Do 'em both, they are not expensive from NAPA and carry a lifetime warranty. If one is gone, the other is close on its heels. Same fluid, after all...
Avoid AutoZone, et. al.


-Bill
'87 4Runner w/ '96 5VZ-FE, 'Red Chili II'
'97 Taco XtraCab 3RZ-FE, 'BlackBean'
TLCA # 13257, Rising Sun 4x4 Club Land Use Coordinator
"He who stops being better stops being good." -Oliver Cromwell