73-87chevytrucks.com

73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Rear Drivelines, Drive Axles and Gearing => Topic started by: Johno on May 08, 2020, 10:50:46 AM

Title: RING GEAR RECOMENDATIONS 78 C20 14 BOLT FULL FLOATER
Post by: Johno on May 08, 2020, 10:50:46 AM
Have to rebuild diff has a 410 gear ratio now
Title: Re: RING GEAR RECOMENDATIONS 78 C20 14 BOLT FULL FLOATER
Post by: VileZambonie on May 08, 2020, 10:56:43 AM
It's not clear what you are asking for. Are you looking to change ratio's? Brand? What's wrong with yours?
Title: Re: RING GEAR RECOMENDATIONS 78 C20 14 BOLT FULL FLOATER
Post by: zieg85 on May 08, 2020, 11:19:03 AM
Have to rebuild diff has a 410 gear ratio now

The short answer is depends.  C20 assumes it is a 2 wheel drive.  What size tires?  What do you typically tow with it?  What transmission do you have?  What engine do you have and how healthy is it?  4.10 doesn't like highway speeds, subtle changes won't do much but effect tow-ability.  If you are looking for gas mileage even the highest gear you can find may hurt you if your engine is tired or not running right...My $.02
Title: Re: RING GEAR RECOMENDATIONS 78 C20 14 BOLT FULL FLOATER
Post by: Johno on May 09, 2020, 05:58:01 PM
Ring gear is rusted and pitted in areas been sitting awhile had to clean out axle tubes out,moisture ,low on gear oil i don't know how long it has sat