This allows the 1-2 fork to clear the reverse idler boss in the main case. An M22 gearbox has about a 20-degree helix angle on the gearset, rather than a 37-degree angle. Step 5: Test Countershaft Fit with Needles Flip the gear over and repeat the process in step 4. This first-gear comparison shows that the surface enhancement extends into the valley between the teeth. Either way, got all the bits and pieces from the chevelle pulled together, the big monster cast iron bell housing I used. You can now get an M22 with a 2.
Here is a quick spline-groove identification chart: 1963-'65 M20 2. Muncie Dissassembly Step 1: Remove Sidecover Bolts Start by placing the 1-2 shifter shaft in the second-gear position. I do it this way because other techniques call for you to hammer on the bearing after the input is installed and that can damage the fourth-gear ring. The Auto Gear production floor is filled with new Muncie main case and extension housing castings. I was searching around for a kit, and the one place I found I gave the tag number, and they said they have no records of this number tag.
Most are also seized, and you may need to apply heat with a propane torch in this area to knock it out. When Auto Gear or a reputable shop assembles a new Muncie with new parts, you get experienced builders assembling new gearboxes, you get realistic feedback, and more transmissions are brought into the marketplace. I guess the money was worth the bell housing and the case is clean, oil is clear, rotates real nice for first and second, just hoping to get an answer on why this would be done. In fifth gear, a 3. Some sliders are very loose and can drop off the hub. In the old days, it was standard practice to take it apart and see what it needs, then buy the parts. Some applications, such as Pro Shifting, remove the rings completely.
Always reinstall the spring facing in this direction. Newer styles have an outside support flange. And at that time I make sure which exact parts I need, so I order the right ones. The low helix angle of M22 gears produces less heat, less side loading, and stronger load distribution across the gear tooth. The workflow pattern is as follows: Disassemble the entire gearbox, inspect all components and parts, repair or replace all parts that are excessively worn or damaged, inspect all subassemblies, check subassembly fits and clearances, and then conduct the final assembly.
It helps make your rebuild look more professional. Align the shaft so that the roll pin faces in this position. To speak to a Drive Train Expert or to place an order call toll free Need Stronger Parts? More than 1 pound of material is removed in this process. This is a hard part, and you have to also make sure the fourth-gear ring indexes correctly with the 3-4 synchro assembly. An adapter clip is supplied when replacing later bolt on—style shafts. That is not the correct way to repair this problem.
Step 12: Remove Gears from Case From the left, the subassemblies are the tail section, main case, sidecover, and mainshaft with midplate. Place the fitting hold into the groove of the fitting. I know this from first-hand experience; and, more important, this is a problem with the automotive aftermarket in general. The countergear is still dropped to allow it to be placed in this position. Will fit either the 27 spline or 32 spline output shaft.
We need to pull the motor in the Camaro to change the oil pan that never stopped leaking from day 1. Step 9: Remove Anti-Rattle Springs Some mainshafts have circular grooves cut into the reverse gear spline for these tiny anti-rattle springs. George could see the demand for Muncie parts was growing. Remove these plates on every M20 countergear because they have a tendency to break or loosen. Step 4: Install Rear Thrust Washer Install the rear washer and push the whole countergear to the bottom of the case. The M20 and M21 have the same cut to the gears, the M22 is a straighter cut resulting in a greater strength. Instead, I suggest you leave the countergear dropped down and install the input shaft with the bearing.
Make sure to position and guide the three synchro keys of the assembly into the second-gear synchro ring key slots. Another great advantage is shaft cooling. Order extension housing bushing separately. The new countergear components and stub shaft teeth are no longer hobbed; they are ground for better finish after heat-treating to improve profile accuracy. Step 27: Install Front Retainer The front retainer is installed with the lock plate tangs bent. Torque tension onto the transmission case fig. If new idler shaft is being used.