WTB early 2002 Long neck 3.64 diff

[Guest bmw908]

Hey everyone hope you guys can come through and help me find a long neck 3.64diff from a early 2002 not a 4.11 diff from a 1600

[zeedub567]

On 2/18/2021 at 7:38 AM, Nj1602 said:

Hey everyone hope you guys can come through and help me find a long neck 3.64diff from a early 2002 not a 4.11 diff from a 1600

I got deez two boys. I will let you know if they are early or not i just got em. Ill ask the old owner or is there a year stamp on em like engine blocks have?

[RichenFamous]

@zeedub567

Long neck diff:

(Pic pilffed from this here forum)

Edited February 21, 2021 by RichenFamous

[Conserv]

On 2/20/2021 at 2:06 AM, zeedub567 said:

... is there a year stamp on em like engine blocks have?

 

Yep, mostly! But not always. And since some differentials have had their innards swapped, the only foolproof way to know precisely what you have is to count the teeth on the ring and pinion. Short-necks, however, like these two, date from early 1969 onward. They replaced the long-neck version shown by @Richenfamous, which were phased out of new ‘02’s in January and February 1969. And a short-neck differential with “four-bolt” side covers dates from 1969 through 1978.

 

Separate and apart from the differential housing — but also readily swapped — the rear differential covers dependably have casting dates, viewable only when the cover is removed, although the multiple ribs at the bottom of your right differential’s rear cover generally announce a “square taillight era” rear cover.

 

Here’s a thread on identifying your differentials without opening them up. It probably works 90% of the time:

 

 

Regards,

 

Steve