Some of the GM corporate HD axles are not available with that ratio - but the 1 ton truck is available with the Dana full-floating 9 3/4 and 10" axles, Chevy 10 1/2" full-floating, and also the Rockwell 12" full-floating. The Dana and Rockwells do have the 3.42 option and usually have an extra RPO code of "Y" something. All you need to do to check is get one wheel off the ground - put the trans in neutral - spin and count the turns. Look to see how far the driveshaft turns to make the wheel turn once. If the ratio is 3.42 - the driveshaft will turn about 1 3/4 turns to 1 turn of the wheel. Exception is if you have a posi and cannot turn one wheel with the other on the ground. If so, jack both up and then - for a 3.42 -the driveshaft will turn 3.42 turns to one turn of the wheels. A truck with a small-block engine and such gearing with a TH400 would have trouble getting started on steep hills with a heavy trailer behind it - unless it's 4WD with a low-range available. But, with a 454 and a matching torque-converter - it's probably not a problem with the high gearing. I've done a lot of towing with 3.08 axles against a TH400 - but have to put the transfer-case into low-range to get started up steep hills with a load.
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Today's Featured Article - My Ford Golden Jubilee - by Troy Estes. This article is about my '53 Ford Jubilee and a story that starts with taking the tractor to my brother's Starter/Alternator Rebuilding shop for a wiring fix. The generator was shot as well as all the wiring. I dropped off the tractor expecting a transformation from a 6 volt to a 12 volt system utilizing the original generator housing, and a total rewiring of the whole tractor. The front end center pin bushing was worn also so I ask that they replace it if they had time. Well, that’s wha
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