Viper Alley - Dodge Viper Forum - View Single Post - How hard and expensive is it to change from 3.55 to 3.73 on Ford F150?

ROGUE GTS · December 17th, 2005, 01:01 AM

Do the new trucks still have the 8.8" rear end? Gears shouldn't run more than $200-250, won't need bearings or seals. $15 in diff lube and limited slip additive, labor is completely shop dependant. I've seen them done on 8.8's by a good mustang shop for $175, up to $350 in labor.

As for the speedo, not sure how they are setup on the new trucks, the 97-03? had a gear on the sensor you could change to correct them.

Why not just have the dealer swap the gears, and/or whole rear axle for the setup you want? Droping another $600 on a $50 upgrade is kinda silly unless your already getting an awesome deal.

December 17th, 2005, 01:01 AM	#2
ROGUE GTS Suspended ROGUE GTS is offline Join Date: Nov 2005 Location: SoCal Posts: 2,518 Rep Power: 0	Re: How hard and expensive is it to change from 3.55 to 3.73 on Ford F150? Do the new trucks still have the 8.8" rear end? Gears shouldn't run more than $200-250, won't need bearings or seals. $15 in diff lube and limited slip additive, labor is completely shop dependant. I've seen them done on 8.8's by a good mustang shop for $175, up to $350 in labor. As for the speedo, not sure how they are setup on the new trucks, the 97-03? had a gear on the sensor you could change to correct them. Why not just have the dealer swap the gears, and/or whole rear axle for the setup you want? Droping another $600 on a $50 upgrade is kinda silly unless your already getting an awesome deal.