Sonnax, Superior, Transgo

Valve Body Checkballs – Set of 10 This set includes 10 high-performance checkballs (.250" size) made from durable, wear-resistant imidized plastic....

CRANKSHAFT SPACE 6 HOLE 4R44E, 4R55E, 5R44E, 5R55E, A4LD The crankshaft spacer in A4LD, 4R44E and 5R55E applications is prone to cracking and wear ...

SHIFT KIT Valve Body Repair Kit For 44R55E 5R55E 4R44E 5R44E This comprehensive SHIFT KIT Valve Body Repair Kit is designed for all 4R55E 5R55E 4R4...

Shift Kit Superior 4R44E 4R55E 5R44E 5R55E Modifications made in this Correction Package will allow the use of the less expensive EPC. Solenoid if...

Boost Valve Kit 4R44E, 4R55E, 5R44E, 5R55E From Sonnax Ford 4R44E, 4R55E, 5R44E, and 5R55E units are often plagued by issues such as soft shifts, d...