I have read thru so many threads here about different makes,sizes,longer/shorter driveshafts uzzled: etc but how does one take a stock non posi unit and make it over? I know for economics/availability guys--adapt,improvise,overcome etc to get what they need. Maybe what I am asking is not practical etc--so that is what I need to find out.I don't minding spending a reasonable amount but if it's too high I guess I can live without it but I will be going to the track and would like to have it :grin: Pete
Cheapest and quickest solution is to get the GM 410408 posi unit for 3 series gears from 80-87 full size GM wagons. Read this article www.buickperformance.com/posi.htm You will need to take it to a rear axle builder for them to inspect your axle bearings and set-up the posi unit for your car.
That's what I just completed on my LeSabre's 8.5 rear, a junkyard posi carrier, new clutches/spring/shims, and FINALLY found a local shop to put it in. junkyard axle - $100 clutches, etc - $175 (Randy's Ring and Pinion) rebuild carrier and install - $298 total = $575. I'm happy! :TU: (and it just took me 8 months of piddling around)
