Gearing/Tire Size Question
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From: Olathe
Gearing/Tire Size Question
Recently I found a Dana 50 from a '99 on Craigslist for $200. Couldn't pass it up. I've got misc rebuild parts on the way. Supposedly, it's a 3.73:1. I understand gear ratio vs tire size on the F250. What if I put the D50 on a compact or midsize with 35s? Being that a Dana 50 from a 7.3 diesel is way overkill, do I really need to change the gears? Keep in mind it was only $200 so don't bother to tell me it's crap and I should have bought a 60. But please help and I'll greatly appreciate it. Thanks.
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From: Olathe
Perhaps I don't understand gearing properly. But I've read on here that a 3.73 is good for 5k lbs, 425-525 ft/lbs. With that in mind, why couldn't it support a 351 on a smaller rig with 35s? Maybe what I read was wrong.
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You are not providing all the variables. OEM tow ratings are, in part, based on ratios. Since this is a transplant with tires not found on the OEM vehicle (I guess....) no cross reference applies. Ditto torque capacity. If you put a 2.32 toploader 4 speed in front of 3.73s you are going to feed it a lot less torque than if put a near 7:1 granny in front of it.
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From: Olathe
That was my thought too. Thank you for a helpful response!
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