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GM B-Body Forum, 77-79 Caprice/Impala Forum

A forum for all the owners and enthusiasts of General Motors B-Bodies from 1965-1996, but dedicated to the owners of 1977-1979 Impalas and Caprices. Join up now!

    28 or 30 spline axle



    Posts : 1
    Join date : 2015-06-19

    28 or 30 spline axle

    Post  DonPhe82 on Fri Jun 19, 2015 6:47 pm

    Hey yall,

    i have a 1988 Chevy Caprice Classic Brougham LS and I was wondering was there a way to identify if I had a 28 or 30 spline axle w/o taking the axle out???? 88 was the year that they ran 28 and 30 spline axles, please help!!!!!

    Posts : 458
    Join date : 2013-02-06
    Location : Kentucky

    Re: 28 or 30 spline axle

    Post  solo79 on Sun Jun 21, 2015 9:49 am

    Hey, Welcome to the Forum! I'm not real sure if you can determine it without taking them out, but I'm sure someone here will chime in that may know.

    1979 Caprice Classic Carmine Metallic 2-door 350/TH350 -under slow frame off restoration!
    1982 Pontiac Trans Am Black T-Top 327/TH350 -Knight Rider KITT replica
    1989 Pontiac Firebird Black T-Top 305/700R4 -nice sunny day daily driver
    1997 Chevrolet Silverado Ext. Cab 3rd Door White Vortec 350/4L60E
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    Join date : 2013-01-14
    Age : 25
    Location : Flint/Detroit, MI - Charlotte, NC

    Re: 28 or 30 spline axle

    Post  GM B-Body Forum on Mon Jun 22, 2015 7:28 pm

    Welcome, do you know if you have the 7.5 or 8.5? Theres no way to determine without taking them out.

    1979 Caprice Sport Coupe, 400hp Vortec 350, Th350, GM 8.5 w/disc brakes, 3.90 gears Detroit Truetrac, 2.5" stainless duals w/ x-pipe, Dynomax race bullets.
    1984 Caprice Sedan, 305 motor, 700r4
    1978 Caprice Sedan, 305 motor, th350
    1993 L99 Caprice, 4.3 v8, 4l60 trans
    1972 Ford F-100, 302 windsor, c4 trans
    2001 BMW E46 330i, 3.0L

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    Re: 28 or 30 spline axle

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