Author Topic: 1968 10 Bolt rearend upgrade  (Read 1879 times)

kmiller

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1968 10 Bolt rearend upgrade
« 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!

KevinW

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Re: 1968 10 Bolt rearend upgrade
« Reply #1 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!

bcmiller

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Re: 1968 10 Bolt rearend upgrade
« Reply #2 on: December 24, 2023, 04:26:51 PM »
Suggestion. Add the Posi and go with 3.36 gear. Itís a compromise. 3.73 wonít be good for gas mileage and itís 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.
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David K

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Re: 1968 10 Bolt rearend upgrade
« Reply #3 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 endsÖ.

GMAD_Van Nuys

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Re: 1968 10 Bolt rearend upgrade
« Reply #4 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.

Kelley W King

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Re: 1968 10 Bolt rearend upgrade
« Reply #5 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.
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