Gear selector shaft linkage conversion to aircraft certified universal joint...
11-10-2004, 10:49 AM
#1
AudiWorld Super User
Thread Starter
Gear selector shaft linkage conversion to aircraft certified universal joint...
<center><img src="http://pictureposter.audiworld.com/711/shifter1.jpg"></center><p>
I'm making a new one of these for my car and another one for someone else so I wanted to get an early pic up before the process starts.
U-joint is a "certified" AF&P (air frame & power plant)that conforms to or exceeds MIL-J-6193A, MS-10271 and supercedes AN271.
Designed for high axial, torsional loads. Sealed with lubrication inside and to prevent internal corrosion while dampening vibration. Built to exceed normal service life.
Applications:
ATC, Air Transport Cargo
ATP: Air Transport Passenger
SE: Single Engine
ME: Multi Engine
J: Jet
FWA: Fixed Wing Aircraft
RA: Rotor Aircraft
Above pic shows a new Audi 90 manual gear selector shaft which will be cut just behind the U-tang and the new bearing after machining a new Cro-moly tubular shaft will be pressed into the Audi part and retained by a collar with 3 retaining set-screws in a collar spaced 120 degrees apart threaded all the way into the internal cro-molly shaft and locked outside via a jam nut. Each screw/jam nut assembly will be "staked" once tightened so they become permanent. Same fastening method will be used on universal joint where it's sleeve will fit over the extending cro-moly rod.
At the transmission end a 7075 aluminum collar will be placed over the outside of the U-joint collar which will be drilled/tapped to accept stock Audi locating bolt that is found in all Audi manual transmissions.
Additionally the sleeve that slips over the transmission shaft will need to be internally sleeved back down to 14mm to fit the transmission shaft.
The reason behind all this is simple: its the best feeling, most bullet-poroof modification you can do to to a shifter either with or without a short-throw shift kit tho it's best-enjoyed with one. It simply KILLS the stock setup even when rebuilt using the archived modification. There is absolutely "zero" slop in this once done as no bushings are used whatsoever. Just a pure precision aircraft u-joint that uses aircraft grade ABEC 9 needle bearings. Its unGodly expensive and will outlive the car even if raced all day, every day for a thousand years. And it takes about 1/1,000 of a second to feel this modification in ANY car you ever sit in and shift from one gear to another. Most will never know how good it "can" be. Those that do will never be without one again. I became addicted in 1974 and I've never owned another manual transmission car that didnt get this modification sooner or later.
I'm making a new one of these for my car and another one for someone else so I wanted to get an early pic up before the process starts.
U-joint is a "certified" AF&P (air frame & power plant)that conforms to or exceeds MIL-J-6193A, MS-10271 and supercedes AN271.
Designed for high axial, torsional loads. Sealed with lubrication inside and to prevent internal corrosion while dampening vibration. Built to exceed normal service life.
Applications:
ATC, Air Transport Cargo
ATP: Air Transport Passenger
SE: Single Engine
ME: Multi Engine
J: Jet
FWA: Fixed Wing Aircraft
RA: Rotor Aircraft
Above pic shows a new Audi 90 manual gear selector shaft which will be cut just behind the U-tang and the new bearing after machining a new Cro-moly tubular shaft will be pressed into the Audi part and retained by a collar with 3 retaining set-screws in a collar spaced 120 degrees apart threaded all the way into the internal cro-molly shaft and locked outside via a jam nut. Each screw/jam nut assembly will be "staked" once tightened so they become permanent. Same fastening method will be used on universal joint where it's sleeve will fit over the extending cro-moly rod.
At the transmission end a 7075 aluminum collar will be placed over the outside of the U-joint collar which will be drilled/tapped to accept stock Audi locating bolt that is found in all Audi manual transmissions.
Additionally the sleeve that slips over the transmission shaft will need to be internally sleeved back down to 14mm to fit the transmission shaft.
The reason behind all this is simple: its the best feeling, most bullet-poroof modification you can do to to a shifter either with or without a short-throw shift kit tho it's best-enjoyed with one. It simply KILLS the stock setup even when rebuilt using the archived modification. There is absolutely "zero" slop in this once done as no bushings are used whatsoever. Just a pure precision aircraft u-joint that uses aircraft grade ABEC 9 needle bearings. Its unGodly expensive and will outlive the car even if raced all day, every day for a thousand years. And it takes about 1/1,000 of a second to feel this modification in ANY car you ever sit in and shift from one gear to another. Most will never know how good it "can" be. Those that do will never be without one again. I became addicted in 1974 and I've never owned another manual transmission car that didnt get this modification sooner or later.
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11-10-2004, 05:09 PM
#10
AudiWorld Super User
Thread Starter
those are just uncertified "MIL spec" joints. Might work fine for this or might come apart....
most non-cert MIL spec bearings are made in Indo-China to a spec. I suspect thats what these are. They're certainly not aircraft or AF&P certified nor does it appear they come with any certification. May/may not be a quality part. Any cetified aircraft bearing will run roughly 2.5-4 times a MIL spec bearing's price and come with documentation that goes in an aircrafts file.
Those may last 10 minutes or could conceivably be even better quality than the ones I have tho I think it a remote possibility. No way of knowing for sure. You pays your money and takes your chances.
Those may last 10 minutes or could conceivably be even better quality than the ones I have tho I think it a remote possibility. No way of knowing for sure. You pays your money and takes your chances.