73 ford truck
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Junior User
Joined: Jul 2004
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Temp for diff gear
one of my friends recently bought a 73 ford f100 sb pick up.my question is does any one know what kind of gears it came with?? it originally came with a 1-6 he already dropped in a 5.0 and a 5 speed out of a 93 mustang it rides real nice!!! but would like some more performance out of it.it seems to have the ford 9 inch.correct me if im wrong.before buying gears and posi does any one know what it came with stock?much help appreciated!!!!!!!!!!!!!!
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Joined: May 2002
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From: Gatlinburg
I'll bet the Stang motor and the 5 speed is nice in the ole truck. I'm not real knowledgeable about 9" Ford rearends since my Highboy is a Dana 60 but, if it don't have a cover and bolts on the rear of it then it's probably a 9" Ford which the whole chunk (3rd member) will pull out the front.One way that you can get a pretty good ballpark figure on what the rearend ratio is, is to mark the drive shaft at a certain point ( and also, one of the rear tires). Say with the valve stem up or down. Roll the tire around one complete revolution and count how many times the driveshaft turns.
Say for instance, the driveshaft turns 2 3/4 turns, then it might be like a 2.73 to 1 or close to that. If it turns 3 1/2 turns, then it might be in the 3.50 to 1 range. By doing this, you can easily at least get an idea of what your ratio is close to without having to pull it apart.
There's probably other folks on this forum that could coach you better about 9" Ford rearends and what to look for. Tell your friend not to make to many of the Mustang guys feel bad by out running them in the Ole Hammer Truck!! Ha Ha.
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Joined: Aug 2002
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From: clementsport canada
30 over, you made one tiny mistake. if he's only gonna turn one tire, it has to be turned 2 times (alows for going through the spider gears)
what i do, is jack one tire up, mark it, then mark the d-shaft. now one person turns the one rear tire 20 times, and the other person counts the d-shaft rotations. then divide by 10. if you cound 35, then you have 3.50 gears..
doing it that way will let you tell the difference between 3.00, and 3.10 gears
what i do, is jack one tire up, mark it, then mark the d-shaft. now one person turns the one rear tire 20 times, and the other person counts the d-shaft rotations. then divide by 10. if you cound 35, then you have 3.50 gears..
doing it that way will let you tell the difference between 3.00, and 3.10 gears
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Joined: May 2002
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From: Gatlinburg
Originally Posted by theonlybull
30 over, you made one tiny mistake. if he's only gonna turn one tire, it has to be turned 2 times (alows for going through the spider gears)
what i do, is jack one tire up, mark it, then mark the d-shaft. now one person turns the one rear tire 20 times, and the other person counts the d-shaft rotations. then divide by 10. if you cound 35, then you have 3.50 gears..
doing it that way will let you tell the difference between 3.00, and 3.10 gears
what i do, is jack one tire up, mark it, then mark the d-shaft. now one person turns the one rear tire 20 times, and the other person counts the d-shaft rotations. then divide by 10. if you cound 35, then you have 3.50 gears..
doing it that way will let you tell the difference between 3.00, and 3.10 gears
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Joined: Aug 2002
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From: clementsport canada
thanks guys, it's a method that's worked well for me, i spent a good many afternoons looking for a set of 3.50 gears that way. the wife counted the d-shaft for me, and it worked well...
go ahead torque1st , credit doesn't matter to me, just hope it helps someone
go ahead torque1st , credit doesn't matter to me, just hope it helps someone
