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in 40-48 a mechanical replacement was produced for the vacuum assist unit,what are the pros and cons and is any one using the mechanical replacement on their car,thanks,chef
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Technical Advisor ChatMaster - 10,000
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Technical Advisor ChatMaster - 10,000
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A properly operating vacuum shift is hard to beat. You are correct in that new levers were available to convert it to manual shifting. Have not seen any in ages.  
RAY Chevradioman http://www.vccacolumbiariverregion.org/1925 Superior K Roadster 1928 Convertible, Sport, Cabriolet 1933 Eagle, Coupe 1941 Master Deluxe 5-Passenger Coupe 1950 Styleline Deluxe 4-Door Sedan 1950 Styleline Deluxe Convertible 2002 Pontiac, Montana, Passenger Van 2014 Impala, 4-Door Sedan, White Diamond, LTZ 2017 Silverado, Double Cab, Z71, 4X4, White, Standard Bed, LTZ If you need a shoulder to cry on, pull off to the side of the road. Death is the number 1 killer in the world.
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From what I recall the conversions were very difficult to adjust to work correctly, if they could be "adjusted" at all.
Gene Schneider
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Hey Bruce, How's it up there? Pretty nice down here last few days. I agree that a smooth vacuum shift is hard to beat. They're no good for "throwing a speed shift" but I doubt you're concerned about that.....   Bill.
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Backyard Mechanic
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Backyard Mechanic
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In the '50's I bought a 1940 Chevrolet. It had vacuum shift and it did not work very good. I converted it to mechanical with a kit and it worked very good without any further adjustments or trouble. The '41 I have now was converted when I bought the car. It works real well. Like someone above said I have not seen a kit in years. You could probably take one off a junker if you could find one. I would recommend changing over to mechanical.
Good luck JIM
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Shade Tree Mechanic
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Shade Tree Mechanic
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as a kid i remember my dad having shift problems w / the vacum type . i just saw a N.O.S. conversion kit listed on e-buy ( under vinetage car parts )
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Technical Advisor ChatMaster - 10,000
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We have shifted down this path before, and the concession is always, "works best with Vacuum Assist".
RAY Chevradioman http://www.vccacolumbiariverregion.org/1925 Superior K Roadster 1928 Convertible, Sport, Cabriolet 1933 Eagle, Coupe 1941 Master Deluxe 5-Passenger Coupe 1950 Styleline Deluxe 4-Door Sedan 1950 Styleline Deluxe Convertible 2002 Pontiac, Montana, Passenger Van 2014 Impala, 4-Door Sedan, White Diamond, LTZ 2017 Silverado, Double Cab, Z71, 4X4, White, Standard Bed, LTZ If you need a shoulder to cry on, pull off to the side of the road. Death is the number 1 killer in the world.
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Yes Bill it is also very nice up here,too bad I'm too busy to enjoy the great weather
My vac assist works well but shifting is quite sloppy and with my gas gauge not working at this time I run out too often and of course with no vac I can barely get off the road...I do presently have a n.o.s. mechanical shift lever,"just because"chef
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Oil Can Mechanic
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Oil Can Mechanic
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I would start by fixing the gas gauge... :whistle:
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Oil Can Mechanic
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Oil Can Mechanic
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I would stick with the vac. assist chef. If everything is adjusted correctly, even without vac. it should still shift without too much trouble.
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Tech Advisor ChatMaster - 25,000
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Tech Advisor ChatMaster - 25,000
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Absolutely.......I would definitely start by fixing the gas gauge first.  :) :grin:
The Mangy Old Mutt
"If It's Not Junk.....It's Not Treasure!"
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yah.I thought I'd through all my issues out to get several opinions.Changing the Vacuum assist would be my last resort and having the lever I thought I'd ask. The gas gauge is most definitely the sending unit which I also have a replacement,but of course the gas tank being one of the last parts I have not restored,it should also go.Of course the new one will need sealing and paint,I've been slow to getting to this problem...In time I'm sure I will get to it....I will though,try to eliminate the play in the shift rods.I have been very careful not to fool with it too much,quite a sensitive adjustment,at least with my 48
Last edited by chef-chevy; 05/18/07 09:03 AM.
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I would top=off the tank every 100 miles and join AAA... :/
Gene Schneider
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Yeah,I know and a full gas can always in the truck,chef
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