[1966sprint]

Does anyone have the correct rear end casting # that a 1969 RA 4 used? Is there a casting # book out there? Thanks!

[SWEETJUDGE]

XM is the code for 4.33 rear...they could have gotten 3.90s aswell but dont know the code off hand....XG possibly

[SWEETJUDGE]

all IV cars should have the "N" case which is cat into the housing...thats the dead giveaway

[robz]

3.90s were XK...

[1966sprint]

what about the casting # on the center, Was there a specific casting # for the ram air iv ? I have is 2 rearends with the N and XM on it . The casting #s are different on each. 1 has a casting # of 9799202 and the other has a casting # of 9793235 . This is the casing # on center section .

[robz]

Googling shows this (not necessarily correct as I do not know source of info):

9793235 is a '68 casting number while 9799202 is a '70..None mention these numbers specific to any GTO engine

[Held for Ransom]

I believe the '69 HD rear had a casting number of 9795084.

[1966sprint]

Is there some publication where these #s can be found?

[Ram4king]

Originally Posted by Held for Ransom

I believe the '69 HD rear had a casting number of 9795084.

Thats correct I have 2 69 433 rears and thats the casting number on them.

[cressy]

I have a bare "N" housing out of 69 GTO which had a 4 pinion posi with 3:90 gears and the cast # is also 9795084.
I sold the posi and gears and axles years ago, dumb.

[Steve Hoog]

Cressy, would you consider selling the housing?

[goatless]

Originally Posted by robz

Googling shows this (not necessarily correct as I do not know source of info):

9793235 is a '68 casting number while 9799202 is a '70..None mention these numbers specific to any GTO engine

I have a 9799202 that I believe is a 1969 XH. It has the N and was pulled from a very rusty but low milage '69 4 speed GTO. The axle tubes are too pitted to get any codes off of and the casting date on the center is funky- only 3 digits, very clear and evenly spaced- 1 4 9.

[Todd Kozak]

1966sprint, I am looking for a 1970 XM 4.33 rear if you want to sell thanks let me know

[Steve Hoog]

I just want A 4.33 N rear A body, I do not care about codes or years.

[bulletpruf]

Originally Posted by 1966sprint

Is there some publication where these #s can be found?

I don't know; maybe Eric White's book? Don't have it with me, but has some pretty good info on part #'s.

Have a few 3.55 N rearends. 9795084 casting.

What's the deal with the axles? Are they supposed to be non-tapered for the HD N r/e? I have one HD 4 pinion posi 3.55 r/e with one tapered and one non-tapered axle.

Scott

[Steve Hoog]

Scott

That was my next question, what's up with the axles. If I had an older MPC I'd be checking out the listings to see what differences it showed. I doubt my 83 MPC has anything good, but I'll look here in a bit.

If the third member is the same on a 3.55 to 4.33, I would be willing to pay good money for a HD 3.55 N A. I have a regular XH 3.55 I paid $650 for, I would trade or sell that to anyone towards my goal. I also have a 12 3.73 with new GM axles and clutch kit that has been in my 69 GTO since the early 80's, will sell or trade that toward my goal also. Do not know a price on that one, what ever the going rate is.

[The Boss]

Isn't 68 a ZL code?

[Steve Hoog]

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?

[Steve Hoog]

1968 2.56 XB ZB FB
1968 2.56 WB YB GTO 2 PINION
1968 2.78 XC ZC FB
1968 2.78 WC YC GTO 2 PINION
1968 2.93 XD ZD FB
1968 2.93 WD YD GTO 2 PINION
1968 3.08 XE ZE FB
1968 3.08 WE YE GTO 2 PINION
1968 3.23 XF ZF FB
1968 3.23 WF YF GTO 2 PINION
1968 3.36 XG ZM FB HD 4 PINION
1968 3.36 WG NONE GTO 2 PINION
1968 3.36 NONE ZG GTO 4 PINION
1968 3.55 XH ZN FB HD 4 PINION
1968 3.55 WH NONE GTO 2 PINION
1968 3.55 NONE ZH GTO 4 PINION
1968 3.90 NONE ZP FB HD 4 PINION
1968 3.90 NONE ZK GTO 4 PINION
1968 4.33 NONE ZR FB HD 4 PINION
1968 4.33 NONE ZL GTO 4 PINION
1969 2.56 YB ZB FB
1969 2.56 WB XB GTO AUTOMATIC ONLY
1969 2.78 YC ZC FB
1969 2.78 WC XC GTO AUTOMATIC ONLY
1969 2.93 YD ZD FB
1969 2.93 WD XD GTO AUTOMATIC ONLY
1969 3.08 YE ZE FB
1969 3.08 WE XE GTO AUTO/MANUAL
1969 3.23 YF ZF FB
1969 3.23 WF XF GTO AUTO/MANUAL
1969 3.36 YG ZG FB
1969 3.36 WG XG GTO AUTO/MANUAL
1969 3.55 YH ZH FB
1969 3.55 WH XH GTO AUTO/MANUAL
1969 3.90 NONE ZK FB HD 4 PINION
1969 3.90 NONE XK GTO AUTO/MANUAL
1969 4.33 NONE ZM FB HD 4 PINION
1969 4.33 NONE XM GTO AUTO/MANUAL
1970 2.73 CRX CRY FB
1970 3.07 COS COT FB
1970 3.07 WT XT GTO AUTOMATIC ONLY
1970 3.08 COE COF FB
1970 3.08 WE XE GTO MANUAL ONLY
1970 3.23 WF XF GTO AUTO/MANUAL
1970 3.31 COU COV FB
1970 3.31 WU XU GTO 455 HO ONLY(C-TYPE AXLE) 12 BOLT
1970 3.36 COK COL FB
1970 3.55 COW COX FB
1970 3.55 WV XV GTO 455 HO ONLY(C-TYPE AXLE) 12 BOLT
1970 3.55 WH XH GTO AUTO/MANUAL
1970 3.73 NONE COZ FB
1970 3.90 NONE XK GTO AUTO/MANUAL
1970 3.90 WK YK GTO ONLY USED WITH M-21 TRANS
1970 4.33 NONE XM GTO AUTO/MANUAL
1970 4.33 NONE 7N GTO AUTO/MANUAL

[1966sprint]

Originally Posted by robz

Googling shows this (not necessarily correct as I do not know source of info):

9793235 is a '68 casting number while 9799202 is a '70..None mention these numbers specific to any GTO engine

Robz, where did you get this imfo from??