ZF FLUID
Life Guard

Use only to cure squawking on 3-4 shift, should be added to LifeGuard 6 fluid only, in accordance with the ZF technical note below.

ZF technical note:

All transmissions built on line 1 with a serial number above 520000, as well as those built on line 2 with a serial number above serial number 4100000 have the later type friction plates fitted and should not be treated with this additive.

This additive should only to be used if squawk is an issue on transmissions with serial number below the cut off numbers listed above. It must only be used once in a transmission, the excetion to this rule is if the transmission has had a complete fluid change.