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What Speedo Gear?

Started by bordin34, October 01, 2009, 08:03:01 PM

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bordin34

October 01, 2009, 08:03:01 PM
What speedo gear would be the proper one for my Charger. I have a 727 to a 2.45 rear and 255/60-15 tires. The one I have now is way off.

1973 SE Brougham Black 4̶0̶0̶  440 Auto.
1967 Coronet Black 440 Auto
1974 SE Brougham Blue 318 Auto- Sold to a guy in Croatia
1974 Valiant Green 318 Auto - Sold to a guy in Louisiana
Mahwah,NJ

BBKNARF

#1
October 01, 2009, 08:49:52 PM
Try going on ebay theres a guy that sells pinion gears, type in (speedometer pinion gears mopar) he also has a chart to find out what gear you need.
68 Charger, slowly in the works, 451 c.i. approx. 535 hp @ the flywheel, so far best time in the 1/4
11.21 @ 119 mph, full exhaust, stock suspension, 4:10s @ 3640 pounds.

bordin34

#2
October 01, 2009, 09:13:51 PM
My only problem with that is the chart only goes down to 2.76 rear gears not 2.45.
Edit- From extending the Chart it seems that I would need about a 25 or 24 tooth gear.

1973 SE Brougham Black 4̶0̶0̶  440 Auto.
1967 Coronet Black 440 Auto
1974 SE Brougham Blue 318 Auto- Sold to a guy in Croatia
1974 Valiant Green 318 Auto - Sold to a guy in Louisiana
Mahwah,NJ

Nacho-RT74

#3
October 01, 2009, 11:19:02 PM
24

well really is 23.75, but rounding up
Venezuelan RT 74 400 4bbl, 727, 8.75 3.23 open. Now stroked with 440 crank and 3.55 SG. Here is the History and how is actually: http://www.dodgecharger.com/forum/index.php/topic,7603.0/all.html
http://www.dodgecharger.com/forum/index.php/topic,25060.0.html

GreenMachine

#4
October 02, 2009, 11:25:45 AM
  Make sure you have the right housing for that gear. Typical housings only work with 26-45 tooth gears.
If it ain't broke, fix it 'till it is.

Runner

#5
October 02, 2009, 04:37:54 PM
i love this calculator    http://tciauto.com/Products/TechInfo/speedo_gears.asp   use 13 for the # of Drive Teeth

71 roadrunner 452 e heads  11.35@119 mph owned sence 1984
72 panther pink satellite sebring plus 383 727
68 satellite 383 4 speed  13.80 @ 102 mph  my daily driver
69 superbee clone 440    daughters car
72 dodge dart swinger slant six
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