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| | | | Joined: Nov 2008 Posts: 49 New Guy | | New Guy Joined: Nov 2008 Posts: 49 | I have a 350 chevy motor with a 350 tranny, I have a 3:42 rear end from an S 10 blazer 4 wheel drive.Going to put it in a 40 1/2 ton pick up.What can I expect? I want to cruse at todays speeds, no hauling, just drive where I want and not be bogged down as I am now with the original rear end and tranny. Also I am converting the front to a mustang 2 ifs.
Last edited by derry; 02/17/2009 3:10 AM.
| | | | | Joined: Oct 2003 Posts: 5,152 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Oct 2003 Posts: 5,152 | With the tire size you can calculate how fast the motor will be turning at any given speed at a number of places on the web.
With those gears in a light truck I'd expect pretty spritely performance but going any distance on the highway you'll have lots of engine noise and burn more fuel than with on overdrive.
You'd have no trouble going any legal speed in this country. 30 years ago a combination very similar to that would have been common in factory trucks which still perform well in use today.
1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble... | | | | | Joined: Nov 2008 Posts: 137 Shop Shark | | Shop Shark Joined: Nov 2008 Posts: 137 | derry
You will be fine. Those are decent gears. Good for the highway and also good for the kick in the pants on the street. I run a 3:73 posi in a 4spd Camaro. It winds up pretty quick but I run it on the highway for 10-20 mile distances. | | | | | Joined: Feb 2000 Posts: 5,237 'Bolter | | 'Bolter Joined: Feb 2000 Posts: 5,237 | I ran those gears with same trans and a 250 for years. Tires were 28" tall 235/75R15. RPM was around 2700 2800 at highway speeds. Joe | | | | | Joined: Nov 2008 Posts: 49 New Guy | | New Guy Joined: Nov 2008 Posts: 49 | Is this rear end swap a bolt on , or is there welding and cutting to do? | | |
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