1962-74 Tach Drive Distributor Restoration

**Detailed Bushing Installation**
Distributor Rebuild Guide

  1. Remove distributor assembly from engine and place lower part of housing in vise, clamping securely.
  2. Remove cap and rotor from cam assembly.
  3. Lift off springs and weights from cam.
  4. With a drift punch drive out lower distributor gear split pin.
  5. Next, remove lower gear and shim.
  6. Remove the brass coupling which houses the tach driven gear and shim.
  7. The main distributor shaft can now be removed.
  8. Next remove the small spring clip at the top of the point plate from the groove in the upper distributor bushing & the lead wire from the point assembly.
  9. The point plate can now be removed. Remove the 2 screws retaining the vacuum control unit & remove unit. The distributor housing should now be stripped bare, with the exception of the lead wire, which should be inspected for brittleness and/or bare areas. Replace this if necessary.
  10. Now remove the felt washer and the plastic seal from the distributor housing.
  11. The next step entails removal of the upper and lower bushings by either using a small slide hammer, or sawing them in half lengthwise with a hacksaw blade.
  12. After removing old, worn bushings, install Paragon’s lower (short) bushing in base of housing with the chamfered end first. Use our installer tool for this process. Insert shafted end of tool in bushing I.D. and drive in by tapping end of tool with hammer until flush with housing bottom. See below for detailed bushing installation guide.
  13. Next, insert tool in upper bushing (long), making sure that the notched end is down, and drive the upper bushing into position, getting notch lined up with I.D. bore for tach driven shaft inside housing. Drive upper bushing down until it is 1/2″ from the top of the distributor housing ring in which the plastic seal is pressed. (Shown in diagram)
  14. Now you are ready to insert the drill guide tool into the coupling threaded hole. Do so and tighten down snuggly with 7/8” wrench.
  15. Insert 13/64 drill into guide until it bottoms out against the housing. Apply oil to bit and drill hole in the housing.
  16. Remove drill guide and insert tap guide, using the same procedure. Insert 1/4-28 N.F. tap, and tap out hole in housing. These guide tools are hardened steel and can be used over and over again. They also provide an excellent way to center the hole in the housing for a setscrew, which eliminates endplay, and hence gear failure.
  17. Clean out all cavities of housing with solvent, and dry.
  18. Pack liberal amount of silicone grease, or high quality grease, into cavity around the upper bushing and then install felt seal and plastic seal.
  19. Lightly oil bushing I.D. and reassemble distributor in reverse order. At this time you will install Paragon Reproductions new and improved tach drive gear with the brass thrust button.
  20. After assembly is almost complete, inspect brass coupling I.D. carefully for wear. Now apply a liberal amount of high temperature grease in the grease grooves of our tach drive gear shaft, then insert shaft in I.D. of coupling.
  21. Now screw coupling in distributor housing (use a little Loc-Tite on coupling), after placing liberal amount of lightweight grease into cavity. This grease aids in lubricating gears until engine oil can reach gears and protect them.
  22. Now take the enclosed set screw, and screw it into the newly tapped hole until all end-play is removed from gear shaft, then back-off approximately ¼-1 turn. Check to make sure the distributor shaft turns freely, if not adjust the set screws & coupling until the shaft will move freely in both directions. Putting on a small amount of Loc-Tite will prevent screw from backing off.
  23. Paint if desired and reinstall for many trouble-free miles of operation.

NOTE: Delco started using a nylon thrust button in 1968 on some 427 equipped and other special high performance cars. In 1969 and 1970 350 engines and all 1971-74 cars had this nylon button inserted in the hole in the opposite end of the tach driven gear in the housing to limit it’s end play. This button was very ineffective in preventing end play as the centering hole in the end of the gear would drill right into the nylon and then start wearing on the cast distributor housing.

Bushing Installation Guide

  1. After, installing upper bushing, in the housing, use an inside micrometer to check entire length of Inside Diameter (I.D.). This is critical because in some cases the distributor housing I.D. bore varies in size and therefore can have a “crushing” effect on the bushing causing it to close up on the shaft Outer Diameter (O.D.). Another aspect that must not be ignored is that after engine-operating temperature is reached, the shaft expands and can cause the shaft to seize up on the bushing. Adequate clearance therefore is essential. The proper installed I.D. of the bushing should be .493 to .4945. Include the lower bushing in the procedure.
  2. To enlarge I.D. of bushing to this size will require use of an adjustable reamer which most automotive machine shops use. There is no way to avoid this procedure, as the distributors were line reamed after the bushings were installed at Delco, and there are variations in all distributors. In the event that your O.D. exceeds the maximum size and the bushing is loose, a small amount of Loc-Tite or a similar epoxy liquid applied to the bushing O.D., before installation will harden and keep the bushing firmly in its proper location. After installing bushings, upper and lower, install the long distributor shaft as an alignment tool, to hold upper bushing in straight line with lower bushing until the epoxy cures.
  3. Failure to follow these above procedures will void any warranties!
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1962-64 Powerglide Shifter Linkage Installation

  1. Set control rod bell crank (A) in Park position.
  2. Set control shaft lever (B) in Park position.
  3. With both the bell crank and lever held in Park position, assemble control rod (C) to lever (B), then adjust clevis on rod (C) for easy entry into lever (A).

**Please note that parts numbered in the schematic are included in our 271K linkage kit**

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1957-62 Muncie 4-Speed Linkage Installation

The 4-Speed transmission gearshift linkage utilizes three shift rods and levers. A simple gauge block will aid in making the proper adjustments. The adjustments can be made without the gauge block by having an assistant hold the manual shift lever in the neutral positions. Remove transmission gearshift lever seal from the floor pan.

  1. Place transmission in neutral and install gauge block in position as shown in illustration.
  2. Remove the cotter pin, anti-rattle washer and clevis pin at each shift lever.
  3. On each shift rod, adjust the threaded clevis to permit free entry on the clevis pin into the hole in the transmission shift lever.
  4. Reconnect the clevises to the shift levers.
  5. Remove the gauge block and check the shifts. If any roughness still exists, one of the clevises may require adjustment of approximately one-half turn. Determine the rod and clevis requiring adjustment by sighting along the slot where the gauge block was used in step 2.

Purchase 270K 1957-62 Muncie 4-Speed Linkage Kit by clicking here.

1957-62 Borg Warner 4-Speed Linkage Installation

The 4-Speed transmission gearshift linkage utilizes three shift rods and levers. A simple gauge block will aid in making the proper adjustments. The adjustments can be made without the gauge block by having an assistant hold the manual shift lever in the neutral positions.

  1. Remove transmission gearshift lever seal from the floor pan.
  2. Place transmission in neutral and install gauge block in position as shown in illustration.
  3. Remove the cotter pin, anti-rattle washer and clevis pin at each shift lever.
  4. On each shift rod, adjust the threaded clevis to permit free entry on the clevis pin into the hole in the transmission shift lever.
  5. Reconnect the clevises to the shift levers.

Remove the gauge block and check the shifts. If any roughness still exists, one of the clevises may require adjustment of approximately one-half turn. Determine the rod and clevis requiring adjustment by sighting along the slot where the gauge block was used in step 2.

Purchase 269K 1957-62 Borg Warner 4-Speed Linkage Kit by clicking here.

1956-62 Windshield Wiper Transmission Installation

Note the wiper transmission in Figure 1. Two people will be required for the first step and for the final step. One person should stand outside the car to push down on the left windshield wiper transmission drive shaft, which separates the upper and lower clutches.

From under the dash, pull on the cables; this permits the clutches to rotate, extending the length of both cables. Once the cables are fully extended, have the second person release the transmission shaft. The clutches will lock back together and the cables will be held in their extended positions. Repeat this procedure with the right transmission.

Now that both transmission assemblies have their cables extended and in the locked position, you’re ready to connect the cables to the wiper drum assembly. Refer to Figure 2 and hook the cable ends on the drum as indicated.

Once the cables are attached to the drum, have the other person press down on the left wiper transmission shaft again. The clutches will be released, and snap back to spring load the cables. Now repeat on the right transmission, check the cables on the drum one last time.

Note that the upper cable is 24” long and the lower cable is 24 5/8” long, both dimensions include the ends.

Purchase 10-Wiper Trans 1958-62 Windshield Wiper Transmission Reconditioning Service by clicking here.