Rear end question
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Elder User
Joined: Feb 2003
Posts: 871
Likes: 0
From: Coleman, Wisconsin
Rear end question
The axle code on the door is H3. But according to the Chilton's manual I have, they never had a H3 axel in a f100 in '81. Also, the tag bolted to the rear end says it has 2.75 gears, but the manual also says that they never put those gears in a f100, ever. Right now I have a mystery rear end and could use some help identifying it.....Thanks
Post Fiend
Joined: Nov 2002
Posts: 9,987
Likes: 7
From: Memphis, TN
Rear end question
You have all the info there - either the books are wrong, or the axle was swapped in. There's only one way to find out for sure: pull the rear cover off & read what's stamped into the edge of the ring gear.
Elder User
Joined: Dec 2002
Posts: 550
Likes: 1
From: Effingham,IL USA
Rear end question
somebody might have changed out the rearend 3rd member. if i want to check ratio i jack up one wheel, mark the driveshaft and rearend with chalk and , mark the wheel thats jacked up, turn the wheel one time exactly and see how many times the driveshaft turned. how many times you turned the driveshaft is the ratio.
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Elder User
Joined: Feb 2003
Posts: 871
Likes: 0
From: Coleman, Wisconsin
Rear end question
Is it a possibility that the guys at Public Service specially ordered their trucks with that rear end in it? even though it wasn't available to the public?
Junior User
Joined: Oct 2002
Posts: 64
Likes: 0
Rear end question
I agree with 82F100SWB. Call a Ford dealership to confirm the code. When I did this way back when (might have been a different code), the Ford dealership said that the Chilton's was wrong. My 82 F100 has 2 75 on the tag, don't recall off hand what the code on the door says.
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Junior User
Joined: Aug 2002
Posts: 56
Likes: 0
From: Wasilla,Alaska
Rear end question
I beg to differ with that manual. I had a '79 F-100 with a 2.75 rear. Came with a 302 and c-4 automatic. It had the explorer package (stripe kit, hood ornament, tilt wheel, int.wipes). It was really light duty but a sharp looking truck.
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