1982 PONTIAC 6000

Typical onset: 60,000-90,000 mi

Symptoms: slipping between gears especially 2nd-3rd, delayed engagement when shifting to Drive, whining noise from bellhousing area, burnt transmission fluid smell

Fix: The THM125C (transverse 3-speed auto) was notoriously weak in early A-bodies, especially behind the V6. Internal clutch packs fail, governor seals leak, and valve body bores wear. Rebuild requires 12-16 hours with complete teardown. Often need new torque converter, all clutches, and bands. Transmission mounts also fail frequently (add 1.5 hours), causing excessive movement and accelerating internal wear.

Estimated cost: $1,800-2,800

Typical onset: 80,000-120,000 mi

Symptoms: blue smoke on startup and acceleration, oil level drops 1 quart per 500-800 miles, rod knock or deep engine knock, loss of compression on one or more cylinders

Fix: The Tech IV 2.5L has weak piston rings and inadequate oil control from the factory. Rings collapse, leading to oil burning, then eventually rod bearing failure. Once knocking starts, you're looking at minimum short-block replacement (14-18 hours) or full rebuild with pistons, rings, bearings, and typically a crank polish. Many opt for junkyard long-block swap instead due to labor cost.

Estimated cost: $2,200-3,800

Symptoms: rough idle and stalling when warm, hesitation on acceleration, black smoke from exhaust, hard starting after sitting, poor fuel economy under 15 mpg

Fix: The E2SE (Electronic 2-barrel) carb is vacuum-nightmare technology. Mixture control solenoid fails, feedback system goes haywire, and internal passages clog. Rebuilding takes 4-6 hours if you know what you're doing, but most techs just replace with remanufactured unit (3 hours swap). Also check vacuum lines — they rot and cause false lean conditions.

Estimated cost: $450-900

Typical onset: 90,000-140,000 mi

Symptoms: clutch pedal feels different or hard to engage (manual), grinding noise when releasing clutch, excessive crankshaft endplay measurable at harmonic balancer, metallic scraping on startup

Fix: GM transverse engines of this era had marginal thrust bearing design. Clutch riding or aggressive driving wears the center main thrust surface. Requires full engine teardown, crank removal, and machining or replacement (18-24 hours). Often discovered during other internal work. If caught early, sometimes oversized thrust washers work, but most need crank replacement or welding/machining.

Estimated cost: $2,800-4,200

Typical onset: 70,000-110,000 mi

Symptoms: transmission fluid puddles under front of car, pink fluid visible along cooler lines, transmission overheating and slipping, low fluid level despite no visible pan leaks

Fix: Steel cooler lines rust through where they run along subframe, especially in salt states. Lines are cheap but replacement requires removing front fascia support and working around tight engine bay (3-4 hours). Leaking cooler lines starve the already-weak THM125C and cause catastrophic failure if ignored. Always replace both lines together and flush cooler.

Estimated cost: $350-600

Symptoms: engine dies in hot weather after highway driving, stumbling and surging at steady cruise, won't restart until engine cools 20-30 minutes, intermittent fuel starvation feeling

Fix: Fuel lines routed too close to exhaust manifold cause vapor lock in warm climates. In-tank pump (if electric-equipped) also fails. Inline fuel filters clog from tank rust — replace every 15k miles (1 hour job). Vapor lock requires rerouting fuel lines away from heat or adding heat shield (2-3 hours custom work). Some guys add electric pusher pump as band-aid.

Estimated cost: $180-500