Ford has tidal waves throughout the Mustang modding realm this week, issuing a new Technical Service Bulletin (TSB) to dealers that essentially says, “If an owner has modified their 2011-2012 Mustang 5.0 drivetrain, their warranty is void”.
TSB 11-7-7 warns Ford Service Departments that when servicing 2011-2012 Mustangs with the new 5.0 litre engine, to look for modifications the owner may have made before covering a list of engine and drivetrain failures.
The new 5.0 litre 32V DOHC Coyote engine has been widely received as one of the best new engines Ford has ever produced. But what a lot of shade tree mechanics don’t know or overlook is that this high compression engine is near maxed out structurally at is factory specified power output.
The TSB warms that common modifications done by a lot of owners that increase the power output can cause premature failure of not only a number of engine components, but drivetrain systems like clutch and gears.
Ford has been in the business of encouraging its owners to customise their cars in the past decade, in fact even offering a raft of products though their dealers to do just that. But the company is sending out a warning shot that they will be voiding warranties if it is determined that modifications made by the owner are the cause of failures.