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| | | | Joined: Jun 2004 Posts: 100 Wrench Fetcher | | Wrench Fetcher Joined: Jun 2004 Posts: 100 | I had to replace the 3spd transmission in the 1940 Chevy Super Deluxe Conv... I always have a few used ones around(along with everything else...) and I installed a 3 spd with the words, "Rockford McGurk 009 Special" painted on the bottom. The result was unbelievable. 1st seemed higher, second pulled like a team of clydesdales and 3rd "feels" slightly overdrive...
What the hell is this? Possibly a Frank McGurk modified? Any one ever hear of this?
Scratchin' my head with a big grin,
Andy
A man is like an old truck... He will rust out before he wears out...
| | | | | Joined: Oct 2001 Posts: 3,458 Extreme Gabster | | Extreme Gabster Joined: Oct 2001 Posts: 3,458 | It's probably a tranny that some guy named McGurk pulled a "Rockford" with and broke reverse.  I have an old California Bill book that recommended using a Lincoln Zephyr transmission for the gear ratios, perhaps it is one of those? Does it have a standard GM bolt pattern?
Paint & Body Shop moderator
A lone amateur built the Ark. A large group of professionals built the Titanic. | | | | | Joined: Jan 2000 Posts: 1,586 Extreme Gabster | | Extreme Gabster Joined: Jan 2000 Posts: 1,586 | Regular Chevy 3 spd gear ratios were the same right up into the early 60's,2.94 first and a 1.68 second,third is always direct.Close ratio gearsets were offered for mid 50's Vettes,something around a 2.47 first gear and a 1.50 second gears and some say an even closer set with a 2.20 first gear.These gears can be fitted into the earlier 3 spds,perhaps that's what you got.It's possible McGurk had gears made,if so, your may have some valuable gears,lol. | | | | | Joined: Jun 2004 Posts: 100 Wrench Fetcher | | Wrench Fetcher Joined: Jun 2004 Posts: 100 | The tranny is sitting behind a stock 216... Thinkin' about how nice it would be behind the 261 :p
Andy
A man is like an old truck... He will rust out before he wears out...
| | | | | Joined: Jun 2004 Posts: 100 Wrench Fetcher | | Wrench Fetcher Joined: Jun 2004 Posts: 100 | Josiah, it is a GM trans... Next time I have it on the lift, I'll check the ratios.
A man is like an old truck... He will rust out before he wears out...
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#7582 01/15/2005 11:50 PM | Joined: Oct 2001 Posts: 3,458 Extreme Gabster | | Extreme Gabster Joined: Oct 2001 Posts: 3,458 | Is 1st gear synchronised?
Paint & Body Shop moderator
A lone amateur built the Ark. A large group of professionals built the Titanic. | | | | | Joined: Jun 2004 Posts: 100 Wrench Fetcher | | Wrench Fetcher Joined: Jun 2004 Posts: 100 | Yes, it is synchronised... Smooth as heck and it has a much shorter throw, so to speak... like it has a short shift kit. I really want to figure out exactly what it is...
Josiah, I'm just about ready to start restoration of the '53 3100 shop truck with a '61 261. What, if any, mods did you make on your motor?
Andy
A man is like an old truck... He will rust out before he wears out...
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#7584 01/17/2005 12:40 AM | Joined: Oct 2001 Posts: 3,458 Extreme Gabster | | Extreme Gabster Joined: Oct 2001 Posts: 3,458 | My motor is bone stock right now except for a dual point ignition and a 12 volt alternator and a shortened water pump. I need to rebuild it- it smokes a bit and has a lot of gasket leaks. It is still makes good power, though.
Paint & Body Shop moderator
A lone amateur built the Ark. A large group of professionals built the Titanic. | | | | | Joined: Jan 2000 Posts: 1,586 Extreme Gabster | | Extreme Gabster Joined: Jan 2000 Posts: 1,586 | FB,does your car still have the original torque tube or has the car been converted to open driveline?There are really only 2 all syncro 3 spd with a Chevy bolt pattern,Saginaw and the somewhat elusive Muncie. Both are designed for open drivelines. | | | | | Joined: Jun 2004 Posts: 100 Wrench Fetcher | | Wrench Fetcher Joined: Jun 2004 Posts: 100 | Still has the torque tube... I think it has been modified. I may just pull it out and disassemble to see what we have here. Thanks guys!
Andy
A man is like an old truck... He will rust out before he wears out...
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