The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1947 - 1959 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 03-26-2011, 09:44 AM   #1
Birdman6165
Registered User
 
Birdman6165's Avatar
 
Join Date: Mar 2011
Location: Richland, WA
Posts: 13
2.73 Rear end for a 57' Chevy Truck??

Greetings all; I need your advice. I have my truck at the shop getting the suspension updated and the mechanic is telling me I will have enough get up and go with an open 2.73 rear end. I know the highway driving will be good, but will I still have some pep off the line?

Truck information:
Pontiac 400 with over 300 hp (mild cam, intake manifold, headers, holley)
TH 400 Transmission (Which I will keep)
Birdman6165 is offline   Reply With Quote
Old 03-26-2011, 09:54 AM   #2
blackdiesel
Registered User
 
blackdiesel's Avatar
 
Join Date: Jan 2009
Location: Omaha, Arkansas
Posts: 905
Re: 2.73 Rear end for a 57' Chevy Truck??

grandpas truck has 2.73 in it and a LT1 motor and it's a dog off the line, it don't start running good till 60 MPH
__________________
'57 Chevy Pickup
'56 GMC LCF Cummins
'38 Chrysler Royal
'57 2wd change
http://67-72chevytrucks.com/vboard/s...light=speedway
blackdiesel is offline   Reply With Quote
Old 03-26-2011, 10:22 AM   #3
Birdman6165
Registered User
 
Birdman6165's Avatar
 
Join Date: Mar 2011
Location: Richland, WA
Posts: 13
Re: 2.73 Rear end for a 57' Chevy Truck??

What would you recomend based on my set up?
Birdman6165 is offline   Reply With Quote
Old 03-26-2011, 11:48 AM   #4
blackdiesel
Registered User
 
blackdiesel's Avatar
 
Join Date: Jan 2009
Location: Omaha, Arkansas
Posts: 905
Re: 2.73 Rear end for a 57' Chevy Truck??

3.08 or 3.23 if your going to be doing 65 + driving or 3.42's if under 65.
__________________
'57 Chevy Pickup
'56 GMC LCF Cummins
'38 Chrysler Royal
'57 2wd change
http://67-72chevytrucks.com/vboard/s...light=speedway
blackdiesel is offline   Reply With Quote
Old 03-26-2011, 11:54 AM   #5
skip99
Registered User
 
skip99's Avatar
 
Join Date: Oct 2010
Location: mt vernon, oh
Posts: 480
Re: 2.73 Rear end for a 57' Chevy Truck??

I just bought a 3.42 posi set for our 51...she wants to burn a little rubber! not a lot of distance driving,
skip99 is offline   Reply With Quote
Old 03-26-2011, 12:04 PM   #6
Birdman6165
Registered User
 
Birdman6165's Avatar
 
Join Date: Mar 2011
Location: Richland, WA
Posts: 13
Re: 2.73 Rear end for a 57' Chevy Truck??

I really appreciate the feedback. Here's my rig.
Attached Images
 

Last edited by Birdman6165; 03-26-2011 at 12:05 PM.
Birdman6165 is offline   Reply With Quote
Old 03-26-2011, 12:17 PM   #7
Average Joe
Registered User
 
Average Joe's Avatar
 
Join Date: Feb 2009
Location: Southern Oregon
Posts: 407
Re: 2.73 Rear end for a 57' Chevy Truck??

Mild Pontiac 400=big torque @ low Rpm. Fantastic truck motor. Those 2.73 ought to be great on the highway. Beautiful truck BTW. Keep us posted how this turns out.
Average Joe is offline   Reply With Quote
Old 03-26-2011, 01:09 PM   #8
Birdman6165
Registered User
 
Birdman6165's Avatar
 
Join Date: Mar 2011
Location: Richland, WA
Posts: 13
Re: 2.73 Rear end for a 57' Chevy Truck??

Thanks Joe! The low end torque is what concerned me. I have a crane cam
(105072) in it and was told it would also assist with the low end torque. I just don't want to hit the gas from a stand still and have it respond like a gutless pig.
Birdman6165 is offline   Reply With Quote
Old 03-27-2011, 11:03 AM   #9
Birdman6165
Registered User
 
Birdman6165's Avatar
 
Join Date: Mar 2011
Location: Richland, WA
Posts: 13
Re: 2.73 Rear end for a 57' Chevy Truck??

Thanks for the great advice guys. Since I'm staying with the TH400, I'll look for a rear end with 3.08-3.42.
Birdman6165 is offline   Reply With Quote
Old 03-27-2011, 06:26 PM   #10
Trucknut57
Registered User
 
Trucknut57's Avatar
 
Join Date: Aug 2010
Location: Sand Springs, OK
Posts: 133
Re: 2.73 Rear end for a 57' Chevy Truck??

I have a 72 Camaro rear end in my 57' with an open 2.73, a bone stock 350 cu. in. motor, a quadrajet carb, and a th350 trans. When I stomp on the gas it still spins the tires into 2nd gear.

The best part is when I'm cruising down the highway at 70 mph the engine is only turning around 2600 rpm. So it saves me on the gas bill.
__________________
"Submariners are a special brotherhood, either all come to the surface or no one does. On a submarine, the phrase all for one and one for all is not just a slogan, but reality.
Trucknut57 is offline   Reply With Quote
Old 03-27-2011, 08:43 PM   #11
mr48chev
Registered User
 
mr48chev's Avatar
 
Join Date: Jul 2007
Location: Toppenish, WA
Posts: 5,865
Re: 2.73 Rear end for a 57' Chevy Truck??

It won't hurt a lick to drive it first and see how it does. And if it does what you want it to do. It's already under the truck, drive it for a couple thousand miles and see how you feel then and decide then.

It's your choice though. the possibility of a few more miles per gallon on road trips to truck events and easy freeway cruising or a bit more poke off the line once in a while and a few mpg less all around. At close to 4 bucks a gallon I'd want to know if I could be happy with the highway gears it has now. Don't let people talk you into something until you have tried what you have now.
mr48chev is offline   Reply With Quote
Old 03-27-2011, 10:34 PM   #12
blackdiesel
Registered User
 
blackdiesel's Avatar
 
Join Date: Jan 2009
Location: Omaha, Arkansas
Posts: 905
Re: 2.73 Rear end for a 57' Chevy Truck??

http://www.wallaceracing.com/gear-speed.php here's a cool little tool to help you figure MPH/RPM
__________________
'57 Chevy Pickup
'56 GMC LCF Cummins
'38 Chrysler Royal
'57 2wd change
http://67-72chevytrucks.com/vboard/s...light=speedway
blackdiesel is offline   Reply With Quote
Old 03-27-2011, 11:02 PM   #13
tmoble
Registered User
 
Join Date: Feb 2009
Location: Glendale, Az
Posts: 432
Re: 2.73 Rear end for a 57' Chevy Truck??

run the 2.73 for awhile. I think you'll be ok with it.
tmoble is offline   Reply With Quote
Old 03-28-2011, 08:05 AM   #14
Russell Ashley
Senior Member
 
Russell Ashley's Avatar
 
Join Date: May 2010
Location: Lawrenceville, Ga
Posts: 1,358
Re: 2.73 Rear end for a 57' Chevy Truck??

I have a 2:73 in my truck with a three-on-the-tree and 350. Fortunately I have a Muncie transmission with a low first gear so it isn't too bad, and the gas mileage is good. I would think your combo would be OK. I definitely would drive it for a while and see how it works for you.
Russell Ashley is offline   Reply With Quote
Old 03-28-2011, 10:34 AM   #15
Birdman6165
Registered User
 
Birdman6165's Avatar
 
Join Date: Mar 2011
Location: Richland, WA
Posts: 13
Re: 2.73 Rear end for a 57' Chevy Truck??

This is great advice gentlemen! I think I will actually try the high gears since I bought the axle for $100 from another soldier who was deploying. Hearing real experiences from those who have been there and done that helps. I'm a novice and realize I should have done all the mechanical before paint etc. I wish I had thought to look for a site like this earlier.
While I want some get up and go for passing and all around fun, good cruising and gas mileage is big positive. Thanks again!
Birdman6165 is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 07:08 AM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright 1997-2013 67-72chevytrucks.com