TH400 Sonnax Heavy Duty Sprag Element 34658-HD

Sonnax Heavy Duty Sprag Element

Genuine Sonnax Heavy Duty Sprag Element for the GM, Chevrolet, GMC, Cadillac TH400 automatic transmission. Sonnax parts are the aftermarket standard for transmission repair and performance, engineered to correct common failure points and add durability beyond the original design.

Fitment

Fits TH400 units. Sonnax part number 34658-HD.

Why Sonnax

Trusted by professional builders and performance shops, Sonnax components are made in the USA to exacting tolerances. This is a direct-fit upgrade for a TH400 rebuild or repair.

Shipping & Support

Fast shipping and knowledgeable support on every TH400 order.