ZF Flushing - cooler thread sizes.

[B92 8NW]

Does anyone know the thread sizes on a late D1 Tdi transmission cooler? I'd like to remove the cooler and thread on two lengths of hose in lieu to do a flush (I'm aware of another method entailing emptying the return into a bucket, refilling, start engine etc but I'd rather suck straight out of a new drum of fluid and dump into an empty in one smooth process.)

Due to using several different LR repairers there's a shandy of Transmax Z, Penrite BMV and generic ATF in there. I think a flush is the only way to be sure all of the old fluid(s) are removed.

[steveG]

From memory the pipes have just a b-nut onto the cooler, and the pipe itself has a bead and an o-ring on it.
You should be able to just remove the nuts from the cooler, pull the pipes out, remove the o-rings and slide a bit of hose over.
Make sure you've got some new o-rings for when you refit it as the old ones will likely be deformed.

Steve