Transfer case: ATF or Gear oil? Also a transmission capacity question.
Apr 11, 2017 | 08:16 AM
#1
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Transfer case: ATF or Gear oil? Also a transmission capacity question.
Hey, I've got a 1986 4x4 SR5 (Manual 5 spd) that I've been doing a bunch of preventative maintenance on. I'm currently changing all the fluids but have a few questions about transfer case and transmission oils.
Transfer Case: I'm not sure what to put in here. The Toyota dealer and the folks at NAPA said Dexron II ATF, but AMSOIL suggests 75w-90 gear oil. I haven't been able to find information on the transfer case in the owners manual I have, and I don't have a factory service manual. I don't want to put the wrong thing in. Seems strange that a manual transmission would want ATF. Which should I use?
Transmission: I chose to go with AMSOIL 75w-90 gear oil and bought 3 quarts as the listed capacity for the transmission is 2.5 quarts. I drained the transmission, replaced the drain plug and begin filling, but after putting 3 quarts in, nothing has come out of the fill hole. If I stick my pinky in I can feel oil right near the top of the hole. What's going on here? Why would it need more than the stated capacity?
Thanks,
Loren
Transfer Case: I'm not sure what to put in here. The Toyota dealer and the folks at NAPA said Dexron II ATF, but AMSOIL suggests 75w-90 gear oil. I haven't been able to find information on the transfer case in the owners manual I have, and I don't have a factory service manual. I don't want to put the wrong thing in. Seems strange that a manual transmission would want ATF. Which should I use?
Transmission: I chose to go with AMSOIL 75w-90 gear oil and bought 3 quarts as the listed capacity for the transmission is 2.5 quarts. I drained the transmission, replaced the drain plug and begin filling, but after putting 3 quarts in, nothing has come out of the fill hole. If I stick my pinky in I can feel oil right near the top of the hole. What's going on here? Why would it need more than the stated capacity?
Thanks,
Loren
Apr 11, 2017 | 09:45 AM
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From: Northern Colorado
Don't know which transmission you have, but the R150F requires 3.0 liters which is about 3.3 qts., so at 3 qts you would expect to be slightly below the fill hole.
Definitely use 75W-90 gear oil, not ATF. Also, GL-4 will make for smoother shifts than GL-5. GL-5 won't hurt it, but it's too slick for the synchronizers to grab properly, making for hard shifting. Same goes for the Tcase.
Definitely use 75W-90 gear oil, not ATF. Also, GL-4 will make for smoother shifts than GL-5. GL-5 won't hurt it, but it's too slick for the synchronizers to grab properly, making for hard shifting. Same goes for the Tcase.
