|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
05-31-2021, 12:26 AM | #1 |
Senior Member
Join Date: May 2010
Location: Rathdrum Idaho
Posts: 737
|
1955 Ford speedo driven gear.
Working on a 55 Ford with a Fordomatic and 215/70/15 tires. 3.30 rear end. (approx 26.8 tall) The speedo. over reads. Probably about 7 miles faster. I know it needs a larger driven gear. It has a 19 tooth gear right now. I have no idea about the drive gear. And there is no way to see in the hole. The car appears to be completely stock. I would just like to get the speedo. closer then it is. It don't need to be perfect, just closer. Can I safely put a 21 or 22 tooth driven gear in the hole?
|
05-31-2021, 05:16 AM | #2 |
Senior Member
Join Date: Aug 2012
Location: IN A 'GALAXIE' FAR FAR AWAY
Posts: 6,475
|
Re: 1955 Ford speedo driven gear.
REFERRING THREAD - https://www.fordbarn.com/forum/showt...edometer+gears
__________________
***** - WHY IS IT ... - ... that everything you buy in the grocery store is either wrapped in or contained in plastic but the government doesn't want you to carry it out in a plastic bag? WONDERING IN W(BY GOD)V ...
DIAGNOSED CDO - (OCD In Correct Alphabetical Order) |
Sponsored Links (Register now to hide all advertisements) |
|
05-31-2021, 08:10 PM | #3 |
Senior Member
Join Date: May 2010
Location: Midland Park, NJ
Posts: 3,982
|
Re: 1955 Ford speedo driven gear.
CASCO has 20,21, and 22 tooth gears for 55. The TBirds used an angle drive, but I think the gears will fit a sedan cable. Ask them about this before you buy.
If I remember correctly, on tooth equals about 5 mph
__________________
48 Ford Conv 56 Tbird 54 Ford Victoria Last edited by paul2748; 05-31-2021 at 08:17 PM. |
05-31-2021, 09:42 PM | #4 |
Senior Member
Join Date: May 2010
Location: Granite City, Illinois
Posts: 3,008
|
Re: 1955 Ford speedo driven gear.
I would say it's not a big job to pull out a speedo driven gear from the trans rear extension housing. But you gotta be careful to pull it straight outta the hole. If the nylon gear teeth catch on the hole while you are pulling the cable out, the nylon gear will fall off the end of the cable and down into the bottom of the extension housing.
Never fear! if that happens, you can take a piece of spring-steel wire, (14 or 12 gage would be okay) and bend it into a shape like pliers with two prongs on the end. Poke the ends of the wire (facing down) into the hole and squeeze the pliers together and pick up the gear and pull it out. I've done it several times. BTW, I am using P215-75R15's on the rear of my '55. They are closer in outside diameter to the original 670x15's, so I didn't need to change gears (although it might be a little off), there wasn't another modern tire manufactured at the time that came closer to the original O.D. |
06-01-2021, 08:06 PM | #5 | |
Senior Member
Join Date: May 2010
Location: Rathdrum Idaho
Posts: 737
|
Re: 1955 Ford speedo driven gear.
Quote:
It's not my car. The speedo is about 8 or 9 miles an hour off. (over reading) I did pull the gear out and of course it did come off but didn't drop. I did order a 22 tooth gear. When I re installed the gear I put some grease on it so it wouldn't fall. This car has 215/70/15's. |
|
06-01-2021, 08:16 PM | #6 |
Senior Member
Join Date: Aug 2020
Posts: 442
|
Re: 1955 Ford speedo driven gear.
Sponsored Links (Register now to hide all advertisements)
|
06-02-2021, 12:15 PM | #7 | |
Senior Member
Join Date: May 2010
Location: Rathdrum Idaho
Posts: 737
|
Re: 1955 Ford speedo driven gear.
Quote:
|
|
06-07-2021, 12:18 PM | #8 |
Senior Member
Join Date: May 2010
Location: Rathdrum Idaho
Posts: 737
|
Re: 1955 Ford speedo driven gear.
Put a 22 tooth gear on and speedo. is about dead on.
|
06-08-2021, 12:54 AM | #9 |
Senior Member
Join Date: Nov 2016
Location: Now on the Land of Sun City West, AZ
Posts: 405
|
Re: 1955 Ford speedo driven gear.
Just a bit off topic, 56 Speedometer "Head": I've noticed on a '55 head there was an oiling port on the rear. The '56 does not. Question: do you spray lube inside the male speed cable screw area? My mph needle does not travel back to Zero when I stop.
|
06-08-2021, 10:14 AM | #10 |
Senior Member
Join Date: Aug 2012
Location: Abq, NM
Posts: 3,607
|
Re: 1955 Ford speedo driven gear.
|
06-08-2021, 11:44 AM | #11 | |
Senior Member
Join Date: Aug 2012
Location: IN A 'GALAXIE' FAR FAR AWAY
Posts: 6,475
|
Re: 1955 Ford speedo driven gear.
Quote:
If she doesn't zero after that service, you would need to send it to a repair shop.
__________________
***** - WHY IS IT ... - ... that everything you buy in the grocery store is either wrapped in or contained in plastic but the government doesn't want you to carry it out in a plastic bag? WONDERING IN W(BY GOD)V ...
DIAGNOSED CDO - (OCD In Correct Alphabetical Order) |
|
|
|
Sponsored Links (Register now to hide all advertisements) |
|