55 Buick Dynaflow Low Band does not work

[M1842]

Not the usual question about low gear in Dynaflow, I know how drive works.  In this case. Shifting into low does nothing.  Reverse causes a little clunk as does drive.  Low has no clunk, and does not move the car regardless of RPM.  It might as well be another neutral.  Wondering if there might be an easy fix without dropping the transmission.   I have been living without low since I bought the car 4 years ago.

 

Mark

[SpecialEducation]

Most people can drive without low their entire lives… lol

 

Sometimes bad motor mounts shift the linkage out of whack. The detents are in the column, not in the transmission, so feeling it click into place means nothing. 

[M1842]

That was one of my thoughts, linkage that is.  I know at one point, Park didn't work and then it did.  I believe the transmission thrust mount is degraded.

 

Mark

[old-tank]

11 hours ago, SpecialEducation said:

Most people can drive without low their entire lives… lol

 

Sometimes bad motor mounts shift the linkage out of whack. The detents are in the column, not in the transmission, so feeling it click into place means nothing. 

For 1955 the detents are in the transmission.  With car on jack stands or lift move the lever through the detents with the engine running.  Apply the brakes before each move.

[M1842]

Thanks, Old Tank, I will give that a try.

 

Mark

[old-tank]

While it is up in the air, check the pressures as outlined in the service manual pg.166 and dynaflow troubleshooting pg.168