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Old Nov 3, 2010 | 10:26 AM
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Default Just a thought

I was sitting and waiting on a green light the other day and noticed a caprice in front of me. Correct me if im wrong but isnt the caprice/impala rear end a 8.5 10 bolt. Would it be easier than swapping over a 8.8 and cheaper than a 12 bolt/9". Its just a thought prolly wouldnt be worth it but figured would hurt to ask.
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Old Nov 3, 2010 | 10:46 AM
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Iam not a B Body guy but I would check to see if it is the same type of suspension system. Not sure if B bodies used TQ arms. They may have had upper trailing arms which is akin to the older G bodies.

Edit:

I skimmed over google, came up with this....

http://www.google.com/imgres?imgurl=...:1&um=1&itbs=1


Last edited by BlackScreaminMachine; Nov 3, 2010 at 10:52 AM.
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Old Nov 3, 2010 | 10:59 AM
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You could make anything work if you have the time & are creative enough at fabricating. How do you think these guys are making these 8.8s work? Theyre welding the 10 bolt axle tubes on it & making a mount for torque arm, & using the 10 bolt axles. I gotta hand it to them for doing so but I would rather buy one from someone that makes them that I know will be reliable.
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Old Nov 3, 2010 | 11:14 AM
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the f-body is the only torque arm later model car that gm ever produced. the caprice uses a coil-spring suspension that is similar to the 82 and newer mustangs and would be no different that the 8.8 swap. a GM 8.5 rearend can be built as strong as a 8.8 ford, but can be costly.
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Old Nov 3, 2010 | 11:48 AM
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Originally Posted by flintwrench69
You could make anything work if you have the time & are creative enough at fabricating. How do you think these guys are making these 8.8s work? Theyre welding the 10 bolt axle tubes on it & making a mount for torque arm, & using the 10 bolt axles. I gotta hand it to them for doing so but I would rather buy one from someone that makes them that I know will be reliable.
The average enthusist is not a fabricator. Based on what the OP is asking, I would say he is going to have to pay someone to do the job.
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Old Nov 3, 2010 | 02:38 PM
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Originally Posted by BlackScreaminMachine
The average enthusist is not a fabricator. Based on what the OP is asking, I would say he is going to have to pay someone to do the job.
No i was planning on taking it on myself i was just wondering if it would be any easier than an 8.8 conversion. Basically i was wondering if most of the suspension and axle tubes were the same.
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Old Nov 3, 2010 | 03:45 PM
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Originally Posted by lethal bird
No i was planning on taking it on myself i was just wondering if it would be any easier than an 8.8 conversion. Basically i was wondering if most of the suspension and axle tubes were the same.
From what I read the 10 bolt axles slide right into the 8.8 rear, same splines. The 8.5 rear axles & tubes are larger diameter.
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Old Nov 3, 2010 | 03:48 PM
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Originally Posted by flintwrench69
From what I read the 10 bolt axles slide right into the 8.8 rear, same splines. The 8.5 rear axles & tubes are larger diameter.
Gottca thanks
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Old Nov 3, 2010 | 04:38 PM
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What I would like to know is how GM could have justified putting 7.5s in our cars when they already were putting 8.5s in Caprices!
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Old Nov 3, 2010 | 05:43 PM
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I think you can thank the 82-84 f-body cars they had hp numbers that would be lucky to break 200hp with a shot of Nitrous


they knew there was an issue and used the 9bolt 7.75" and offered a dana 44 but the 7.5/7.6 was in the s-10 so parts were cheaper which im sure they figured well parts are cheap and we can make these in house. had the 8.5 been cast from the start like the 7.5 im sure thats what you would have been given and wondered why not a 12 bolt
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