It could mean that you have worn seals or gaskets.
Luckily, Omix-ADA has you covered with our 42RLE automatic transmission rebuild kit for 03-13 Jeep Liberty and 03-11 Jeep Wrangler..07 This kit includes rubber and cork gaskets, sealing rings, oil seals, micro filter, springs, and seal retainers.Is your transmission slipping or have you noticed that it is leaking? 07-11 Wrangler JK 2 & 4 Door;03-06 Wrangler TJ/LJ;03-12 Liberty;Models with 42RLE automatic transmission;Kit includes rubber and cork gaskets, sealing rings, oil seals, micro filter, springs and seal retainers;Factory style replacement part;California Residents: WARNING Omix-ADA 42RLE Transmission Rebuild Kit - 19001.