Valve Body Inspection
1. If a line-to-lube hole has been drilled in the PR valve circuit, it should be plugged to reduce converter drainback.
2. Inspect the line pressure plug and sleeve. Leakage here will result in poor line pressure control.
3. Inspect the TV checkball separator plate seat. Leakage here may produce stacked shifts and/or no kickdown.

Disassembly Instructions
1. Remove the detent assembly and spring retainer bracket (see Figure 1).
2. Remove the original pressure regulator spring and valve.
3. Remove the end plate on the opposite side of the bore and remove the line pressure plug and sleeve, throttle pressure plug and the spring (see Figure 3).
4. Keep all components removed in steps 2 and 3 except for the pressure regulator valve, spring and the throttle pressure plug for reassembly.
5. Clean the bore.

Reaming Instructions
Prep and Set-up:
1. Clean the bore thoroughly in a solvent tank.
2. Align valve body in fixture according to VB-FIX instructions with the appropriate guide pin provided in tool kit F-22771A-TL7. To align the pressure regulator valve use jig F-22771A-RJ and guide pin F-22771A-GP, then ream with reamer F-22771A-RM. To align the throttle pressure plug bore use jig F-22771A-RJ2 and guide pin F-22771A-GP2, then ream with reamer F-22771A-RM2.
3. Soak the bore and reamer with cutting fluid (Mobilmet S-122, Lubegard Bio-Tap, Tap Magic™, etc). For best results, provide a continuous flow of water-soluble cutting fluid (i.e. Mobilmet S-122) during the reaming process.
4. Gently insert the reamer through the jig and into the bore until the cutting tip contacts the first bore to be reamed.
5. Select the correct sized socket to fit the square shank of the reamer, and attach it to a wobble/swivel socket drive.

Reaming:
1. The reamer should be turned either by hand using a speed handle or by a low rpm, high torque air drill regulated to a maximum of 200 rpm.
2. The reaming action should be clockwise in a smooth and continuous motion, at 60-200 rpm. The reamer should actually pull itself through the bore, so little or no forward force should be applied.
3. Continue reaming until the reamer stop is reached. The approximate reaming time is 2-3 minutes.

source

Related Tags: , , , , , , , , , , , , , , , , , , ,