Sonnax 73840-27K Oversized Line Modulator Valve Kit for Ford CD4E and Mazda LA4A-EL

The Sonnax 73840-27K oversized line modulator valve kit is designed to restore hydraulic integrity in Ford CD4E and Mazda LA4A-EL transmissions experiencing line modulator bore wear. This wear reduces TV oil pressure working on the main regulator valve to boost line pressure, resulting in lower maximum line pressure in Reverse and Drive.

Addresses Common Transmission Problems:

• Longer, soft shifts under heavier throttle conditions
• Flare on 1-2 shift due to reduced line pressure
• Reduced oil pressure supplied to 2-4 accumulator and servo apply
• Harsh shifts caused by valve not stroking open to control pressure
• Erratic shifts and low line rise issues

Key Features:

• Oversized valve design allows bore refurbishment and restoration of proper hydraulic function
• Annular grooves reduce bore wear caused by side loading
• Restores proper line and TV/EPC pressure control
• Professional-grade solution for worn valve body bores

Note: Installation requires Sonnax F-73840-TL27 tool kit (sold separately) and VB-FIX self-aligning valve body reaming fixture for proper bore preparation.