Gear ratio question
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Gear ratio question
I have a 65 f-100 with a 302 with a mild cam. The truck has a 5 spd out of a 95 f-150 I-6. I have the rearend out of the truck the trans came out of and i want to put it in the truck. The tag on the rearend has S842A
73 88 1A09
Can someone tell me the ratio of this rearend?
Also has anyone had this setup are close to it and how did it work? I will pull a car trailer now and then and i would like to know if it will do the job?
Thanks for any help you can give.
73 88 1A09
Can someone tell me the ratio of this rearend?
Also has anyone had this setup are close to it and how did it work? I will pull a car trailer now and then and i would like to know if it will do the job?
Thanks for any help you can give.
Elder User
Joined: Jun 2012
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From: 7th realm of hell, Va.
It looks like you are missing a digit, but from what you posted it looks like a 3.73 gear with an 8.8 inch ring gear made in 1991?? january 9th
I found this using google
Differential Identification | West Coast Differentials
You should do o.k. towing with that combo
matt
I found this using google
Differential Identification | West Coast Differentials
You should do o.k. towing with that combo
matt
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checked the tag this morning and their is a 2 next to the bolt which makes it a 2.73 ratio. So with my 302 how will it be suited for pulling a car trailer now and then. I looked on the west coast site and it stated small block should turn 1800, to 2800 rpms at highway speed. so is highway speed 55, 60,65or70 mph. The site said 2.73 with 235-75-r15 at 70mph it will turn about 1779 rpms. What do ya'll think?
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Fleet Owner
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From: Kentucky
No way would I ever consider a 2.73 gear ratio in any truck. 3.55 or better is my recommendation. Why Ford ever put such a tall gear in a truck is beyond me.
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This should say it all, the factory tow rating for an I6 truck with manual trans and 2.73 gears was ZERO. Go find yourself a 3.55LS axle.. it was very common in 5.0 and 5.8 1/2 ton trucks.
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From: southwest michigan
The 3.55 with bring that up to 3600.
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Ok we not putting the 2.73 rear in the truck. Now, the tag on the stock rear reads BG-f2 3.89 3MG 301. I think this tells me its a 3.89 ratio rear which should pull my trailer fine. So if i rebuild my stock 9" rear with the 3.89 i would like to get another chunk and put some taller gears for when i'am around home in south louisiana (flat) and not pulling are carrying a load. Would 2.73 be ok with my 302 mild cam 5 spd?
Fleet Owner
Joined: Oct 2005
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From: Kentucky
Ok we not putting the 2.73 rear in the truck. Now, the tag on the stock rear reads BG-f2 3.89 3MG 301. I think this tells me its a 3.89 ratio rear which should pull my trailer fine. So if i rebuild my stock 9" rear with the 3.89 i would like to get another chunk and put some taller gears for when i'am around home in south louisiana (flat) and not pulling are carrying a load. Would 2.73 be ok with my 302 mild cam 5 spd?
That 302 needs RPM to build some torque. Add in a "mild cam" now your power curve is shifted to the right versus a stock 302. That means it may makes less torque for the same RPM in the lower RPM range. Stick to the 3.89 geared 9" and call it day.
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