[robz]

I simply did a google search..I believe one link was to here on an older PY post..The other I'm not sure..simply search for "Pontiac 9799202" and "Pontiac 9793235"...

['ol Pinion head]

Originally Posted by steved400

Who started the axle being different in the N rearend? Curious what the facts are behind that?

83 MPC shows the same axle for A 68-70 exc. L.D.

Doesn't have a listing for the L.D. in 83, so I can't see if there were differences in L.D.'s; which there would have to be if the story is correct about the axles are different for N. Anyone have an older MPC they can check to verify?

I wrote it because its true. Of course I doubt you'll believe anyone who has chased N rears for nearly 15 years & has torn down & rebuilt multiple dozens of them. 2nd, '83 MPC is of no good = Superceded parts. Further... not only have '71, 72, & 73 dated master parts books, original factory service manuals also warn against mixing std & HD axles.

[Steve Hoog]

Why in the world would you say I doubt it? I wasn't sure who first said it, I just wanted to verify there is more to it than just another story passed on for years. Any chance of getting the data from the eary MPC? Or maybe scanning and posting the page?

[1966sprint]

It would be great if someone has a casting data that can scan and post. Thanks!

[Steve Hoog]

I'll start up a list.

[Steve Hoog]

Here you go:

http://www.428gto.com/pontiacrearends.htm

I need help filling in the blanks, I'll start a new thread.

[johnta1]

If all you're wanting is the stamped Axle Id code on the axle tube, try my Axle Search page.

Input the year for a listing of each code for that year.
Or if you know the code input it.

[RAM AIR 1967]

In the 1969 Pontiac shop manul it talks about GP with 3:55 and lower being a HD axles and don't mix them.

[Steve Hoog]

Those GP rears should be the same as the GTO.