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Monster TH350
Legendary 3-speed with smooth shifts and stout internals. The go-to for first- and second-gen Firebirds for street and track duty.
Shop TH350
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Pontiac Firebird Transmissions
Classic Firebird or modern muscle—Monster builds deliver power, reliability, and precision. From first-gen icons to late-model LS cars, every unit is engineered for street cruising and weekend strip duty.
Built For Street & Strip
We target the known GM weak points with upgraded internals, calibrated hydraulics, and matched torque converters. Expect crisp shifts, controlled temps, and long-haul durability—no drama, just speed.
Monster 4L60E
Electronic 4-speed with refined shift quality and improved efficiency—ideal for third- and fourth-gen Firebirds.
Shop 4L60EMonster 4L65E
Performance upgrade over 4L60E with reinforced internals and higher capacity—perfect for late-model LS Firebirds.
Shop 4L65EWhy Firebird Owners Choose Monster
Real upgrades. Real testing. Real experts to help you spec it right.
Upgrades Beyond Stock
Corrects GM weak points (3-4 clutch, servo apply, hydraulics) with stronger internals and calibrated pressure.
Matched Torque Converters
Converter stall and lockup tuned to your engine, gears, tire size, and use case—keeping heat in check.
Dyno-Tested Confidence
Every unit is dyno-tested before shipping to verify shift quality and pressure rise.
Street & Strip Proven
From cruiser builds to bracket racing—packages tailored to your Firebird’s goals.
Warranty Options
Strong baseline coverage with extended options for high-mileage or higher-power combos.
Expert Product Specialists
Talk to people who build and test transmissions daily. Get it right the first time.
Which Transmission Do I Have?
Use model year and engine as a quick guide. Always verify on the vehicle when possible.
| Transmission | Typical Firebird Applications | Common Years |
|---|---|---|
| TH350 | 1st & 2nd Gen Small-Block builds (street/strip) | ~1969–1981 |
| 700R4 | OD swap option for late 2nd Gen & early 3rd Gen builds | ~1982–1992 |
| 4L60E | 3rd/4th Gen EFI (electronic 4-speed) | ~1993–2002 |
| 4L65E | Higher-output LS applications / performance upgrade | ~2001–2006* |
*Year ranges vary by model/trim—verify by RPO/ID tag or consult our specialists.
Firebird Transmission Tech Tips
Classic Firebird builds benefit from overdrive swaps for lower cruise RPM and cooler temps, while electronic 4L60E/4L65E cars respond well to added clutch capacity, upgraded servos, and calibrated valve body work to handle bolt-ons and sticky tires. Converter selection matters—stall that’s matched to your cam and gearing improves launch feel without excessive heat.
Every Monster build is tailored to your rear gear ratio, tire size, weight, and power level for predictable lockup, crisp shifts, and temperature control—whether you daily your Firebird or chase ETs on the weekend.
Firebird Transmission FAQ
Answers to common Pontiac Firebird transmission questions.
Which Monster build level should I choose?
Stock or bolt-on street cars do great with StreetMonster. Add sticky tires, aggressive cams, or a power-adder and step to TrackMonster. We’ll match the converter and calibration to your combo.
Do your 4L60E/4L65E builds fix the usual weak points?
Yes—our packages increase 3-4 clutch capacity, upgrade servos, and address valve body leaks for durability under spirited use and occasional strip passes.
Will overdrive help on the highway?
Absolutely. Overdrive drops cruise RPM for cooler temps and better mileage—especially helpful on classic Firebirds with deeper rear gears.
Is a torque converter included and matched?
Yes. We match stall and lockup to your cam, compression, gears, tire size, weight, and intended use for strong launches and efficient cruising.
What’s lead time like?
Popular Firebird units are often in stock. Lead time depends on model and build level—check the collection pages or call for current availability.