I HAVE A 9 BOLT WITH 2'77 POSI I WANT TO CHANGE THE GEARS BUT MY MECHANIC SAYS THAT THE 9 BOLT REAR WIL BRAKE. HE SUGGESTED THAT I CHANGE IT TO A 10 BOLT WITH 3'42.

 

Search this forum, the 9-bolt vs 10-bolt discussion is all over. For the record, the 9-bolt is stronger than the 10-bolt, but since you have 2.77's, finding gears and a posi for it are tougher.

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West Coast GM Shootout 2001!
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
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yea the 9 bolt is stronger but you havce a better selection of gears for a 10 bolt,

 

wrong you can get anything from 2.7,s to 4.11,s
so that isnt an argument anymore

 

give me some info i have a 9 bolt with 2;77 posi i want to change my gears to 3;45 posi they say i have to get them in australia; if anyone knows any info on a phone number or company that sells a 3;45 posi let me no.

thanks nun

 

I'll have some in a few weeks. What do you want?

Miles

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88 427 Camaro
12.18 @ 113mph 1.75 60ft
Currently installing 3.73's into my 9 bolt (YES,it is a 9 bolt & YES they are 3.73's, not 3.70. 4.11's to follow soon )
www.koolmeister.com