Identifying an R380 clutch slave cylinder - FTC5072/FTC5202

I know pushrods have been done to death, but I'm interested in the slave cylinder perspective.
FTC5072: www.lrworkshop...
FTC5202: www.lrworkshop...
LR Workshop: www.lrworkshop...
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[@YMKnorway]

I believe that the old one have imperial threads on pipe, and the new one to td5 is metric.

[@petermenzies1714]

Another valuable piece of research & information. I Frequently see posts with clutch issues after fitting new slave cylinder, this should remove some of the mystery.

[@jamieaustin6403]

I had an issue when i built my Td5 110... i bought what i thought was a Td5 slave, but it turned out to be a 300tdi. The piston had a slightly shallower hole in the end (td5 was deeper) which gave the effect of continously applying a bit of pressure on the hydraulics, and thus the cover plate wasnt clamping fully on the clutch plate. Meaning it kept slipping, especially when working hard.

[@erictyrrell3560]

Interesting that LR decided the pushrod need more return force.

[@hammyh1165]

Are they interchangeable though and would it work both ways ?

[@adrianaugustus2815]

Yes I'm thinking if the only dimensional difference is the 2mm on depth internally in the piston, it should make very little difference. Earlier cylinder probably a lot easier to fit (because of softer spring). On the otherhand my 300tdi clutch pedal sometimes sticks down so a stronger spring will be better. As long as the rod doesn't pop out trying to refit it!

[@petermenzies1714]

Another valuable piece of research & information. I Frequently see posts with clutch issues after fitting new slave cylinder, this should remove some of the mystery.