[phoenixpnr]

Does anyone have the casting numbers for 67 thru 69 nodular Bird rears?
I have a 67 bird with 67 dated 3.90 gears and a 4 pinion posi, but there is no N on the housing? I have what I believe are 2 68 rears with 9793020 on them, I have not checked the 69s that are in cars yet. Are 69s also 9793020 just the flat areas on the tubes?
Thanks

[Steve Hoog]

Somewhere in here I have posted my 68 N rear; but it was TOO many years ago for me to remember where. I don't even know that they keep the threads that long; but if you search me and "N" rears you might find it.

[Steve Hoog]

One thread, but maybe not what you need.

http://forums.maxperformanceinc.com/...hlight=rearend

[phoenixpnr]

I read through all 5 pages and no casting numbers for Birds, just something about you and Jim Beam

[Steve Hoog]

There was one post with some pics by Chris (The Boss's) friend; he may still have his, I don't. I did post the casting and pics somehwere; but it's burried in the past.

[roundportponchos]

I know there were 2 diff. cast #s for 69 birds. Early/later cars. I will have to look under the two raivs here.....

[phoenixpnr]

Originally Posted by steved400

There was one post with some pics by Chris (The Boss's) friend; he may still have his, I don't. I did post the casting and pics somehwere; but it's burried in the past.

There were pics of A body rears.

[Held for Ransom]

http://www.forums.maxperformanceinc....d.php?t=632457

9793020 is '68
9795107 is '69

[phoenixpnr]

Originally Posted by Held for Ransom

http://www.forums.maxperformanceinc....d.php?t=632457

9793020 is '68
9795107 is '69

I have heard that there is an early and late 69,
did the 97973020 carry over into early 69?
Were there 67 Bird nodular housings, did they have the large N on them, what number?

[Cammer-6]

heres what I have on 10 bolts
9773369 64 small eyelet
9779822 64-5 large eyelet
9783393 66-7 A,67 F
9792977 68 A
9793235 68 A
9793019 68 F
9795082 69 A
9795105 69 F
9799100 70 A
9799202 70 A

early and late 69 used roller vs taper bearing and LH thread vs RH thread ring gear

[Held for Ransom]

I'm not sure on the '67.
The '69 early/late may have had something to do with the '69 carryover into the '70 MY. Again, I'm not sure.

[A Schab]

I have a 9795107 cast 3 of 69 ZK 3.90 in an 08E R/A IV T/A.

[phoenixpnr]

First off, did 67 GTOs have a N center section, seeing as how Birds used the same ones as GTOs.
Next is, when was the switch from the round tube of 68 changed to the flat spot for 69 birds. Roughly when was the date split, between late RA II and early RA IV rears.
Did some early 69 RA cars get late 68 round tube rears?

[roundportponchos]

I checked the date on 5/69 build 69 convt, : "N" ZK #107 cast, 3/69 date
On the TA, build date 8/69, it has a ZK, "N" #124 cast, 6/69 date

The #124, must have been used later in the year.
Anyone else run accross this part#?

Originally Posted by A Schab

I have a 9795107 cast 3 of 69 ZK 3.90 in an 08E R/A IV T/A.

[phoenixpnr]

Great, so 68 is 9793020
Early 69 is 9795107
Late 69 is 9795124

Where was the split between the two in 69?

Is there such a thing as a late 68 or early 9793020 69 rear?

What is the 67 N housing #?

[roundportponchos]

On 69 "N" bird rear, I would say, mar. 69, might be the last date for #107. The #124 took it from there, but that is just my guess based on what I have here for part #s & dates.

[f-bodynut]

The 67 Firebird Nodular housings were used on factory equipped 3.36, 3.55, and 3.90 posi rears. The 3.36 and 3.55 open rears jut used regular cast housings, 3.90 was available as posi only, no 67 bird left the factory with 4.33's although 4.33's were available over the parts counter. Those nodular rears also got different stronger axles as confirmed by the parts books. The cast number on the 67 bird nodular rears was 9788647 and dates will be in the format of a number that represents the day of the year unlike the regular cast housing that use the date format of a letter for month followed by numbers for day and year. The nodular housing will have the large N on the pinion snout. It will have the two ears like the GTO rear as the bird was rushed into production and actually used the same one as used by GTO. All 67 bird rears have brackets for both traction bars regardless of how many bars the car actually got. I attached some pictures of an original 3.55 and 3.90 nodulars from 67 birds.