Mike Tonon
Guest
What is the best oil to use in the TK5 transmission? These, based on what I’ve read, all originally had 80w90 conventional gear oil from the factory. But mine used to be hard to shift when the transmission was cold and the temperature was below about 25 degrees Fahrenheit. So what about something that flowed better or something slightly thinner?
How about this Motorcraft full synthetic 75w90?
https://www.ebay.com/p/Genuine-Ford-Fluid-XT-M5-QS-Full-Synthetic-Manual-Transmission-Fluid-1-Quart/1466980446?iid=323546406068&chn=ps&ul_ref=https%3A%2F%2Frover.ebay.com%2Frover%2F1%2F711-117182-37290-0%2F2%3Fmpre%3Dhttps%253A%252F%252Fwww.ebay.com%252Fp%252FGenuine-Ford-Fluid-XT-M5-QS-Full-Synthetic-Manual-Transmission-Fluid-1-Quart%252F1466980446%253Fiid%253D323546406068%2526chn%253Dps%26itemid%3D323546406068%26targetid%3D483853014227%26device%3Dm%26adtype%3Dpla%26googleloc%3D9003173%26poi%3D%26campaignid%3D1698888467%26adgroupid%3D65736218829%26rlsatarget%3Daud-497631946031%3Apla-483853014227%26abcId%3D1139396%26merchantid%3D8588904%26gclid%3DCj0KCQiAkfriBRD1ARIsAASKsQLSCdnmk2VVuvzgJttDXTUMnE_wYdBoUWvZi1Xv8l9x6mnpcid1k0QaAvtjEALw_wcB%26srcrot%3D711-117182-37290-0%26rvr_id%3D1852582073104%26rvr_ts%3Dd5166f171680aad75e23a8cffff33622
How about this Motorcraft full synthetic 75w90?
https://www.ebay.com/p/Genuine-Ford-Fluid-XT-M5-QS-Full-Synthetic-Manual-Transmission-Fluid-1-Quart/1466980446?iid=323546406068&chn=ps&ul_ref=https%3A%2F%2Frover.ebay.com%2Frover%2F1%2F711-117182-37290-0%2F2%3Fmpre%3Dhttps%253A%252F%252Fwww.ebay.com%252Fp%252FGenuine-Ford-Fluid-XT-M5-QS-Full-Synthetic-Manual-Transmission-Fluid-1-Quart%252F1466980446%253Fiid%253D323546406068%2526chn%253Dps%26itemid%3D323546406068%26targetid%3D483853014227%26device%3Dm%26adtype%3Dpla%26googleloc%3D9003173%26poi%3D%26campaignid%3D1698888467%26adgroupid%3D65736218829%26rlsatarget%3Daud-497631946031%3Apla-483853014227%26abcId%3D1139396%26merchantid%3D8588904%26gclid%3DCj0KCQiAkfriBRD1ARIsAASKsQLSCdnmk2VVuvzgJttDXTUMnE_wYdBoUWvZi1Xv8l9x6mnpcid1k0QaAvtjEALw_wcB%26srcrot%3D711-117182-37290-0%26rvr_id%3D1852582073104%26rvr_ts%3Dd5166f171680aad75e23a8cffff33622
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