Superior TH400 Valve Body Kit w/Plate for GM 1965-Up

Enhance shifting performance and reliability in your GM TH400 transmission with this genuine Superior Valve Body Kit with Plate (K400-WP). This complete shift correction package directly addresses the most common valve body problems that cause inconsistent or harsh operation.

The kit supplies a new separator plate to restore proper hydraulic control, a thicker heavy-duty snap ring for the intermediate clutch that even allows use of cases with 2-3 broken lugs, and upgraded metal rings for the 2nd accumulator. Enjoy firmer, positive shifts while eliminating soft late shifts, soft 2-3 shifts, harsh reverse engagement, clutch chatter, and hot bind-up in manual low. Perfect for any 1965-up GM TH400 rebuild – whether in classic cars, trucks, or heavy-duty applications. Simple to install during routine valve body service for immediate improvements in transmission response and longevity.

• Genuine Superior K400-WP shift correction package for TH400 transmissions
• Fixes soft late shifts, soft 2-3 shifts, harsh reverse engagement, and clutch chatter
• Includes new separator plate to replace worn OEM plus heavy-duty intermediate clutch snap ring
• Upgraded metal rings for 2nd accumulator – far more durable than original Teflon
• Prevents bind-up in manual low when hot and protects case lugs from damage
• Works with both 6- and 7-checkball TH400/TH475 valve bodies
• Ideal for stock, towing, or performance rebuilds in all GM Turbo 400 applications