Kwikee , a division of Power gear , now owned by Lippert ( LCI ) .
If you don't have a manual the LCI site has them as free pdf downloads ; to confirm fluid type; or you can look for them at this site .
Most times the fluid reservoir is attached to the pump and distribution manifold .
Have you located the pump ?
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.