axle?
Mountain Pass
Joined: Mar 2002
Posts: 144
Likes: 0
From: Sandy USA
axle?
603903-1
1978-1/2 F-100(4x2 1/2 ton pick-up) Dana 44 rear axle
2.72 gear ratio
Sorry missed your post earlier if you need any more dana codes broke down e-mail me
Good Luck
John Workman
76 F250 Crew Cab Short Bed
4x4 460 C6 Dana 60 F/R
Jsworkman@mybluelight.com
1978-1/2 F-100(4x2 1/2 ton pick-up) Dana 44 rear axle
2.72 gear ratio
Sorry missed your post earlier if you need any more dana codes broke down e-mail me
Good Luck
John Workman
76 F250 Crew Cab Short Bed
4x4 460 C6 Dana 60 F/R
Jsworkman@mybluelight.com
Freshman User
Joined: Apr 2002
Posts: 48
Likes: 0
From: San Antonio USA
axle?
You said: "the driveshaft turns 1 and a quarter turn per tire rotation. The axle is limited slip. What does the 1 and a quarter turn mean? "
That can't be right. That would be a 1.25 ratio. Way too tall! For this method to work both wheels must turn the same distance. Not hard for a locker or a posi but it is difficult to do with an open diff. I suspect the other wheel spun backwards some when you turned one wheel. If you have an open diff leave one wheel on the ground while turning the other. It is easier to turn the driveshaft for one rotation of the wheel. Double the number of times you have to turn the pinion yoke for one wheel rotation. That is your ratio. Common ratios are 3.54, 3.73, 4.10, 4.56. Others are there but these are the most common.
You could jack up both wheels and spin the pinion yoke (instead of a wheel) but if one wheel's brakes grab more than the other then the two wheels will not spin the same distance with an open diff.
I agree with our Canadian bud. The best way is to take off the cover. The gears may not be original so the BOM# might not be right.
Ledgeclimber
That can't be right. That would be a 1.25 ratio. Way too tall! For this method to work both wheels must turn the same distance. Not hard for a locker or a posi but it is difficult to do with an open diff. I suspect the other wheel spun backwards some when you turned one wheel. If you have an open diff leave one wheel on the ground while turning the other. It is easier to turn the driveshaft for one rotation of the wheel. Double the number of times you have to turn the pinion yoke for one wheel rotation. That is your ratio. Common ratios are 3.54, 3.73, 4.10, 4.56. Others are there but these are the most common.
You could jack up both wheels and spin the pinion yoke (instead of a wheel) but if one wheel's brakes grab more than the other then the two wheels will not spin the same distance with an open diff.
I agree with our Canadian bud. The best way is to take off the cover. The gears may not be original so the BOM# might not be right.
Ledgeclimber
Thread Starter
|
Junior User
Joined: Jul 2002
Posts: 74
Likes: 0
From: USA
axle?
yeah I knew the 1.25 wasn't right so I was just letting it go with 2.72. I will try just one wheel later but that won't work with limited slip will it? Still probably going to end up pulling the cover. I am almost 100% sure it is original. I am the second owner of the truck and my grandfather told me that no major changes had been done to it.
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