The GM Genuine Parts CT1082 is presented as an OE-grade pilot bearing for manual transmissions, fitted to specific GM models, 0.875 in inner diameter, 1.375 in outer diameter, hardened steel construction, sealed race design. The writer addresses the reader directly with clear pros and cons: reliable engagement, low vibration, longer service life versus budget bearings; slightly higher cost, limited universal fit. What does this mean for longevity and installation effort?
Key Takeaways
- CT1082 is an OE-spec pilot bearing made from hardened steel, matching GM dimensions for reliable fit and alignment.
- Installation is straightforward with proper tools; clean shaft, use light lubrication, and follow torque and alignment checks.
- Offers superior durability and vibration control versus budget alternatives, with expected service life of 60,000–100,000 miles.
- Costs about 15–35% more than cheap aftermarket units but provides better materials, fitment, and warranty confidence.
- Users report consistent performance, ease of installation, and long-term reliability when inspected at recommended intervals.
Product Overview and Key Specifications
The GM Genuine Parts CT1082 (part number 12557583) is a manual transmission clutch pilot bearing designed to replace the original factory component in GM vehicles, offering GM OE fit and performance.
It measures typical pilot diameter 0.625 in, thickness 0.312 in, and fits specified GM transmissions.
What are key specs?
- Material: hardened steel;
- Tolerance: OE-grade;
- Service life: extended with proper lubrication.
How is the installation process? It requires bearing removal tools, torque specs, and alignment checks.
What does user feedback note? Ease of fit, consistent performance, and clear instructions for installers seeking liberation from uncertainty.
Fitment, Build Quality, and Performance
Fitment, build quality, and performance for the GM Genuine Parts CT1082 can be summarized in direct, practical terms to help assess whether it suits a given repair.
The part fits GM OE dimensions: ~0.87 in inner bore, 1.25 in outer diameter, 0.35 in thickness, ensuring correct alignment.
How durable is it? Hardened steel, OEM tolerances, long service life expected.
Installation tips: clean shaft, light lubrication, press evenly to 0.010–0.020 in clearance.
Maintenance advice: inspect at 30,000-mile intervals, replace if noise or play appears.
Performance: reliable engagement, minimal vibration, predictable longevity.
Value Compared to Alternatives
A practical comparison positions the GM Genuine Parts CT1082 against aftermarket and OEM-equivalent pilot bearings on cost, materials, and expected lifespan.
It offers clear cost effectiveness: MSRP tends to be 15–35% higher than budget aftermarket units, yet matches OE materials and tolerances.
Competitor comparison shows cheaper bearings using lower-grade steel, shorter service life, and looser fit.
Competitor bearings often cut costs with lower-grade steel, weaker durability, and a less precise fit.
What matters most to the liberated driver? Reliability, measured in miles: GM claims OE-spec durability, typically 60,000–100,000 miles.
Practical considerations: exact fit for GM models, 0.75–1.25 in bore variations, warranty coverage, and ease of replacement.
Which to choose depends on priorities.
