The USA Standard Steel Spool for AMC Model 20 with 29-spline axles installs in place of the carrier to provide full-time lockup and 100% traction. Made for dedicated off-road or drag applications rather than street driving, this spool fits Model 20 housings and is compatible with final drive ratios of 3.08 and up, offering a simple mechanical solution for vehicles needing consistent traction under load.
USA Standard Steel Spool For Model 20 w/ 29 Spline Axles / 3.08+