Quote:
Originally Posted by Swed Olds
........ some guy told me that these trannys had both ........
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OK. First up, normally I don't do
trannys. But, in this case, I'll make an exception.
From the beginning in 1939, Hydramatic, Dual range Hydramatic, Jetaway Hydramatic, and Roto Hydramatic were 4 speeds.
The confusion comes from the number of positions, shown on the quadrant/dash.
'39-'51 Hydramatic was N D Lo R (Lo = 1-2 and D = 1-4) = 4 speeds.
'52-'56 Dual Range Hydramatic was N D S L R (L = 1-2, S for Super performance =1-3, and D =1-4) = 4 speeds.
'56-'64 Jetaway and Roto Hydramatics, were P N D S L R (same as the Dual Range, except park was moved from R to P)
Bottom line? 4 speeds and 3 positions = confusion.
Norm