1959 PD4104 4spd. trans

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1959 PD4104 4spd. trans

Home > Discussion Forum > Mechanic's Corner - Transmissions

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All Messages in Thread	Author	Date
1959 PD4104 4spd. trans	Tyler	4-10-01
I have a 1959 GM PD 4104 with a 4spd. with overdrive,I'm seeking any info.on overdrive components,such as manuals,trouble shooting and pump pressures or repairs
Re: 1959 PD4104 4spd. trans	Doug	4-18-01
4 speed auto? A Allison VH or VS? have the manuals for those too. parts , maint and operation/maint
Over-drive	Wayne E	4-18-01
My 4104 is not blessed with the over-drive. I would also like to know about them. Also does anyone know of where I might look for one for my rig?
Re: over-drive	Doug	4-18-01
What model transmission is it, Is it a Hydrashift trans....I think I might have a manuals for it let me know what trans it actually is
Re: over-drive	Bill Morgan	7-15-04
Doug, I just ran across this thread. Is the Hydrashift you are referring to the planetary gearset that was fitted between the engine and bellhousing on some (rare) PD-4104's? I drove some belonging to Embree Buses in the seventies that I think came from Gray Line in San Francisco. They had eight forward speeds with an air-operated button on the shift lever for splitting hi-lo in each gear. The Hydrashift unit itself was about 3-4 inches wide and was often called a two-speed clutch.
Re: over-drive	Tyler	4-19-01
What model transmission is it, Is it a Hydrashift trans....I think I might have a manuals for it let me know what trans it actually is The make and model of my trans. is a Spicer model 7141A.Thanks for responding.

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