hey guys, i have a 1986 drum posi rear with 3.23's i'm going to be putting a new posi carrier and 3.73's in but the new carrier is 28 spline axles, and my old 26 spline axles are toast due to worn bearings, what year rears can i get 28 spline axles out of? is there a difference in drum vs. disc? also do you know what speedo gears i need to change to? it's a T5, 10 bolt 7.5 drum setup

 

I believe it's '89 and up that have the 28
spline axles. The disc rear ends are totaly
different BW 9 bolts. My '88 has 26 spline axles.

 

89 is a crossover year. most were still 26 spline. You want to find a 90-92.

You can also buy better aftermarket 28 spline axles from places like www.drivetraindirect.com for $125 each. The aftermarket ones fit drum or disk. I don't know about factory axles.

------------------
Follow my racing progress on Stephen's racing page
and check out the race car

87 IROC-Z SuperPro ET Bracket Race Car
461 naturally aspirated Big Block (times are for the current engine)

Best ET on a time slip: 11.447 altitude corrected to 10.99
Best MPH on a time slip: 119.42 altitude corrected to 124.86
Altitude corrected rear wheel HP: 493
Best 60 foot: 1.586

Racing at 3500 feet elevation with a typical race day over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley