Quote:
Originally Posted by Stuart
I remember having a conversation with SteveP some years ago about this; the Slim Jim Roto-Hydramatic is described in my 1961 shop manual as a three speed, but by 1964 there some internal changes made and the manual that year did describe it as having four speeds.
In any case, calling it a three speed or four speed is not really the issue here, it's the fact that it's skipping gears in the middle. SteveP is the resident expert on them, he should see this discussion sooner or later and be able to respond with some advice. One thing I do know is they're very sensitive to the adjustment of the TV rod that goes from the carburetor linkage to the transmission; it's possible that needs to be checked and readjusted.
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My 62 and 63 H/M manual call it a three speed/ four range HydraMatic. But you are right this is not the issue and as said before the H/M manual says look here first;
So what it says in diagnostic's for Roto is: Drive in First, Second, and Fourth ( skips drive RT or S ) 1. Control valve assy. 2. Coupling