22-2013, 01:13 AM
Grand73Am Grand73Am is offline
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Join Date: Feb 2004
Location: Lawrenceville, GA
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Actually, the 2.73's and up use the 3 series carrier.

2.56 and 2.41 uses a 2 series carrier. So, no you can't use 2.73's or higher number gear ratios in the 2 series carrier without a spacer. But, a lot of people don't trust spacers. Using a 3 series carrier for 3 series gears is preferred.

But, my 75 Pontiac Service manual shows that 2.73, 2.93, and 3.08 gears were also available in the 75 a-body, so they didn't only have a 2.56. So, if you're not sure what it has, you might have a 3 series carrier if you look closer at it.

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