<VV> 140 engine on a regular PG transmission

[Jim Davis]

The valve body, transfer plate as well as the governor are different on 
the PowerGlides used with the 140 hp engines.    The internal oil 
pressures are the same on all 1964-9 PowerGlides.  The PG 140s have 
higher shift points because the springs in the valve body are stronger 
and one valve body piston is slightly larger.  This along with the 
different governor allows for higher rpm part throttle shifts, higher 
rpm forced downshifts and full throttle shifts of 5,200 rpm.  The 
maximum torque is the is almost the same (within 4 ftlbs) for the 95, 
110, and 140 engines.  It is torque that makes the clutches slip; not HP.

The PG governors have four centrifugal weights.  Two primary and two 
secondary..  The primary weights are full out at 800 rpm (governor 
speed) and control the low rpm shift point.  The governor is driven by 
the rear wheels.  The secondary weights work against the internal 
pressure of the valve body (controlled by the TV lever and engine 
vacuum) to determine the up shift point. There are other springs and 
valves in play but these are the major players.    All the above 
information is found in Bob Ballew's booklet on PowerGlide transmissions.
Jim Davis


On 8/22/2012 9:20 AM, henry kaczmarek wrote:
> Jerry---The only difference between a 140 PG and Any other (I believe)  is
> the Governor is different.  The PG is (or should be) the same in all other
> respects.
>
> I've seen one taken apart.  I don't know for sure what the difference is,
> but from looking at them it could be the weights inside the governor.  The
> splines where the governor meshes with the transmission would have to be the
> same for all PG's.
>
> Hank