Are the speedos for 1977 f150 an 85 or 100 mph unit? I was thinking they are 100, but looking at a used truck, the owner says the 85 mph is the original (of course low mileage) speedometer.

 

I believe the 85 mph speedometer was a mid-year change in '77.
Another thing to remember, these odometers only register up to 99,999.9 then go to 0 and start over. That "low mileage" could be +100 or even 200,000 miles, personally my truck shows 35,000+ miles but in reality it's 435,000+miles!

EDIT: I checked the parts catalog. It doesn't give a s/n breakdown but it shows that the 100MPH speedo was used from 73-77, then the 85MPH was used from 77-79 so it was a mid year change for '77.

 

I have a "late" '77 (Y60,xxx S/N) F250. It has the stock cluster in it which reads 0-100mph. Factory did some odd stuff with extra stock!

I saw a post where people had to modify 0-100mph clusters to get the high-beam light in the correct position - mine is at the top of the speedometer where it's supposed to be, and I always assumed it was normal. Is this something weird/rare?

-Brad

 

This is mine, and thats the first time around on the mileage.

 

The earlier (73-74) 100MPH speedometers didn't have the high beam jewel in the speedometer head. The high beam jewel was off to the right side of the cluster and said "HI BEAM" and it was red not blue.

 

Thanks guys! I am not going to let it bother me as long as I know there is a reasonable chance that it is original.There really isn`t much concern as the truck is a full resto with good documentation. I just had some doubt because I thought all 77 trucks still had the 100 mph units. As is proven here with other members experience, it was a mid-year running change.

 

Just to add a 100mph face w/hi-beam.

 

Just addin' fuel to the fire, eh?.

 

OldStyle, would you sell that 100 mph speedo face?? Popa John

 

I don't know about selling it? They are pretty common and I could get another. The cost would be in the shipping to Belgium. You cover that and I would be happy to package it up safely and send it.

.

 

@ OldStyle, I am not in Belgium. I'm up here in Canada. To be a little more specific.... Cranbrook. Ontario, about an hour east of Lake Huron, Goderich. I will see if I can add Ontario, Canada to my address. Can you give me a cost as I have a sister-in-law living in Ephrata PA. Popa John

 

Taken to PM

 

The one in my truck is EXACTLY like the one OldStyle posted.

100mph, hi-beam jewel dead center on top.

 

can you just swap the 100 in place of the 85 or will it read incorrectly?

 

They swap without problem. The difference is in the speedometer head, not the gearing.
Only "issue" is hi beam jewel.