I have a P38 Trans Oil cooler in my TD5 Disco 2. My Trans temp switch is cactus.

Part no.s appear to be ESR4329 for diesel, and ESR4330 for Petrol P38s.

Whats the difference? I mean technically, with the part? Do they operate at a different temperature? Did the diesel have a 4hp22 and the petrol the 4hp24? (thus explaining why there might be a temperature difference?)

Which one do I want to put on my Disco?