Au7o mascotAu7o
Known IssuesTest Hub demo
  1. Au7o
  2. /
  3. Known Issues
  4. /
  5. Pontiac
  6. /
  7. Trans Am
Pontiac · Known Issues

1998 Pontiac Trans Am Problems: 4 Known Issues

1998 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated August 2026

Share:@au7o.io

1998 · All trims · All engines

Choose the year and equipment for your written issues and visual request.

No email neededHow interest is saved

Interest applies to the selected vehicle and configuration; it is not a reservation. Voting stores a first-party identifier for up to 180 days to prevent repeat votes. No account or email is needed. Clearing cookies or using another device may count separately. Privacy

Visual coming soon

Your interest helps us choose what to build next.

Visual Known Issues · Coming soon

$4.99/month plus taxes at launch · No payment today

Preview the XT6 example
Known IssuesMotorcycle IssuesDTC LookupDrivePricingAboutTermsPrivacyCookiesConsentData rightsCopyrightFeedback
Share:@au7o.io

Vehicle data and repair guidance on this site are compiled with AI assistance and may contain errors. Always verify with your service manual or a qualified mechanic.

Data protection representation

DataRep representative in the United KingdomDataRep representative in the European Union
Au7o · 2026
Built for DIY mechanics. Privacy-first.
Explore free Hub demo
Issue summary

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 1998 Pontiac Trans Am has 4 documented known issues, with 1 rated critical. The most serious is 4L60E automatic transmission 3-4 clutch pack failure ($1,500-$2,800 repair). Across all issues with published estimates, repair costs range from $30 to $5,000. DIY maintenance guides at au7o.io.

In This Article

  • Trans Am Transmission1
  • Trans Am Engine1
  • Trans Am Electrical1
  • Trans Am Body/Panels1
  • FAQ
Get Started
Back to top

In This Article

  • Transmission1
  • Engine1
  • Electrical1
  • Body/Panels1
  • FAQ

All 4 Known Issues

Filter:
ALL YEARS1999199819971996199519941993199219911990

On the 1994-1999 Pontiac Trans Am, the 4L60E automatic (and its 700R4 predecessor) used across the 1990s Trans Am/Firebird is well known for burning up the 3-4 clutch pack. The 3-4 clutches see the highest load and heat, and failure is described by the F-body community and transmission specialists (Sonnax) as the number-one cause of a 4L60E dying. Contributing factors include GM's load-release springs in the clutch pack, a checkball/exhaust issue, a flex-prone OE backing plate, and line-pressure control affected by sensor faults. Once the 3-4 clutches burn, the transmission slips or loses 3rd and 4th gear entirely. High-mileage and hard-driven/modified cars are most affected.

This issue also affects: Chevrolet Camaro, Chevrolet Corvette, Pontiac Firebird

Common Symptoms

  • Slipping in 3rd and 4th gear
  • No shift to 3rd/4th
  • Flare or delayed engagement on 3-4 shift
  • Burnt-fluid smell
  • Rising RPM without acceleration at highway speed

How to Fix

Rebuild the transmission with an upgraded 3-4 clutch pack (Raybestos GPZ or Borg-Warner Hi-Energy frictions are the community favorites), remove the problematic load-release springs, add a shift/valve-body correction kit and a stronger backing plate, and use fresh fluid and filter. Keeping the trans cool with an auxiliary cooler and servicing fluid on schedule extends life.

Typical repair cost:$1,500 - $2,800

Research This Issue

GoogleRedditYouTubeNHTSA
Community Reported
High ConfidenceVerifiedReviewed Jul 2026

On the 1998-1999 Pontiac Trans Am 5.7L LS1 V8, the 1998-1999 Trans Am/Firebird WS6 introduced the aluminum-block LS1 5.7L V8. Early LS1 engines are known for cold-start piston slap, a metallic knock or rattle at startup that quiets once the engine warms up. The root cause is the cast-iron cylinder sleeves not expanding as much as the surrounding aluminum, so cold pistons fit loosely in the bore. A related GM TSB (#01-06-01-023, covering 1999-2001 5.7L LS1 Camaro/Firebird/Corvette) documents higher-than-expected oil consumption (roughly 400-600 miles per quart) caused by a piston-ring-to-cylinder-bore interaction, especially in cars driven hard at high RPM. Not every engine is affected, and piston slap alone is generally not harmful, but the combination worried many owners.

This issue also affects: Chevrolet Camaro, Chevrolet Corvette

Common Symptoms

  • Metallic knock/rattle at cold startup that quiets when warm
  • High oil consumption (approx 400-600 miles per quart)
  • Low oil level between changes
  • Light exhaust smoke under hard use

How to Fix

Cold-start piston slap that quiets when warm is generally considered cosmetic and can be monitored rather than repaired. For genuine excessive oil consumption, GM released updated higher-tension oil rings and a Napier second compression ring; severe cases require a ring job or short-block replacement. Regular oil-level checks and using the correct oil weight are the practical mitigations.

Typical repair cost:$0 - $5,000

Research This Issue

GoogleRedditYouTubeNHTSA
Community Reported
High ConfidenceVerifiedReviewed Jul 2026

On the 1993-1999 Pontiac Trans Am, the 1993-1999 (4th-generation) Firebird/Trans Am uses electric pop-up headlight motors with an internal nylon drive gear. The plastic gear strips its teeth over time, so the motor spins but the headlight fails to raise or lower, or the light finishes moving and the motor keeps grinding for several seconds. A loose motor housing accelerates the wear. The community regards this as a when-not-if failure. There is no NHTSA recall or GM TSB for the part, but it is one of the most universally reported nuisance failures on these cars.

This issue also affects: Chevrolet Camaro, Chevrolet Corvette, Pontiac Firebird

Common Symptoms

  • Headlight does not raise or lower
  • Motor spins/knobs turn but light stays put
  • Loud grinding or clicking for several seconds after the light moves
  • One headlight stuck up or down

How to Fix

Rebuild the original motor with an aftermarket brass or aluminum gear kit (both motors typically done together). As a temporary fix a stripped nylon gear can be rotated 180 degrees to expose good teeth. Re-secure the motor housing to prevent repeat failure.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • 1993-2002 Firebird/Trans Am brass headlight-motor gear repair kit

    Verify motor housing and linkage condition before ordering a second kit.

    eBay

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Typical repair cost:$30 - $350

Research This Issue

GoogleRedditYouTubeNHTSA
Community Reported
High ConfidenceVerifiedReviewed Jul 2026

On the 1990-1999 Pontiac Trans Am, t-top-equipped Trans Am/Firebirds (both 3rd-gen 1990-1992 and 4th-gen 1993-1999) commonly develop water leaks as the rubber seals age. The most frequent source is the U-shaped molding/weatherstrip around the top rear corner of the glass, which flattens and loses its shape after years of sun exposure and no longer seals against the glass, producing the classic wet-shoulder leak in heavy rain. Leaks can also drip into the interior and, over time, contribute to floor-pan moisture. It is an age/wear issue rather than a defect, but it is nearly universal on high-mileage T-top cars.

This issue also affects: Chevrolet Camaro, Chevrolet Corvette, Pontiac Firebird

Common Symptoms

  • Water dripping onto shoulder/interior in rain
  • Wet carpet or floor pan
  • Wind noise from roof at speed
  • Visibly flattened or cracked T-top seals

How to Fix

Replace the T-top and roof-rail weatherstripping with new reproduction seals (widely available from F-body/Firebird specialists), clean and re-seat the moldings, verify the T-top panels are properly adjusted/latched, and confirm the roof drain channels are clear.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • Firebird Central WEA-144K six-piece T-top weatherstrip kit

    1990-1992 Pontiac Firebird/Trans Am with factory T-tops within this record; select the original rubber or plastic drip-edge design. Not for aftermarket T-tops or 1993-up cars.

    Firebird Central
  • Firebird Central WEA-6 T-top door/body-frame weatherstrip pair

    1993-1999 Pontiac Firebird/Trans Am with factory T-tops within this record; pair for left and right body/door frames. Panel-mounted seals are separate WEA-16.

    Firebird Central
  • Firebird Central WEA-16 T-top panel side-rail seal pair

    1993-1999 Pontiac Firebird/Trans Am factory T-tops within this record; pair for both removable panels. Does not replace the body/opening pair.

    Firebird Central

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Typical repair cost:$150 - $600

Research This Issue

GoogleRedditYouTubeNHTSA
Community Reported
High ConfidenceVerifiedReviewed Jul 2026
🔧
A mechanic who knows YOUR exact car
Answers tuned to your year, make, model & trim — not generic advice. Save your garage so it always has the right context.
Get ahead of Pontiac Trans Am problems — free
Leave your email and we'll alert you the moment there's a new recall or known issue for your Pontiac Trans Am. Free, no account needed.

Don't see your problem? Describe your symptoms to get a diagnosis, or get a full repair guide.

Other Pontiac Models

Pontiac Bonneville21Pontiac G617Pontiac Grand Prix9Pontiac Solstice9Pontiac Firebird8Pontiac Grand Am8

Frequently Asked Questions

What are the most common Pontiac Trans Am problems?

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 1998 Pontiac Trans Am has 4 documented issues. The most frequently reported are: 4L60E automatic transmission 3-4 clutch pack failure, Early LS1 piston slap and high oil consumption, Pop-up headlight motor nylon gear stripping (4th-gen). Of these, 1 is rated critical and should be addressed promptly.

Is the Pontiac Trans Am reliable?

The 1998 Pontiac Trans Am has 4 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 1 issue is rated critical: 4L60E automatic transmission 3-4 clutch pack failure. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common Pontiac Trans Am problems?

Repair costs for known Pontiac Trans Am issues range from $0 to $5,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, 4L60E automatic transmission 3-4 clutch pack failure, typically costs $1,500-$2,800 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 1994-1999 Pontiac Trans Am 4L60E automatic transmission 3-4 clutch pack failure?

The 4L60E automatic (and its 700R4 predecessor) used across the 1990s Trans Am/Firebird is well known for burning up the 3-4 clutch pack. The 3-4 clutches see the highest load and heat, and failure is described by the F-body community and transmission specialists (Sonnax) as the… Repairs typically run $1,500-$2,800. Severity: high.

What is the 1998-1999 Pontiac Trans Am Early LS1 piston slap and high oil consumption?

The 1998-1999 Trans Am/Firebird WS6 introduced the aluminum-block LS1 5.7L V8. Early LS1 engines are known for cold-start piston slap, a metallic knock or rattle at startup that quiets once the engine warms up. The root cause is the cast-iron cylinder sleeves not expanding as muc… Repairs typically run $0-$5,000. Severity: medium.

Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.

Data compiled from NHTSA recalls, manufacturer TSBs, automotive forums, and AI-assisted research. No aggregated owner-report counts available for this vehicle yet.

What is the 1993-1999 Pontiac Trans Am Pop-up headlight motor nylon gear stripping (4th-gen)?

The 1993-1999 (4th-generation) Firebird/Trans Am uses electric pop-up headlight motors with an internal nylon drive gear. The plastic gear strips its teeth over time, so the motor spins but the headlight fails to raise or lower, or the light finishes moving and the motor keeps gr… Repairs typically run $30-$350. Severity: low.

What is the 1990-1999 Pontiac Trans Am T-top and roof weatherstrip leaks?

T-top-equipped Trans Am/Firebirds (both 3rd-gen 1990-1992 and 4th-gen 1993-1999) commonly develop water leaks as the rubber seals age. The most frequent source is the U-shaped molding/weatherstrip around the top rear corner of the glass, which flattens and loses its shape after y… Repairs typically run $150-$600. Severity: low.