Component Disassembly & Reassembly: MAINSHAFT: Reassembly

1992 GMC Jimmy Base, 2D Utility, 4.3 Z, 4WD, StandardSECTION Reassembly
  1. Assemble 1st-2nd, 3rd-4th and 5th-reverse gear synchronizer assemblies. Install bearing assembly and reverse gear on output shaft. Check hub and sleeve scribe marks for correct position. Align and engage splines of 5th-reverse synchronizer assembly and output shaft with spiral lock ring toward reverse gear. See Fig 1 .
  2. Using Tool (J-36183, J-36184 & J-22912-01) and hydraulic press, press 5th-reverse synchronizer assembly with synchronizer ring onto output shaft until seated. Install NEW snap ring. Install bearing assembly and 5th gear on output shaft.
  3. Install bearing assembly and 1st gear on output shaft. See Fig 1 . Align and engage splines of 1st-2nd synchronizer assembly and output shaft. Using Tool (J-36183, J-36184 and J-22912-01) and hydraulic press, press 1st-2nd synchronizer assembly with both synchronizer rings onto output shaft. Check hub and sleeve scribe marks for correct position.
    CAUTION: Groove on outside of sleeve must face toward 2nd gear to prevent gear clash during 1st-2nd gear shifts.
  4. Stop press before tangs engage. Lift and rotate 1st gear to engage synchronizer ring. Continue to press until synchronizer assembly is seated. Install bearing assembly and 2nd gear. Ensure bearing cage is together. Install 2-piece thrust washer and NEW retainer ring. Install bearing assembly and 3rd gear. Align and engage splines of 3rd-4th synchronizer assembly and output shaft.
  5. Using Tool (J-36183, J-36184 and J-22912-01) and hydraulic press, press 3rd-4th synchronizer assembly with both synchronizer rings onto output shaft. STOP press before tangs engage. Lift and rotate 3rd gear to engage synchronizer ring. Continue to press until synchronizer assembly is seated. Install NEW snap ring.
Fig 1: Exploded View of Transmission Components (2WD & 4WD)
G92J12525Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
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  • β€’ You are not confident in the next step or safety outcome.