I have a 1979 f350 with a 460 motor. Not sure what transmission would have been used but wondering what type of fluid I should use in the transmission.

 

Automatic correct? It would be a C6. Use ATF transmission fluid.

Later, Shortbox4x4

 

Thats funny, dont care who ya are......

 

Pull the dipstick and see what is printed on it. It may say Mercon or type F. There was a messy production break right around '79.

 

Most likely "Dex-Merc" ATF which is readily available.

https://www.walmart.com/ip/Valvoline...1-gal/15125788

 

Will do, that was what I wanted to know dextron or Merc. I will pull the dipstick and see. It is an automatic transmission. Thanks!

 

Check the dipstick; M2C138CJ=DEX/MERC; M2C33F= F TYPE. Ford changed around 1976 (C-6 trans). Yours should be DEX/MERC.

 

Perfect, that's exactly what is on dip stick. I will use dex/Merc....thanks for speedy help guys!

 

TYPE F: 1966/75 C4/C6.

MERCON (aka Dexron II): 1976 and later C4/C6.

 

My '78 F150 (with a 400 that must have been a replacement since it has a '76 emissions tag) says Type F, my '79 F350 Mecron. Hence why I said messy.

 

OK so I'm confused. My '77 owners manual says type F but the distick says ESP-M2C138-CJ OIL and from what I can find on line that is suppose to be DexronIII?

When we drained the tranny fluid and put a new filter in we put in type F. Should I change it to DexronIII?

Thanks, Shortbox4x4

 

What does the parts catalog say?

 

I don't know what year your engine & trans are but my 1979 owners manual says:


C6 Automatic Transmission- Use fluid that meets Ford specification ESP-M2C138-CJ or Dexron II series D fluid, or equivalent.

 

My truck is a '77 F150 4x4.

So from what I gather than it's Dexron II.

I'll drain and flush it and refill etc....

Thanks!

 

Read this before you go through the trouble...

https://www.ford-trucks.com/forums/9...-question.html

I wouldn't be too concerned.