im looking for a master rebuild kit through sonnax,is it true there'* no difference between HD,and non -HD 4t60E,except for shift kit,but i have a perf shift switch on my console ? would a higher stall converter help for street?strip,i haven't went with a hiigher duration cam yet,but i am installing roller rockers soon.

Don't think there is a master rebuild kit with the Sonnax package already included. You have to get a rebuild kit (shop around...different kits use different materials for clutch disks), Sonnax package, and trans lube.

Major difference betwen HD and non-HD is the differential and associated housing. There are rumors that the HD case itself is made from a different alloy though. Oh, and drive axles are different too (though that depends on the ratio you have in that trans)

Please continue in your other directly-related topic instead of cluttering up the 92-99 Forum with multiple topics about the same thing.

Thanks!