Step 10: Install Retainer Gaskets Because several different replacement front bearing retainers are available, different-thickness gaskets are necessary. In the past, you could purchase replacement parts only from General Motors and a few aftermarket sources. It takes a wider front-sealed bearing and has a sealing plug for the countershaft. If you have to press it on, support the bearing by the inner race and press the input shaft into it. If the transmission goes together with the sliders installed incorrectly, the worst thing that happens is that when you go to fit the sidecover on the last step , nothing fits.
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. By 1981 I had developed the first retail rebuild kit for the Muncie. From 1967 to1968, the serial number began with a number designator for the year, and then a letter designator for the month. Older fittings had no seals. Step 15: Remove Reverse Idler and Thrust Washer Important! An example would be P4D23B. The side cover has seven bolts and two shift cams.
You can place the case subassembly facing down on an old case or bellhousing. Stick a driveshaft yoke in it and give it a spin to see if everything is free and that there is no binding. Remove the six tailhousing bolts and pry off the tailhousing. Elongated bores cause leaks and geometry problems, which lead to poor shift feel and quality. Step 8: Tighten Mainshaft Nut Position the nut with the tapered side facing forward.
Now is a good time to stick in an old driveshaft yoke and rotate the transmission to see that everything is working smooth, not binding, and shifting. Step 22: Install Rear Reverse Idler and Parts Install the rear-reverse idler, thrust washer, and idler shaft in the main case. Make sure that they all locate correctly on the spline, and that the strut keys are indexed correctly in the synchro ring. I use a skin coat of 51813 Permatex sealant on the case. A new side cover followed and then new tailhousings. B First-Gear Sleeves All these gear sleeves have the center tapered in for oil collection.
Step 6: Remove Rear Bearing Use snap-ring pliers to spread the rear bearing retaining ring open and then tap the bearing with a hammer to dislodge it from the ring. Use pliers or a spring hook to install the spring. This needs to be done in a machine shop on a vertical mill. Different kits come with different ring sizes varying from. 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.
Step 10: Install Reverse Idler and Thrust Washer Once I fully chamfer and deburr the gear, I install the forward reverse-idler thrust washer and hold it in place with grease. If so, remove it from the extension. Select the parts you require from the following list and give us a call. The groove cut into the forward edge is due to the 1-2 slider hitting it. Hold the 3-4 slider in place and guide the mainshaft over the countergear.
Step 4: Load Countergear Needles With the spacer tube in place, load the split-seam tube. Step 15: Remove Countershaft from Case Use a ball-peen hammer and a punch to drive the countershaft from the front side of the case toward the back. Think of the M22 gears as semi-helical. Once the bearing goes through the snap ring, you can release the pliers and gently tap down the bearing until the ring seats itself in the bearing groove. The later style left has thicker rings, but a thinner hub, as compared to the early set right. It helps make your rebuild look more professional. To position them correctly, both hubs must have their extended bosses facing toward the front.
It acts as a thread locker as well. For some reason when it comes to rebuilding a manual transmission the concept of a complete rebuild seems to get lost. I spend most of my time building new transmissions with all-new parts. Step 11: Install 1-2 Slider The sliders, however, face in opposite directions. To speak to a Drive Train Expert or to place an order call toll free! Step 7: Pry Off Retainer Remove the four bearing retainer bolts and pry off the retainer. Sidecover Disassembly Step 1: Remove Spring Notice the positions of the cams and the spring.