Routing traffic with source IP

So here is my scenario. I have multiple partitions on my F5, each one represents a network. In my scenario I have a VIP on partition A and pool members are also in partition A. A requirement popped up to include new pool members that are not in partition A (lets say partition B). I know I can route the traffic to partition B with some automapping (maybe a snat), no worries.

My issues is that if I enable the automap for the routing then I will not have the source IP from the client visible when traffic is routed to the pool member.

Is there a way to route the traffic to the pool members (in different partitions) and have the source IP visible to the pool member.