Auto Parts: interchangable rear end in 81 Formula, spring perches, formula firebird


Question
1981 Formula Firebird upgraded engine 350! Pinion gear going bad right seal leaking drum brakes Would like to change it out for 12 bolt (not necessary, but nice) & disk brakes a must, oh yea would like to keep the rear set for high way mileage (18 MPG) I am NOT into racing my bird!
Do you have any ideas what years and models would fit into place!

Answer
Hi Vernon,

Without doing some serious modifications, you're staying with drum brakes. The disk set-up had a different master cylinder and prop valve assembly along with an upgraded line package. The spring perches for each rear are in different locations as are the shock mounts.

If you like what you have, repair it. Replacement will be a chore.

Looking for a reputable service technician? My advice on finding a good technician is: Steer clear of the dealership and 'chain' stores like Firestone, Sears, Pep Boys, Monro Muffler/Brake, Midas, etc. as they usually only employ ONE ASE Certified Tech just so they can say they do and chances are, that guy is the asst. manager or manager and is not in the store to diagnose/repair vehicles anyway. Find a service location in the link below or get some names out of the yellow-pages and do a drive-by. Garages that employ ASE Certified Technicians will be marked with the 'Blue-Seal' insignia. If unsure about whether a place employs Certified Techs, just ask to see their credentials. ALL ASE Certified Technicians will be PROUD to show and display their certificate(s).

Thanks for the question, I hope this information was helpful to you.
Fred
Knucklebusters Used Auto & Truck Parts, Inc.
www.knucklebusters.us
570-453-0910
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