Posi and gears

[Clutch]

Will someone please refresh my memory? If I pull the stage 3 summit center out of my 87 Cutlass what's the tallest GM gear that will go on that unit it has 4.11s now I want highway gears when I put it in the 78

 

[bob64]

You can change it to a 3.08 ring and punion.

 

[Clutch]

You can change it to a 3.08 ring and punion.

That's what I thought thank you!

 

[455'ed80Regal]

I thought 3.08/3.23 was the break on the 3 series carrier? Maybe not?

 

[Clutch]

I thought 3.08/3.23 was the break on the 3 series carrier? Maybe not?

Lol that's exactly why I made this thread

 

[79 USA 1]

My understanding is 3.08 and down is a 2 series carrier, 3.23 and up is a 3 series carrier.

Hope this helps.
Bob S.

 

[Clutch]

Well I asked because I want to take out a 4.11 and put in a 3.08 and I wanted to know if they fit the same unit

 

[bob64]

With the 7.5/7.65 series 2 carrier is max 3.08, series 3 is 3.23 an up . Sorry had it in my head 8.2 series 3 carrier which will take a 3.08

 

[Clutch]

With the 7.5/7.65 series 2 carrier is max 3.08, series 3 is 3.23 an up . Sorry had it in my head 8.2 series 3 carrier which will take a 3.08

Lol wow I'm not the only one confused thanks Bob so if I have this right my 4.11 7.5 or 7.6 will not accept my 3.08 so I need a 3.23 ring and pinion??

 

[bob64]

Lol wow I'm not the only one confused thanks Bob so if I have this right my 4.11 7.5 or 7.6 will not accept my 3.08 so I need a 3.23 ring and pinion??

Correct you need 3.23 or higher.