68RFE Smart-Tech® Overdrive Clutch Housing Kit
Get 20% more clutch capacity and keep hardworking trucks on the road.
48RE Converted Valve Body
Discover the breakthrough solution to the 48RE valve body shortage!
Chrysler RFE Line Pressure Booster Kit
Progressive pressure increase as driving conditions become more demanding.
Mustang 1350 Flange Yoke
Upgrades driveline; lowers build cost. No adapter required!
The Sure Cure® Kit
Watch the Vacuum Testing Videos from Sonnax
Line Pressure Booster Kits
Affordable kit for big performance without a big price tag.
The first step in correcting common shift problems.
The Sure Cure®
Comprehensive kit for big problems you don't want back.
The best parts for performance & heavy duty recalibration.