Speedo reducer what's it for

**hiperf406** · #1 10-19-2019, 02:39 AM

Are these also used on the automatic cars, mine came with 4:10 gears but someone put in 3:73 gears. If I return to the factory gears I will have to get a reducer.Thanks

**WILMASBOYL78** · #2 10-19-2019, 11:33 AM

Quote:

Originally Posted by hiperf406

Are these also used on the automatic cars, mine came with 4:10 gears but someone put in 3:73 gears. If I return to the factory gears I will have to get a reducer.Thanks

Yes auto cars got these as well.

**YENKO DEUCE REGISTRY** · #3 10-21-2019, 06:21 PM

The Yenko Deuce Novas also received them, specifically the round style that has a superceded part # 1565208 with a 1 : .833 ratio for the 4.10 gears.

x33rs · #4 10-22-2019, 02:48 AM

I have a rounded version with .6481 stamped on it. I pulled it from the same car I pulled a BX code 4.88 rear from.

I've never been able to accurately cross that gear reducer number to anything but it does work accurately with that rearend.

**luv2sixty9** · #5 11-19-2019, 10:34 PM

Quote:

Originally Posted by YENKO DEUCE REGISTRY

The Yenko Deuce Novas also received them, specifically the round style that has a superceded part # 1565208 with a 1 : .833 ratio for the 4.10 gears.

The round reducer with 1:.833 is #6477965

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