Sonnax bearing adapter GM-WA-44 has ribs and better support for the associated GM-N-8HLT thrust bearing, providing rebuilders with an improved option when replacing the stator cap in GM TH400, AT-540 and Buick TH350 units. GM-WA-44 along with GM-N-8HLT thrust bearing is 1.065" tall and can be used in place of Sonnax bearing adapter [GM-WA-2].