Which Dexron? 🤔

Redlevel

Well-known user
Which Dexron is best for a 700R4 trans?

Automatic Transmission Fluids
Dexron Type A, Suffix ASpecification introduced in 1957. It requires the oil to meet certain limits regarding its kinematic viscosity.Dexron IIDGeneral Motors Dexron®-IID Specification. ATF issued in 1975. Contained ATF cooler corrosion requirements not listed in Dexron® - II.Dexron IIEGeneral Motors Specification Dexron®-IIE. ATF issued in 1991 requiring improved low temperature performance compared to Dexron®-IID, 20 000 cP at minus 40 °C.Dexron IIIFGM specification for Automatic transmission oil introduced in 1994. Successor of Dexron IID and IIE.Dexron IIIGSuccessor of Dexron III(F) automatic transmission fluid. This has the same low temperature characteristics as Dexron IIE, but with modifications to anti-oxidancy and friction material. Introduced in 1997.Dexron IIIHDexron III licence H was introduced in June 2003 to replace the Dexron III G fluid. It has an oxidatively stable base oil (group 2 or group 3). Oils according to this specification have longer maintenance of friction properties and anti-shrudder properties, better foam control and a longer fluid life.Dexron VISpecification introduced in 2005 to replace Dexron IIIH. This specification requires better stay-in-grade properties, oxidative stability and anti-foam characteristics. Oils meeting this specification can be used with extended drain intervals and are energy conserving.
 

Corvetteran

Regular user
From the 1972 owners manual it says ATF suffix A. This was a high grade oil type supplied by GM back then. I just bought this..https://www.ebay.co.uk/itm/303822257094
 
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