The 1982 Caprice is a body-on-frame RWD sedan built on GM's B-body platform with several engine choices. Most problems center around transmission durability, especially with the TH200-4R overdrive that debuted this year, plus carburetor complexity and diesel engine failures on the 350 diesel option.
TH200-4R Automatic Transmission Failure
Common · high severityTypical onset: 80,000-140,000 mi
Symptoms: Slipping between 3rd and 4th gear or won't go into overdrive, Harsh 1-2 shift or delayed engagement when cold, Red fluid leaking from bell housing or cooler lines, Whining noise in overdrive that goes away in 3rd
Fix: Full rebuild with updated clutch pack materials, torque converter inspection, governor replacement. 10-14 hours labor for R&R and rebuild. Many shops won't touch these—you're better off with a remanufactured unit swap.
Estimated cost: $1,800-3,200
Rochester Quadrajet Carburetor Issues (All Gas Engines)
Common · medium severitySymptoms: Rough idle or high idle that won't come down, Black smoke on acceleration, fuel smell from tailpipe, Hesitation or stumble when you step into the secondaries, Hard starting when hot, flooding, gas dripping from air cleaner
Fix: Usually needs full rebuild kit with replacement of float, accelerator pump, and power piston. Adjustments alone rarely solve it long-term. 3-5 hours if you know these carbs, 8+ if you're learning. Worn throttle shafts make rebuilding pointless—buy a remanufactured unit instead.
Estimated cost: $400-900
350 Diesel Engine Catastrophic Failure
Common · high severityTypical onset: 60,000-100,000 mi
Symptoms: White smoke on startup that doesn't clear, Coolant loss with no visible leaks, sweet smell from exhaust, Cracked or warped cylinder heads causing overheating, Sudden knocking followed by loss of power—rod through the block
Fix: The 5.7L diesel (LF9) shares a gas-engine block with inadequate head bolts and head gasket design. Head gasket failure is inevitable; once coolant mixes with oil, bearings fail quickly. A proper fix is a complete engine swap to a gas 305 or 350, not a rebuild. Engine swap labor: 16-24 hours.
Estimated cost: $3,500-6,500
Rear Main Seal and Oil Pan Gasket Leaks
Common · medium severityTypical onset: 100,000-150,000 mi
Symptoms: Oil spots on driveway centered under bellhousing area, Oil coating transmission bell housing and crossmember, Visible drip from rear of oil pan or oil pan rail seam, Low oil level despite no visible front-end leaks
Fix: Rear main seal requires transmission removal on all engines. Two-piece seal design common to small-block Chevys is prone to leaking once rope seal hardens. Oil pan gasket often leaks at rear corners. Rear main seal: 6-8 hours. Oil pan gasket alone: 3-4 hours if you can drop without pulling engine mounts.
Estimated cost: $600-1,400
Body and Frame Rust (Northern Climates)
Common · high severitySymptoms: Rust bubbling through rear quarter panels above wheel wells, Floors soft or rusted through under carpet, especially driver side, Frame rust at rear spring mounts and body mount points, Trunk floor rust around wheel wells and spare tire well
Fix: B-bodies rust badly in the rear subframe and body mounts. Surface rust becomes structural fast. Floor pan replacement requires cutting and welding, 12-20 hours. Frame section replacement at spring mounts: 8-14 hours plus alignment. If frame rails are compromised, vehicle may not be worth saving.
Estimated cost: $2,000-5,000
Intake Manifold Gasket Failure (305 and 350 V8s)
Occasional · medium severityTypical onset: 90,000-130,000 mi
Symptoms: Coolant smell from engine bay, no visible external leak, Slow coolant loss, reservoir needs topping off every few weeks, Rough idle or misfire when cold that improves when warm, Milky residue under oil cap but oil on dipstick looks normal
Fix: The small-block Chevy intake gasket fails where it seals coolant passages at the front and rear. Coolant seeps into the valley and either burns off or gets into oil. Requires intake removal, new gaskets, and valley pan check. 4-6 hours labor.
Estimated cost: $500-900
Transmission Mount and Crossmember Wear
Common · low severityTypical onset: 70,000-120,000 mi
Symptoms: Clunk when shifting from park to drive or reverse to drive, Vibration through floor at idle in gear that goes away in neutral, Visible sag in transmission tailshaft, driveshaft angle off, Driveline thump over bumps or on acceleration
Fix: Rubber transmission mount deteriorates and transmission drops, changing driveshaft angle and U-joint wear pattern. Easy fix: replace mount and inspect crossmember for cracks. 1-2 hours labor. Ignore it and you'll damage the driveshaft or rear U-joint.
Estimated cost: $150-300
Buy a gas V8 model with a documented maintenance history and solid frame—avoid the diesel and budget for a transmission rebuild within the first year of ownership.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.