GM Performance Transmissions Please choose product options by visiting GM Turbo 400 Performance Transmission Level 4. Showing 33–34 of 34 results Default sorting Sort by popularity Sort by average rating Sort by latest Sort by price: low to high Sort by price: high to low GM Turbo 400 Performance Transmission Level 4 $5,995.00 -Select options Powerglide $6,000.00 -Add to cart ← 1 2 3 ← Home → Transmissions – old