CRG Discussion Forum

Camaro Research Group Discussion => Mild Modifications => Topic started by: kmiller on December 24, 2023, 04:57:33 AM

Title: 1968 10 Bolt rearend upgrade
Post by: kmiller on December 24, 2023, 04:57:33 AM
I have a 1968 Convertible that was a base with 210 HP and 2:73:1 gears with a Power Glide.  I am in the process of upgrading  and would like to convert the rear end to a lower gear (3:55 or 3:73) with posi traction. Is there a kit to make this change easily? If so, does anyone have a pointer? If not, any suggestions on making this change? Thanks!
Title: Re: 1968 10 Bolt rearend upgrade
Post by: KevinW on December 24, 2023, 02:22:56 PM
I had a shop rebuild mine and added 3.55s, but next time I want to try it myself.  With 3.55s the power glide is better.  But I replaced the PG with a 200r4, but I wished I would have went with 3.73s with the 200r4 (if still avail?) Luck!
Title: Re: 1968 10 Bolt rearend upgrade
Post by: bcmiller on December 24, 2023, 04:26:51 PM
Suggestion. Add the Posi and go with 3.36 gear. It’s a compromise. 3.73 won’t be good for gas mileage and it’s a big change from what you have.

The rear end will need to be taken all apart for the change. There are a few specialty tools needed.
Title: Re: 1968 10 Bolt rearend upgrade
Post by: David K on December 24, 2023, 05:01:27 PM
The parts to do this are readily available, but I would recommend a shop that has the tools to do it. If GM had only gone the Ford way for rear ends….
Title: Re: 1968 10 Bolt rearend upgrade
Post by: GMAD_Van Nuys on December 24, 2023, 06:24:50 PM
You can get an idea of what gear ratio is best suited for your Camaro if you replace your present tires with low-profile wheels if you have some available.
Title: Re: 1968 10 Bolt rearend upgrade
Post by: Kelley W King on March 09, 2024, 01:52:40 AM
I think the 3.36 might be best also. Especially if you are leaving the 210hp stock.