speedometer gears

blackgt50 · 09-01-2008, 08:20 PM

I need to know what the factory speedo gear is for auto with a 2.70 rearend gear?any help will be greatly appr.

86GTPONY · 09-01-2008, 08:24 PM

They used a red gear for the 3.08 ratio. I don't know if there's another step from that, though.

blackgt50 · 09-01-2008, 08:30 PM

I bought this car without the tranny and the cable was missing the gear just trying to figure it out.thanks

86GTPONY · 09-01-2008, 08:40 PM

You could use the red gear, just keep in mind that you'll be going a little faster that your speedo says. Probably only a couple - few mph's.

blackgt50 · 09-01-2008, 08:43 PM

Thats probably what I will do until I get another gear thinking about a 4.10 any sugestions

86GTPONY · 09-01-2008, 08:48 PM

Quote:

Originally Posted by blackgt50

Thats probably what I will do until I get another gear thinking about a 4.10 any sugestions

4.10 is a little tall for a stock 5.0 - unless you plan on upgrades soon. I went with the 3.73 and am very happy. With the 3.73's I used a white gear which is said to be used for ratio's between 3.55 & 4.10 - If memory serves me right, a white speedo gear has 21 teeth.

QWKSNKE · 09-01-2008, 08:52 PM

Quote:

Originally Posted by 86GTPONY

4.10 is a little tall for a stock 5.0 - unless you plan on upgrades soon. .

I agree. Your powerband needs at least another 1500 rpm before going to 4.10's

blackgt50 · 09-01-2008, 09:04 PM

I have a e303 cam ,2500 stall,and a 1 inch plenoum spacer . none of it is in stalled yet got it today tradin around

86GTPONY · 09-01-2008, 09:18 PM

4.10's should suit you nicely then. Unless of course you do a lot of highway driving. Get a bigger intake like a Pro-Products, Edelbrock, Trick-flow, etc. and you'll really be happy!

Craig K. · 09-02-2008, 10:19 AM

If you hae a Ford Motosports catalog, it has a table in it that shows all the different speed-o gears (tranmission driven and drive) along with the rear end gear.

I have one at home, so I can post later unless someone beats me to it.

09-01-2008, 08:20 PM	#1
blackgt50 Junior Member Join Date: Jul 2008 Location: kNOXVILLE,TN Posts: 29	speedometer gears I need to know what the factory speedo gear is for auto with a 2.70 rearend gear?any help will be greatly appr. __________________ 90 gt stock with BBK cold air intake,B series Ford Racing cam,flowmasters,and alot more to come!

09-01-2008, 08:24 PM	#2
86GTPONY Gone but not forgotten Join Date: May 2008 Location: 4/08/2013. Went to the man upstairs. RIP Posts: 955	They used a red gear for the 3.08 ratio. I don't know if there's another step from that, though. __________________ *-Don* 86GT (sleeping in the garage for now) 87 T-bird Turbo Coupe (daily driver) 87 Ranger ($100 work truck) Meat is murder!... Tasty, tasty murder.

09-01-2008, 08:30 PM	#3
blackgt50 Junior Member Join Date: Jul 2008 Location: kNOXVILLE,TN Posts: 29	I bought this car without the tranny and the cable was missing the gear just trying to figure it out.thanks __________________ 90 gt stock with BBK cold air intake,B series Ford Racing cam,flowmasters,and alot more to come!

09-01-2008, 08:40 PM	#4
86GTPONY Gone but not forgotten Join Date: May 2008 Location: 4/08/2013. Went to the man upstairs. RIP Posts: 955	You could use the red gear, just keep in mind that you'll be going a little faster that your speedo says. Probably only a couple - few mph's. __________________ *-Don* 86GT (sleeping in the garage for now) 87 T-bird Turbo Coupe (daily driver) 87 Ranger ($100 work truck) Meat is murder!... Tasty, tasty murder.

09-01-2008, 08:43 PM	#5
blackgt50 Junior Member Join Date: Jul 2008 Location: kNOXVILLE,TN Posts: 29	Thats probably what I will do until I get another gear thinking about a 4.10 any sugestions __________________ 90 gt stock with BBK cold air intake,B series Ford Racing cam,flowmasters,and alot more to come!

09-01-2008, 09:04 PM	#8
blackgt50 Junior Member Join Date: Jul 2008 Location: kNOXVILLE,TN Posts: 29	I have a e303 cam ,2500 stall,and a 1 inch plenoum spacer . none of it is in stalled yet got it today tradin around __________________ 90 gt stock with BBK cold air intake,B series Ford Racing cam,flowmasters,and alot more to come!

09-01-2008, 09:18 PM	#9
86GTPONY Gone but not forgotten Join Date: May 2008 Location: 4/08/2013. Went to the man upstairs. RIP Posts: 955	4.10's should suit you nicely then. Unless of course you do a lot of highway driving. Get a bigger intake like a Pro-Products, Edelbrock, Trick-flow, etc. and you'll really be happy! __________________ *-Don* 86GT (sleeping in the garage for now) 87 T-bird Turbo Coupe (daily driver) 87 Ranger ($100 work truck) Meat is murder!... Tasty, tasty murder.

09-02-2008, 10:19 AM	#10
Craig K. Nothing new here Join Date: Dec 2004 Location: Senoia, GA Posts: 2,990	If you hae a Ford Motosports catalog, it has a table in it that shows all the different speed-o gears (tranmission driven and drive) along with the rear end gear. I have one at home, so I can post later unless someone beats me to it. __________________ 1974 Triumph TR6 1985 Monte Carlo SS 1986 Mustang GT 2011 KIA Optima GTS