WANTED 1977 33-35 tooth speedometer gear

[VolareDave]

My mechanic has done a lot of upgrades to my 1977 Volare Premier.My speedometer is about 10 mph off.He has told me that it will only fit a 77 or 78.It supposedly only on 1977 and some 1978 F-Bodies.The gear looks kind of like a hole saw.The one we saw on ebay was made out of plastic.There are two other that have the gear and metal rods.I hope I have left enough information,if not contact me and I will try to answer your questions

 

[volare 77]

the original gears for 77 are all plastic. the earlier gears have the metal rod. this is what it should look like. is the housing that holds the gear plastic? http://www.ebay.com/itm/NOS-OEM-Mopa...BYC~G2&vxp=mtr

I will see if I have a 33 or 35 tooth gear.

 

[volare 77]

All I can find right now are 27 28 and 31 tooth gears. I may have others but I couldn`t locate them at this time.

 

[volare 77]

what number tooth gear is in your car now?

 

[slant6billy]

OK, here is what the typical F body 76-80 and M/Js late 70 to 89:

That black housing is plastic and there is a rare red housing.

What you need is a cable for an early 70s mopar from NAPA. You need athe aluminum housing with the threaded male end like this :

You got options and selection with the second picture set up. You will die waiting to find a plastic red housing and snap ring gear for a stock f body set up. You need about a 68 inch speedo cable from NAPA

 

[volare 77]

Unfortunately that cable does not work on the 77 volare. The speedo head uses a different set up. The only year cable that will work is a 76 f body cable. My 77 had the red/orange housing and I changed it over to the 76 volare set up. If he has a 25-26 tooth gear in his he may be able to use the 31 tooth gear. It is usually about 2-3 mph per tooth from my experience. Plus it is a lot cheaper and easier to just stick in a new gear then changing the whole set up.

 

[slant6billy]

Unfortunately that cable does not work on the 77 volare. The speedo head uses a different set up. The only year cable that will work is a 76 f body cable. My 77 had the red/orange housing.

Do you mean where the cable attaches to the back of the speedometer? In my second picture, the white cylinder with the tooth latch is the only type I've seen on mopars. I know there are other types much earlier and later, but we just pulled a 73 cluster out of a charger and it had the white cylinder style clip (tooth). Something else might be going on. Do you have cruise control?

 

[volare 77]

The back of the speedo housing has a spring clip on it and the cable design it different.

 

[volare 77]

No, no cruise control. The 77 and 76 had the same type cable end at the speedo.

 

[slant6billy]

The back of the speedo housing has a spring clip on it and the cable design it different.

Do you have a picture of it? I think I have one I thought was GM?

 

[volare 77]

i can take a picture of it. don`t have one on my computer though. trust me, i think they only used it two years. here is a pic of a ebay cable Nos Mopar 1977-78 Lebaron,Diplomat,Aspen,Volare speedometer cable | eBay

 

[volare 77]

BTW, that is a speed control cable but the end that goes to the speedo is the same

 

[marty mopar]

4028933 yellow
4029934 green
4028935 orange

these are the 77 Mopar speedo gears 33-35 teeth


last 2 digits indicate # of teeth


I have the last two NOS

4028657 is the adapter for gears 26 to 45 teeth

I have that NOS too

 

[F body Deconstructor Jim]

two different speedo cable ends...on the speedo end of the cable...
one latches onto the speedo head...
the other is held in place by a spring clip screwed onto the back of the housing the speedo/cluster is attached to.
speedo head is the same, just the cable attachment changed.

 

[shadango]

OK, here is what the typical F body 76-80 and M/Js late 70 to 89:View attachment 18934
That black housing is plastic and there is a rare red housing.

It looks like we may have the red housing...."rare" as in a problem or "rare" as in worth its weight in gold? LOL

 

[volare 77]

My 77 had the red housing. I don`t think it is that rare.