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What should I do?

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Old May 23, 2008 | 12:31 PM
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What should I do?

Hi Guys, I don't post on here much (as I don't know much yet). But I read the post almost everyday and have learned alot. So I value your opinions. The PO of my 53 stuck a 8.5 10 bolt GM rearend under the truck, I went to pull the chunk cover off and water poured out! (Alot) Then instead of a limited Slip it is an open diff. with a 2.56 ratio. I have done a lot of online reading and read alot of the post on here about rear end swaps. The local pull a part has dozens of explorers and volvos with 8.8 rear ends with disc brakes and several 70-72 F-100 with 9 inch but drum brakes. Some of the explorers and volvos may be limited slip, have to wait till I get there and check the tags. Are any of these better than the other? Anything I should look for or watch out for? Thanks for your input. Oh Yeah, I also saw they have a 51 & 53 on the lot. Probably wont be much left but you never know
might be able to snag a tailgate or something! Have a great holiday weekend.
 
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Old May 23, 2008 | 12:38 PM
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2:56 ratio will net you some cruising speed, but unless you are running a hi-po big block, you will be sorely disappointed with the off-line power.
 
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Old May 23, 2008 | 12:43 PM
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IMHO they all have their own +'s and -'s........... probably less work and parts to swap in the 9".......... but rear discs are neat.....
I guess it depends on how much work you want to do and how much you have to spend............
 
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Old May 23, 2008 | 01:27 PM
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Originally Posted by mechmagcn
2:56 ratio will net you some cruising speed, but unless you are running a hi-po big block, you will be sorely disappointed with the off-line power.
Yep that is what I was thinking too. But all the bearings and seals would have to be replaced. Then I would have to mate a C6 tranny to the GM rear. Thats why I am thinking about going with an 8.8 or 9 inch.

Sparky, I'm like everyone else I guess, seems all my money is going into the gas tank right now. But this is my one and only darkside truck so I'm going to spend what I have to to make it nice and take as long as it takes I guess. (if I live that long ) I just don't want to stick something under there and then find out later that I gotta pull it. Yeah I kinda like the idea of disc on the back too.
 
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Old May 23, 2008 | 01:47 PM
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I put a 1972 truck 9 " in my 49 but I dont think the level of effort is that much different putting in the explorer reaf. The 9" is known for it's strength but unless you run a BIG engine I think that the 8.8 will be fine. IMHO I think that discs on the rear mostly are for bragging rights since the rear brakes do a smal fraction of the stopping. I did get the 72 rear to get the wider brakes. The advantages of the discs are mostly for brake fade problems. With my Jaguar IFS I have real good front discs. Just my opinions.
 
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Old May 23, 2008 | 02:02 PM
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[quote=Lakotas53;6186049] Then I would have to mate a C6 tranny to the GM rear. quote]

Hi, unless you get really, really lucky and find a drive shaft the right length you are going to have to have one shortened and the maybe a different flange welded on anyway so that part is not hugely important. Matching front and rear wheel bolt pattern (Multi-fit wheels) is though. If it is in there now, leave it and change ratio or diff latter


“Being wrong keeps me humble”
 
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Old May 23, 2008 | 04:28 PM
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Good point old F1...... did what I normally do and just answer rather than think BIG picture......if you have a GM front better to keep a GM rear IMHO.......easier to get wheels........and it is already setup for Chev so....
Mating the Ford C6 driveshaft to the rear should be easy......if I remember correctly you can get u-joints with Ford on one side and Chev on the other.........that would mate the Ford driveshaft to the Chev rear...........or as they are more commonly used by the Chevy guys Chev driveshaft to Ford 9" rear
 
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Old May 23, 2008 | 05:40 PM
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See that is why I come to you guys! You just saved me a 60 mile trip to Pull a Part! I measured the bolt pattern and came up with 4.5 but after reading your post it got me to thinking So I went online and found that I was measuring incorrectly (center to center) instead of center of one to back of the other stud. came up with 4.75. Soooooo I guess I'll keep the GM rear. But I was looking forward to the 98 dollar ford rear (plus core charge) at pull a part Vs rebuilding the GM at several hundred dollars. Not to mention No disc brakes and this GM does not have 1 brake part on it. So all of that will have to be bought new too. Maybe I just need to go down and pull a different GM rear???? Same price... hmmmmmmm
 
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Old May 23, 2008 | 05:52 PM
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Lakota, check this out..Kevinstang's Ford Nine Inch Differential Page + Jim
 
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Old May 23, 2008 | 08:04 PM
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Thanks for the site Jim! It has a ton of good info on the 9 inch. But I guess I will stick with the Che*y Rearend since I have A Che*y front clip. I just don't like the idea of 2 spare tires or running universal rims. No big deal I'll just rebuild what I have a little at a time as the funds come avaliable. I just can't believe the PO used what he did. To me it makes sense to use a ford front and rear on a ford. Keep it all the same. Now to start looking for a posi unit to go in and a bearing kit. Thanks guys for all the input. Cheers
Lakota
 
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