XJ6 & XJ12 Series I, II & III 1968-1992

Automatic Transmission Fluid Series 3

Old 12-28-2011, 12:34 PM
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Default Automatic Transmission Fluid Series 3

Hello , I have a Borg Warner automatic transmission in my 79 Series III XJ6. What modern transmission fluid is a replacement for the Type G specified? All of the recommended lubricants in the shop and owners manual are no longer available. I did have the transmission rebuilt a few years ago and have since experienced spontaneous leakage when the vehicle has been idle for several weeks. The rebuild mechanic said the discharge is overflow from non use. It makes a mess of the garage floor and never occurred prior to the rebuild. When I checked it this week the dip stick indicated the fluid was extremely low. Could the type of fluid be responsible?
Old 12-28-2011, 02:19 PM
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Type "F" or "FA" replaces the old Type "G".

Some use Dexron with good results but the F or FA gives a bit firmer shift

When sitting unused for a few days the fluid all drains down into the pan, essentially over-filling it. The fluids backs up behind seals and gaskets. Any slight weakness in the seals or gaskets...such as shrinkage from lack of use.... will allow the fluid to come out

Very common with the old BW transmissions....and older Ford Cs and C6s as well.

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