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| | | | Joined: Jan 2008 Posts: 21 Apprentice | | Apprentice Joined: Jan 2008 Posts: 21 | I have found a deal that would give me the rear end from a 1985 3/4 ton burban. can anyone advise on putting it in a 47 3100? also it has a 350 csb and trubo 350 trans. would it be worth using as a donor? | | | | | Joined: Dec 2003 Posts: 1,554 Shop Shark | | Shop Shark Joined: Dec 2003 Posts: 1,554 | I am guessing that it would be a little too wide for the 47.You also want to check the gear ratio.The 350 SB and 350 Turbo should workout just fine. | | | | | Joined: Mar 2004 Posts: 874 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 874 | I also agree it's too wide and won't have a desirable gear ratio.
I don't think you would want different bolt patterns for front and rear either. | | | | | Joined: Jan 2008 Posts: 21 Apprentice | | Apprentice Joined: Jan 2008 Posts: 21 | so the engine and tranny combo would be fine with the stock r/e? | | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | Wrong. The stock rear end is closed drive shaft & is geared too low. You will need to make some changes but the 3/4 ton is too big & heavy & uses 8 bolt wheels.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Mar 2004 Posts: 874 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 874 | Your torque tube rearend is not compatible with the turbo 350.
You need to convert to open driveline... | | | | | Joined: Oct 2006 Posts: 4,983 Master Gabster | | Master Gabster Joined: Oct 2006 Posts: 4,983 | I would look at replacing the orig rear with something a little heaver and with better gears. I assume you have a 47 2nd which means you will need something around 62" wide. Good luck with the tape measure.
~Jim
| | | | | Joined: Jan 2008 Posts: 21 Apprentice | | Apprentice Joined: Jan 2008 Posts: 21 | Thanks,
any suggestions on what to pull a r/e out of? | | | | | Joined: Oct 2006 Posts: 4,983 Master Gabster | | Master Gabster Joined: Oct 2006 Posts: 4,983 | Late 70s early 80s Camaro/Firebird 10 bolt and there are 12 bolt rears that will fit as well. You will need to move the spring perches.
Check the archives here and you will find a lot of posts on this subject.
~Jim
| | | | | Joined: Oct 2001 Posts: 3,458 Extreme Gabster | | Extreme Gabster Joined: Oct 2001 Posts: 3,458 | The '63-'67 Chevy truck rearends are a nice choice, I have one with a 3.07 gear set and six bolt wheels that is 62" wide going into my truck. You just need to weld on new spring perches.
Paint & Body Shop moderator
A lone amateur built the Ark. A large group of professionals built the Titanic. | | | | | Joined: Dec 2003 Posts: 299 Wrench Fetcher | | Wrench Fetcher Joined: Dec 2003 Posts: 299 | How about a 55-6-7 Chev car rear end, it already has perches,could it be a good width? | | | | | Joined: Oct 2006 Posts: 4,983 Master Gabster | | Master Gabster Joined: Oct 2006 Posts: 4,983 | Finding early model rears in a junk yard will be difficult. Check on the archive here. There are web sites that list all the different options (vehicles) and their widths.
~Jim
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