Could i add Lucas transmission fluid before flushing my trans
It is not recommended to flush a transmission since it will move debris threw crew-shell parts of trany, no matter how well you do it debris will hang up in some nook or cranny. Just change the fluid and filter and add the Lucas treatment with it.
Ditto. Do not flush. Far more harm than benefit
Adding the Lucas fluid before a flush would be wasted money as it would be flushed out along with the old transmission fluid.
Looking for a Used Suburban in your area?
CarGurus has 19,720 nationwide Suburban listings starting at $2,000.
Search Chevrolet Suburban Questions
Chevrolet Suburban Experts
Related Models For Sale
Used Cars For Sale