DWD66VETTE

I have 3.55 gears and the lowest driven gear to fit my trans is 22 tooth.
My speedometer is slow by 6 mph @ 50 mph. I need to put in a reducer to increase the speed of the cable. Can anyone give me the ratio I need and a vendor to get one from.

azmusclecar

here's a start...........

http://www.partshp.com/speedometer_gears.htm


http://www.dandltransmission.com/pdf/t_10.pdf


http://www.stl-vettes.com/65vette/gearcalc.htm

DWD66VETTE

I have a steward warner reducer that has 666F N22 1.2020 stamp on it.
Can any one tell me what this would do on my cable.

66jack

put in a 21 tooth gear...'RED' in color...

3:55 gears with 27 inch tall tires..


http://www.stl-vettes.com/65Vette/GearCalc.htm

azmusclecar

http://classictransmissionsiz.com/1-202

202, meaning it corrects a speedo that is off by 20

DWD66VETTE

The 21 tooth will not fit with my drive gear in my transmission. It's to small o.d. I have red ones to verify.Without taking off to the transmission tail housing and changing the drive gear i need a reducer.

66jack

Forgot about the Drive gear size differences...

mark6669

Try this site they make custom reducers for what ever your needs for $62.
http://www.transmissioncenter.net/sp...tm#Ford_Manual
Mark

DWD66VETTE

Thanks Mark, this is exactly what I needed. The great people on this forum never disappoint me.

DWD66VETTE

Got my reducer and just put it on. Went for a drive and compared my speedometer with my GPS and I'm right on. Thanks for the help everyone.