1956 AMC Hudson Technical Service Manual Supplement

SECOND SPEED "L" RANGE
58
First gear "L" range is the same as first gear drive range except that the manual valve directs low
range oil through the 2-3 shift valve to the low band servo to apply the band for first and second
gear. The low band is necessary for engine braking since the rear sprag is not effective when
coasting. The D-3 passage is also open so the overrun clutch is applied for engine braking.
A 2-3 upshift will occur at approximately 45-50 M.P.H. When G-1 and G-2 pressures increase
enough to overcome pump pressure on the 2-3 shift valve from the low range passage and spring
force, the 2-3 shift valve will open.
Low range oil pressure remains on the 2-3 shift valve so that if the car speed decreases, the
transmission will downshift to second gear approximately the same speed as the upshift occurred.