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NEW! Optimized for Powerglide® performance applications,
NEW! Optimized for Powerglide® performance applications, Smart-Tech 10-clutch drum kit 28756-25K features Sonnaxs oversized piston delivering 35% mor...

NEW! Designed for 5” aluminum driveshafts with .125” wall
NEW! Designed for 5” aluminum driveshafts with .125” wall tubing and 1550 series U-joints, Sonnax T55-28-5012 high-strength, aluminum weld yokes a...

NEW! Designed for 4 aluminum driveshafts with .125 wall tubing and
NEW! Designed for 4 aluminum driveshafts with .125 wall tubing and 1410 series U-joints, Sonnax T41-28-4012 aluminum weld yokes are turned from billet...

NEW! Output shaft failure is common in GM 4L60/65/70-E units as
NEW! Output shaft failure is common in GM 4L60/65/70-E units as power levels are increased. Specially heat-treated and processed for maximum strengt...

NEW! Recently featured in the SEMA New Products Showcase, the
NEW! Recently featured in the SEMA New Products Showcase, the innovative Sonnax Powerglide® 1.65 ratio extreme planetary assembly kit 28165G-06 is ba...

NEW! Featuring several advanced design benefits, the high-quality
NEW! Featuring several advanced design benefits, the high-quality Sonnax 2.84 ratio input carrier kit 77284-K changes the 1st & 2nd gear ratios of GM ...

NEW! Vehicles equipped with ’05-later Ford 5R110W Torqshift
NEW! Vehicles equipped with ’05-later Ford 5R110W Torqshift units often exhibit multiple TCC apply issues caused by bore wear at the converter press...