Differential
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7th Gear
Joined: Sep 2024
Posts: 7
Likes: 0
Differential
Hello all. I would like to change out my old Diff .Can someone tell me what Diff will fit my truck with very little modifcations . So what I am saying simple simple simple Oh i have a 1950 m68 or a f3 truck I understand it is 54 inches back plate to back plate I am useing the truck as a daily driver and i would like to have drum brake on the back there must be a car or truck Diff that will work. Thank you
5th Wheeling
Joined: May 2023
Posts: 28
Likes: 12
I used a diff from a 71 F250 with 3.73 gears in my 48 F3. Sure beats the 4.86 gears. Wheel.spacing is right . Spring perches right.Was able to use the park cables with a little rework.
Joe
Joe
Last edited by 75 F350 1Ton; Oct 10, 2024 at 07:51 PM. Reason: Puncuation
Hotshot
Joined: Oct 2009
Posts: 16,174
Likes: 4,781
From: Burbank, WA
Hello all. I would like to change out my old Diff .Can someone tell me what Diff will fit my truck with very little modifcations . So what I am saying simple simple simple Oh i have a 1950 m68 or a f3 truck I understand it is 54 inches back plate to back plate I am useing the truck as a daily driver and i would like to have drum brake on the back there must be a car or truck Diff that will work. Thank you
Cargo Master
Joined: Aug 2015
Posts: 2,074
Likes: 101
From: Marana, Arizona
I used a Dana 60 from a 1972 F250 in my 52 F3. I have the driveline parking brake so I didn't need the parking brake at the drums. I just removed the un necessary pieces. Some of the swaps need a conversion U-joint. Mine did not.
I had to adapt the brake line. Easy to do with an adapter fitting.
I had to shorten the drive shaft a bit.
It will pretty much bolt in but the pinion angle will be off.
I'm going to try to copy links from my swap posts.
https://www.ford-trucks.com/forums/1...l#post15755535
I had to adapt the brake line. Easy to do with an adapter fitting.
I had to shorten the drive shaft a bit.
It will pretty much bolt in but the pinion angle will be off.
I'm going to try to copy links from my swap posts.
https://www.ford-trucks.com/forums/1...l#post15755535
Cargo Master
Joined: Aug 2015
Posts: 2,074
Likes: 101
From: Marana, Arizona
Here's some U-joint information. It seems some of us needed an adapter U-joint. Mine did NOT. see the last post for what I used. https://www.ford-trucks.com/forums/1...l#post15623979
Cargo Master
Joined: Jan 2004
Posts: 2,196
Likes: 351
From: Mandan, ND
1967 and earlier Ford Dana 60s came standard with 4.56:1 ratios, not a huge improvement from your 4.86:1 ratio. From 68 on, the standard 4x4 ratio was 4.11:1. Best bet is 68 and later 2wd Dana 60. Don’t know much about the 2wd ratios, but most likely in the 3s.
Cargo Master
Joined: Aug 2015
Posts: 2,074
Likes: 101
From: Marana, Arizona
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7th Gear
Joined: Sep 2024
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Thank you for the info . I should have said that i want to go to a 5 bolt and get rid of the 8 bolt.
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Tuned
Joined: Oct 2008
Posts: 259
Likes: 139
From: South Amboy NJ
The rear end in my 56 flatbed has tag on the housing that says 2.90.
I can run down the open highway at 65 mph at 2100 rpms.
I would love to know what kind of Ford vehicle that rear was originally in ?
BT
I can run down the open highway at 65 mph at 2100 rpms.
I would love to know what kind of Ford vehicle that rear was originally in ?
BT
Fleet Owner
Joined: Dec 2000
Posts: 25,378
Likes: 5,387
From: Central PA
That's good to know Bob. That will make the trip to TS 2025 all the better!
Hotshot
Joined: Oct 2009
Posts: 16,174
Likes: 4,781
From: Burbank, WA
We'll need more information to go by to help identify your axle. Is there any other info on the tag besides 2.90? Do you know what type of rear end it is? (9", Dana 44, etc?)
Tuned
Joined: Oct 2008
Posts: 259
Likes: 139
From: South Amboy NJ
So I’ll be able to get some good pictures of the rear housing.
thanks
BT
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