Rear end swap?

jtbshaw · 03-31-2008, 09:18 AM

I believe you have the '84-85 rear due to the flange size that you are mentioning. IIRC, the 79-83s had the smaller flanges. The easiest way that I would suggest for you, and I would recommend this anyway for balancing purposes, is to change out your driveshaft that goes with the rear end. This was everything will bolt right up. Mark your driveshaft for alignment/correct balance points, if it's not too late. Hope that helps.

TheDriver216 · 03-31-2008, 02:05 PM

after reading around and searching the 7 club.. mazda apparently made teh change 1/2 way through 83.. so i might have an 83 1/2 rear.. and i seen a rear swap where someone took and swapped a gsl rear and then changed the mating flange on teh diff.. my only concern is if it will mess up pinion lash etc etc when i change the flange

85rx-7gsl-se · 03-31-2008, 03:13 PM

Quote:

Originally Posted by TheDriver216

after reading around and searching the 7 club.. mazda apparently made teh change 1/2 way through 83.. so i might have an 83 1/2 rear.. and i seen a rear swap where someone took and swapped a gsl rear and then changed the mating flange on teh diff.. my only concern is if it will mess up pinion lash etc etc when i change the flange

You are correct, the rear changed to the big bearing style late in 83...so a few 83s had the 84-85 style. FireGSLSE and I were discussing this the other day

03-31-2008, 09:18 AM	#1
jtbshaw ORD - Old Rotary Dude Join Date: Feb 2008 Location: Pelham, AL Posts: 319 Rep Power: 18	I believe you have the '84-85 rear due to the flange size that you are mentioning. IIRC, the 79-83s had the smaller flanges. The easiest way that I would suggest for you, and I would recommend this anyway for balancing purposes, is to change out your driveshaft that goes with the rear end. This was everything will bolt right up. Mark your driveshaft for alignment/correct balance points, if it's not too late. Hope that helps.

03-31-2008, 02:05 PM	#2
TheDriver216 Rotary Fanatic Join Date: Feb 2008 Location: Cleveland, Ohio Posts: 159 Rep Power: 18	after reading around and searching the 7 club.. mazda apparently made teh change 1/2 way through 83.. so i might have an 83 1/2 rear.. and i seen a rear swap where someone took and swapped a gsl rear and then changed the mating flange on teh diff.. my only concern is if it will mess up pinion lash etc etc when i change the flange