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Old 11-21-2006, 10:14 AM
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Ease of rebuild

Funds are getting low for my project but I'm just too close to break sstride now. How difficult is would it be to rebuild my own rear vs. price I should expect to pay a tranny shop to do the job? i have an 8.5 inch open 10 bolt with 28 spline axles. I want to install a posi unit and 3.73 gears. I have turned a few wrenches in my day but am a little intimidated about this project as I have never done a rear end b4. Is there any "Rebuild for dummies" help available with cant miss instructions. How bad could I mess this up if I tried myself?

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Old 11-23-2006, 08:45 AM
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rear end go BOOM!

yes you can literally waste your money and possibly distroy your housing by not setting up the gear correctly.not alot of tools involved($)but to save money you can remove housing and bring to shop as bench unit without axles or cover,fluid,drums,tires,car on it,talk a tech not owner to do it on the side for case of beer(to be consumed after the pattern is correct on the ring gear)plus a 150 bucks.I've had great luck with posi housings out of mid seventies f-bodys the one with the s spring inbetween the side gears,junk yards are selling them for $150 complete,purchase at gm the new spring and clutch packs for about 125. Heres what i would do,goto junk yard buy posi f-bodyhousing,buy the parts from gm to liven up old clutches,at same junkyard find 1/2ton truck with obvious external damage to housing,take off cover find one with 3.73's buy it as they are the same as car 8.5's take pile of part and a new master install kit to have rebuilt.used parts cost 175,carrier,ring&pinion 125 for clucth packs 100 install kit $400 total cheaper than trying to buy just an auburn posi case.or you could drive the car for a month save some more money and save yourself lot of time and have it installed in one day but expecto pay atleast 300 for the install alone
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