Found: Speedo

[MildSeven]

Mine doesn't return to 0

 

Not sure what specs are needed but I have a '76 and I believe I have a 3.64 diff.

 

thanks,

Anthony

 

 

Edited May 9, 2017 by MildSeven

[HBChris]

I have a speedo stamped 6/76, w=1.30, interested?  Asking $35 plus shipping the trip meter resets to zero but I have never driven with this speedo, it shows 33K miles.

[MildSeven]

thanks for the reply.

 

Excuse my lack of knowledge but what does W=1.30 signify? Odometer aside does the speedometer function?

Edited September 13, 2016 by MildSeven

[Conserv]

I believe both W=1.28 and W=1.30 speedometers were for 3.64 diffs.  My '76's W=1.393 was SUPPOSED to be for the 3.90 differential fitted solely to 49-state U.S.-spec '76 cars (different ring and pinion from the e21 3.91).  But there was a mistake at the factory and many of the 1.393-marked '76 speedos were actually geared for 3.64 differentials.  The factory fix is/was a speedometer face overlay, which corrects the approximately 7% error.  I've been looking for one of these overlays for years.

 

Consequently, if you buy a 1976 speedometer, and it's marked W=1.393, it might be for a 3.90 or a 3.64 differential, depending on whether it's a correctly geared unit, or one of the many errors, like mine!

 

Regards,

 

Steve

 

 

 

Edited September 13, 2016 by Conserv

[kbmb02]

I've got a bunch, Steve - if you've got a photo of the overlay (or, a description of what to look for), I'll dig around. -KB

[HBChris]

I took mine out of the housing, looks like it may not be working, sorry.

[MildSeven]

 

15 hours ago, Conserv said:

I believe both W=1.28 and W=1.30 speedometers were for 3.64 diffs.  My '76's W=1.393 was SUPPOSED to be for the 3.90 differential fitted solely to 49-state U.S.-spec '76 cars (different ring and pinion from the e21 3.91).  But there was a mistake at the factory and many of the 1.393-marked '76 speedos were actually geared for 3.64 differentials.  The factory fix is/was a speedometer face overlay, which corrects the approximately 7% error.  I've been looking for one of these overlays for years.

 

Consequently, if you buy a 1976 speedometer, and it's marked W=1.393, it might be for a 3.90 or a 3.64 differential, depending on whether it's a correctly geared unit, or one of the many errors, like mine!

 

Regards,

 

Steve

 

thanks for the explanation!

 

15 hours ago, HBChris said:

I took mine out of the housing, looks like it may not be working, sorry.

 

no problem, thanks for the reply.

 

 

 

still looking

[Conserv]

And virtually all 1974-1975 U.S. speedometers are geared for a 3.64 differential, as well as all 1976 California-only speedometers.

 

Of course, North Hollywood Speedometer, and many others, could probably fix yours -- it's likely, however, to be more expensive than a good used unit.

 

Good luck,

 

Steve