One 2 fl oz (59.2 mL) tube of Lubegard Instant Shudder Fixx automatic transmission fluid additive, part GA6809. Lubegard specifies it for compatible conventional and synthetic automatic transmission fluids.

For classic Defender 4.0 V8 models with a ZF 4HP22 automatic transmission using compatible ATF. Confirm the gearbox and fluid specification before use. Follow the product label for application. Investigate persistent shudder before replacing parts or adding more treatment.