I always coat both sides of the case so the gasket is between a skin coat of sealant. A good ring should not wobble on the gear cone. Certain case castings have bolt holes that break into the inside. I coat gasket surfaces with this sealant or use it in applications that do not require gaskets. The Muncie 4-speed transmission from General Motors is one of the most popular and widely used transmissions in the racing and rodding industry. This is something you must detect. A high-fitting ring can cause binding.
Step - 4: Inspect Syncro Ring Critical Inspection Synchro rings should be fitted and checked on each gear. Grease the internal lip of the seal and spring. Epoxies, such as J-B Weld, are great for fixing small cracks or porosity problems. Next, I then remove the shaft, which allows me to inspect the needles and check for complete rows, good alignment, and proper spacing. A vise holds some transmissions, but building a custom holding fixture is the way to go if you plan on doing volume work. Dirt is the main cause of bearing failure; seals keep the dirt out.
Copper scouring pads are abrasive enough to easily remove sealant. Insert the cutting edge of the chisel along the oil-feed passage and tap out the bushing. Often, people ask to purchase a new input shaft because the old one is missing three teeth. Once everything is in place, push the countershaft you are going to use through the gear, but hold a thrust washer in the front to prevent parts coming out of the opposite end. The threaded inserts form standard-size threads from nonstandard threads. Sometimes getting a bearing from a bearing supply house is not really a good idea because automotive- grade bearings require different fits and tapers. Step-2: Repair Damaged Threads Fastener threads strip out from time to time, but they are easy enough to repair.
If you look carefully you can see how one side of the bearing has more wear than the other due to the nature of thrust loads from the helical-cut gears. This is a 3-4 slider for a Muncie 4-speed. The majority of people cannot distinguish between bearing noise and gear noise. Any transmissions I build also have the gears completely deburred. This ruins the precision flat surface of the case and will lead to leaks.
The hole is tapped using a special tap that allows a threaded insert to be screwed into the bore. This bearing had more than 100,000 miles and when I pulled the seals the bearing still looked pretty good. This leads to cracks, holes, and stripped threads. Flip the synchro assembly over and install the second spring in a clockwise direction. It should fit firmly and lock to the gear while applying pressure to the ring as you rotate the gear. A few different-size bearing clamps, old transmission cases, piston wrist pins, aluminum round stock, and bearing races are great additions to your collection of press tools. This completed assembly shows solid-design strut keys.
These assembly gels break down faster for both gear lube and automatic transmission fluid applications. To remove really difficult bolts, heat and strike them, and then use a hammer to drive a Torx bit into the hex bore. Sometimes a ring may lock well on one gear but not another. Be aware that all kits are not alike, and kit parts have a great range of quality from very high to poor. Try to get a light into the bearing to inspect the raceways for pits or craters.
Aluminum and cast-iron cases can be heli-arc welded. Some gears are simply chipped by poor assembly or handling techniques. Tools that have a lifetime warranty form a basic foundation and are a wise investment. This is common damage on a Muncie reverse gear. Professional Mechanic Tip Dremel rotary tools have a reinforced cut-off wheel, which makes for very easy deburring.
Step-9: Verify Bearing Dimensions and Condition Precision Measurement Here is a typical sealed bearing. The insertion tool winds the drive tang into place. It should be used if the matching gears are in pristine condition. Step - 5: Inspect Spline Taper This taper is purposely machined into the spline. A shop press and three standard 8-mm bolts served the same function.