tiparosa

1962 Dynamic shifts from 1st to 2nd and the engine seems to be "lugging" when she shifts to the point it does not appear to be the correct shift time. Is there a way to adjust when the hydro shifts gears? the car is all stock.

thanks,
T

American Lead

I do not know about the trans, but in my 55 manual it says a sluggish engine can be easily mistaken for trans, hope you find your problem.

tiparosa

The more I drive the car the more I agree with you Paul. My 62 has a rebuilt 394 and rebuilt tranny within the last 2 years and it is an outstanding driver besides the early shifting. The more I drive it the more I can manage the shifting with the gas and brakes which makes it more tolorable.

Kahuna

When I first got my '62 Dynamic 88 a couple of years ago, I experienced the same phenomenon and thought something was wrong with my transmission, so I did some research. The “Slim Jim” Roto-Hydramatic Model 10 4-S (four stage) transmission is essentially a three forward gear, one reverse gear design with a small torque converter. The torque converter's stator, the "Accel-A-Rotor", creates a two-stage shift effect in first gear. The shift from first to second speed (or stage) happens early by design, within a few feet of travel to get the heavy car launched. The "Accel-A-Rotor" actually converts the first gear ratio from 3.56:1 to 2.97:1. When the car shifts to second gear, it’s actually in the third stage speed at 1.56:1. Third gear is fourth stage speed at 1:00:1, and reverse is 3.53:1.

Kahuna

Thanks Paul. Love your Starfire.

aristellier

Hi guys, I seem to have the opposite, on my '63 88 the first stage seems to hang on forever and then shifts almost immediately to 2nd, any ideas on how to make the 1st stage change earlier?

Olds64

That is probably normal for your transmission. My 64 98 also shifts that way. The best thing for you to do is adjust the throttle valve linkage that goes from the carburetor to the transmission. Definitely purchase a factory service manual as well.

rocketraider

Doesn't hurt to have the factory service tools either. TV rod adjustment is critical on a Slim Jim.

I can think of one SJ in my experience that felt like it shifted right. It was in a 63 D88 Holiday sedan that I really should have bought from the old couple who owned it.