777-0558 or 7770558 is a Fabco spring with a .734x.61 size call-out, a genuine Fabco part from Pro Gear and Transmission. Its catalog name carries the FAT30 designation, so check it against your unit before you order.
A spring like this is built to work within set limits and push back with a steady force, which keeps the parts around it doing their job. As one wears it can sag, struggle to return to its original shape, or lose load-carrying ability, and a tired spring can load the neighboring parts unevenly. Call us to confirm proper fit for your application.
Features
Fabco spring, part number 777-0558 or 7770558
Size call-out .734x.61
Catalog name carries the FAT30 designation
A genuine Fabco part sold by Pro Gear and Transmission
Works within set limits to keep a steady force on the parts around it
Sagging or lost load-carrying ability is the usual sign it is due for replacement
