The 6 speed boxes have hard lines already that can be cut into for fitting a gearbox oil cooler, but the 5 speed sadly doesn't have anything similar.

Has anyone seen / fitted a trans cooler to a 5 speed box? I've tried google, but not really found anything.

For track work, I think it might help with temps (in fact, I don't think almost anybody even monitors these, so who knows how hot the gearbox gets...).


I'm not 100% keen on drilling into the casing to fit a take off, especially as the box is already in the car, so was thinking of maybe drilling/tapping the sump plug and having a banjo connection there, and maybe piping the oil back into the filler neck. Obviously would also need an external electronic pump of some sort, but I'm sure that can be found somewhere.


Any thoughts? Perhaps step 1 is to actually monitor the temp to see if it's an issue in the first place.