Going from a 2.76 gear to a 3.08 - worth it?

ULTM8Z

Veteran Member
May 19, 2000
10,713
Los Angeles
You might consider going to a 3.23 if you want a bigger improvement. I'm assuming you're trying to maintain good highway manners...
 

450bench

Veteran Member
Feb 25, 2002
3,710
memphis, tn-shelby
Yeah, I am trying to keep Highway manners doable.

I don’t know about it being a factory gear. I just spun the tire jacked up and the drive shaft turned 2 3/4 turns. Runs about 2500 at 70 mph.
 

1980RS

Veteran Member
Jun 17, 2006
6,546
MN
Curious if the change is worth it.
Cruiser, weekend car. 454 and th350 2000-2200 converter.
Yes it will make a world of difference. In 1979 I had a Chevelle that was running 2.56 peg leg gears and always though the car was a dog but it went well form a 40mph punch. After I figured out it had Nascar gearing lol I found a free 3.31 12 bolt posi rear end which I and a friend installed on night where I used to work at. We raced going to the shop where I beat him by 1 car length, after the swap it was ugly and he got beat by over 6 car lengths, so Yes it will make a difference. 3.08 are a great gear for all around performance but the best gear is still IMO a 3.55 gear.
 

badazz81z28

Veteran Member
May 4, 2001
22,306
Alabama
2.76 to a 3.08…no. I don’t think it’s worth it. If you went a little deeper…say 3.23, 3.42 or even 3.73…oh yea.
 

ULTM8Z

Veteran Member
May 19, 2000
10,713
Los Angeles
For highway manners, 3.42 is probably pushing the limit. I'd probably err in the side of 3.23. Otherwise you'll probably want an OD transmission
 

1978 Z/28

Veteran Member
Jul 17, 2017
595
New Brunswick
I would go to 3.42s, going from 2.76s to 3.08s not worth it. I have 3.42s now and like them engine is a 385. My camaro came with 3.73s nice gear at 60 mph with stock tires engine reved about 3000, with 3.73s double rpm drop to zeros and that is the rough mph.
 




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