what type of transmission oil should I use for my 91 f150 5.8l 4 speed automatic?
170

Asked by Soto Mar 04, 2015 at 05:29 PM about the 1991 Ford F-150 XLT Lariat Extended Cab LB

Question type: Maintenance & Repair

7 Answers
157,475

Bob answered 9 years ago

I think it says on the dipstick.

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170

Soto answered 9 years ago

hi guys you are right it says to use the mercron. can i also use the dex merc?

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FordNut answered 9 years ago

http://www.oreillyauto.com/site/c/search/Automatic+Transmission+Fluid+-+Vehicle+Specific/04196/C0207.oap?year=1991&make=Ford&model=F-150&vi=5005966 ...says you can

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157,475

Bob answered 9 years ago

Type F hasn't been used recently. They used to use it in some of the older Ford power steering applications.

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