The Stovebolt Site Forums The Parking Lot Big Bolts 48 one ton suburban rear end change

Help is a click away!

VEHICLE
INFORMATION
KITS

at the

GM Heritage Center
All the details are here.

Searching the Site - a click away

New here ??? Where to start?

Click on image for the lowdown.

====

Who's Online Now

1 members (2-Ton), 141 guests, and 2 robots.

Key: Admin, Global Mod, Mod

Forum Statistics

Forums66

Topics128,162

Posts1,056,941

Members48,458

Most Online14,466
Apr 26th, 2026

Step-by-step instructions for pictures in the forums

Brad Allen's photos

AD Chevy Trucks

Pictures galore

Over 6,000 pictures

Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips.

Check them out!

Lots of work on Brad's part ... pure enjoyment (and references) for you!

Big Thanks!

THANKS!

For helping keep this great
old truck web site
on the Internet for

over 30 years!

and not clogged down
with Ads!

Again, thanks!

Print Thread

48 one ton suburban rear end change #747265 05/15/2011 9:37 PM
Joined: Nov 2010 Posts: 12 canada O oldambulance New Guy
oldambulance New Guy O Joined: Nov 2010 Posts: 12 canada	I have a 48 one ton and I would like to change the gear ratio so I can drive highway speeds, any suggestions or hints?? It's an ex-ambulance with low mileage but I will be upgrading to a 261 later on. Your help is appreciated, http://profile.imageshack.us/user/fraser88/

Re: 48 one ton suburban rear end change oldambulance #747336 05/16/2011 12:24 AM
Joined: Apr 2005 Posts: 396 Near Sleepy Eye Minnesota 1 1951Chevy1Ton Shop Shark
1951Chevy1Ton Shop Shark 1 Joined: Apr 2005 Posts: 396 Near Sleepy Eye Minnesota	HO52/72 4.11 gearset from a 1967-1972 chevy 3/4 -1 ton, auto trans will get you to 65 MPH. Jerry

Re: 48 one ton suburban rear end change 1951Chevy1Ton #747357 05/16/2011 1:18 AM
Joined: Mar 2002 Posts: 9,115 Bracebridge Ontario Canada truckernix 'Bolter
truckernix 'Bolter Joined: Mar 2002 Posts: 9,115 Bracebridge Ontario Canada	The most common fix is to install the "pumplin" from a 1967 to 72 3/4 Ton truck with an automatic. They had a ratio of 4:10. I did this swap and I can drive at 60 mph with no problem. I also have tall 16" tires on mine. Here is a writeup on the procedure: Old GMC.com Site Article 1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it! 1951 1 Ton Completed My Chevy Master 4 Door is on the Road!

Re: 48 one ton suburban rear end change truckernix #747456 05/16/2011 6:48 AM
Joined: Nov 2010 Posts: 12 canada O oldambulance New Guy
oldambulance New Guy O Joined: Nov 2010 Posts: 12 canada	Thanks for your help, I'll track down a 67 to 72,,,

Moderated by 69Cuda, Super55

Hop To

Link Copied to Clipboard