Can you post a pic? I find it common for the lower track to leak between the track and the shower pan. I clean the surfaces real good, wipe down with denatured alcohol. Then I run a bead of clear silicone, and then make a finger wet and force it into the gap. Do this on both sides.
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.