rearend
Thread Starter
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Mountain Pass
Joined: May 2009
Posts: 235
Likes: 0
From: Snow Camp, NC
rearend
What year model rearend can be swaped for my factory 49 F-1 rearend? I want to drive it up n down the interstate at 70 miles an hour. The 411 gears makes the truck tach to much to do that. So I was wanting like 327 or 355 gears in it. Please help I leave for training to go back to Afghanistan again in May, and need to have the rearend to the guy so while I'm gone he can finish my truck.
Lead Driver
Joined: Apr 2002
Posts: 8,813
Likes: 13
From: Littleton, New Hampshire
The closest thing to a bolt-in replacement is a Ford pickup 9 inch from 57-72. It will require some fabrication on the drive shaft and shocks but otherwise fits right in. These rears have a wide variety of ratios. If you are running the original engine I would think that something around 3:25 would be ideal...
Thread Starter
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Mountain Pass
Joined: May 2009
Posts: 235
Likes: 0
From: Snow Camp, NC
The closest thing to a bolt-in replacement is a Ford pickup 9 inch from 57-72. It will require some fabrication on the drive shaft and shocks but otherwise fits right in. These rears have a wide variety of ratios. If you are running the original engine I would think that something around 3:25 would be ideal...
Lead Driver
Joined: Apr 2002
Posts: 8,813
Likes: 13
From: Littleton, New Hampshire
The 9 inch has a three inch diameter housing so your original U-bolts and lower shock mounts won't fit. If you could find a pair of F-2 or F-3 shock mounts they should fit the 3 inch housing, otherwise you need some weld on lower brackets. I believe you can get some at Summit or Jegs.
Post Fiend
Joined: May 2008
Posts: 7,641
Likes: 21
From: Poway, Ca.
Carefull!
Make sure that if you go that route that you remove the existing shock bracket, get new round bottom U-bolts made and a holding plate to bolt down on top of the springs.
My PO tried to split and weld a spacer into the shock brackets to fit the larger tube. They won't hold.
When I went to have the lifting blocks removed from the back, my spring guy went to tighten those down and one broke on that weld - they are cast.
He told me I was lucky to be alive.
I just had new back springs put in the truck and am breaking them in (yes driving with NO shock absorbers at all in the back). In a few days, he is going to make new shock mounts and install them so they will be in the most advantageous position. He says the shock do nothing with the way they are mounted in the OEM configuration. And this guy knows what he's doing!
If you want to wait until then and remind me with a PM, I'll take pictures of what he did and send them to you.
Make sure that if you go that route that you remove the existing shock bracket, get new round bottom U-bolts made and a holding plate to bolt down on top of the springs.
My PO tried to split and weld a spacer into the shock brackets to fit the larger tube. They won't hold.
When I went to have the lifting blocks removed from the back, my spring guy went to tighten those down and one broke on that weld - they are cast.
He told me I was lucky to be alive.
I just had new back springs put in the truck and am breaking them in (yes driving with NO shock absorbers at all in the back). In a few days, he is going to make new shock mounts and install them so they will be in the most advantageous position. He says the shock do nothing with the way they are mounted in the OEM configuration. And this guy knows what he's doing!
If you want to wait until then and remind me with a PM, I'll take pictures of what he did and send them to you.
Thread Starter
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Mountain Pass
Joined: May 2009
Posts: 235
Likes: 0
From: Snow Camp, NC
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New User
Joined: Apr 2010
Posts: 2
Likes: 0
F2 Rear end question
Julies Cool F1 - I have a follow up question for you...
I have a 49 F2 that I want to put a 9 inch rear end in. Is there a rear end that will fit without the need to shorten axles etc? What about the shock mounts? Will I need to modify those as well?
I will be using a 351W/AOD setup in the truck, so I will also be getting a new driveshaft made.
Thank you for the help!!
I have a 49 F2 that I want to put a 9 inch rear end in. Is there a rear end that will fit without the need to shorten axles etc? What about the shock mounts? Will I need to modify those as well?
I will be using a 351W/AOD setup in the truck, so I will also be getting a new driveshaft made.
Thank you for the help!!
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Elder User
Joined: Nov 2008
Posts: 915
Likes: 1
From: Gunbarrel, Co.
Welcome to the forum, my question to you is, did you not read any of the thread before you posted? Your answer lies within, or you could do a search or read this.
https://www.ford-trucks.com/forums/1...e-for-fte.html
Forget about the search engine here really sucks!!!
https://www.ford-trucks.com/forums/1...e-for-fte.html
Forget about the search engine here really sucks!!!
New User
Joined: Apr 2010
Posts: 2
Likes: 0
HD74 -
Thank you for link - That has a ton of really good info... i Could not find that info early when I tried to search for it.
I did read the thread above, but wanted to be sure since I have an F2 vs the F1, which i know has different overall dimensions than an F1.
thanks
Thank you for link - That has a ton of really good info... i Could not find that info early when I tried to search for it.
I did read the thread above, but wanted to be sure since I have an F2 vs the F1, which i know has different overall dimensions than an F1.
thanks
Elder User
Joined: Nov 2008
Posts: 915
Likes: 1
From: Gunbarrel, Co.
HD74 -
Thank you for link - That has a ton of really good info... i Could not find that info early when I tried to search for it.
I did read the thread above, but wanted to be sure since I have an F2 vs the F1, which i know has different overall dimensions than an F1.
thanks
Thank you for link - That has a ton of really good info... i Could not find that info early when I tried to search for it.
I did read the thread above, but wanted to be sure since I have an F2 vs the F1, which i know has different overall dimensions than an F1.
thanks
https://www.ford-trucks.com/forums/8...puzzle-10.html
Mountain Pass
Joined: Feb 2009
Posts: 173
Likes: 49
From: Louisville, KY
I used a 1970 F250 rearend that was a DANA 60. Its the right size. It was basically a bolt in. Needed some shims to change the pinion angles, used my original shock mounts (ground off the ones from the 1970 DANA 60). Needed longer U-bolts, and a longer leaf pack bolt. I used the leaf pack bolt to mount a pinion angle shim. You may also need to check drive shaft and center drive shaft bearing. Your should have a two piece drive shaft.
After the install I could keep up with traffic, except my center bearing did not like the 70 mile an hour speed, an
started to fall apart. I then limped home after puting it back together. Also may want to check toe in. The truck vibrates from 70 up. Got it fixed an it went away.
After the install I could keep up with traffic, except my center bearing did not like the 70 mile an hour speed, an
started to fall apart. I then limped home after puting it back together. Also may want to check toe in. The truck vibrates from 70 up. Got it fixed an it went away.
Elder User
Joined: Nov 2008
Posts: 915
Likes: 1
From: Gunbarrel, Co.
I used a 1970 F250 rearend that was a DANA 60. Its the right size. It was basically a bolt in. Needed some shims to change the pinion angles, used my original shock mounts (ground off the ones from the 1970 DANA 60). Needed longer U-bolts, and a longer leaf pack bolt. I used the leaf pack bolt to mount a pinion angle shim. You may also need to check drive shaft and center drive shaft bearing. Your should have a two piece drive shaft.
After the install I could keep up with traffic, except my center bearing did not like the 70 mile an hour speed, an started to fall apart. I then limped home after puting it back together. Also may want to check toe in. The truck vibrates from 70 up. Got it fixed an it went away.
After the install I could keep up with traffic, except my center bearing did not like the 70 mile an hour speed, an
started to fall apart. I then limped home after puting it back together. Also may want to check toe in. The truck vibrates from 70 up. Got it fixed an it went away.Here some more reading: http://www.maliburacing.com/ford_9_i..._nine_inch.htm