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How much HP can a 4L80E really handle? We break down stock vs. built 4L80Es, weak points, hard-part upgrades and what matters as power climbs.

TH350 to 200-4R Swap: Add Overdrive Without Reinventing the Whole Car If you've got a TH350 in an older GM and love the car but hate listening to the engine scream down the highway, a 200-4R swap deserves a serious look. The TH350 is simple, proven and has been doing its job for decades.H350 to 200-4R Swap: Add Overdrive Without Reinventing the Whole Car If you've got a TH350 in an older GM and love the car but hate listening to the engine scream down the highway, a 200-4R swap deserves a serious look. The TH350 is simple, proven and has been doing its job for decades.H350 to 200-4R Swap: Add Overdrive Without Reinventing the Whole Car If you've got a TH350 in an older GM and love the car but hate listening to the engine scream down the highway, a 200-4R swap deserves a serious look. The TH350 is simple, proven and has been doing its job for decades.H350 to 200-4R Swap: Add Overdrive Without Reinventing the Whole Car If you've got a TH350 in an older GM and love the car but hate listening to the engine scream down the highway, a 200-4R swap deserves a serious look. The TH350 is simple, proven and has been doing its job for decades.H350 to 200-4R Swap: Add Overdrive Without Reinventing the Whole Car If you've got a TH350 in an older GM and love the car but hate listening to the engine scream down the highway, a 200-4R swap deserves a serious look. The TH350 is simple, proven and has been doing its job for decades.

4L60E vs 4L80E: Which Transmission Is Right for Your Build? Ask the internet whether you should run a 4L60E or 4L80E and you'll usually get one of two answers: “A built 4L60E is fine.L60E vs 4L80E: Which Transmission Is Right for Your Build? If you're building a GM truck, LS-swapped classic, street car or performance vehicle, sooner or later you're probably going to hear the same question: Should I build the 4L60E or swap to a 4L80E?

You changed a brake light bulb. Now your torque converter won't lock up.

KEEP IT COOL: WHY TRANSMISSION TEMPERATURE MATTERS Your transmission can have upgraded clutches, reinforced hard parts, a billet torque converter, and every performance upgrade available—but if it cannot control heat, none of those parts are invincible. Heat is one of the biggest threats to an automatic transmission.EEP IT COOL: WHY TRANSMISSION TEMPERATURE MATTERS Your transmission can have upgraded clutches, reinforced hard parts, a billet torque converter, and every performance upgrade available—but if it cannot control heat, none of those parts are invincible. Heat is one of the biggest threats to an automatic transmission.our transmission can have upgraded clutches, reinforced hard parts, a billet torque converter, and every performance upgrade available—but if it cannot control heat, none of those parts are invincible. Heat is one of the biggest threats to an automatic transmission.

The Role of Gear Ratios in Real Performance Builds A build with real power needs more than horsepower. It needs a drivetrain that actually uses it.he Role of Gear Ratios in Real Performance Builds A build with real power needs more than horsepower. It needs a drivetrain that actually uses it.he Role of Gear Ratios in Real Performance Builds A build with real power needs more than horsepower. It needs a drivetrain that actually uses it.he Role of Gear Ratios in Real Performance Builds A build with real power needs more than horsepower. It needs a drivetrain that actually uses it.he Role of Gear Ratios in Racing Performance A build with real power demands a drivetrain that reacts the moment you call for speed. Serious drivers chase a hard launch, and they need a machine that puts every bit of torque to work.he Role of Gear Ratios in Racing Performance A build with real power demands a drivetrain that reacts the moment you call for speed. Serious drivers chase a hard launch, and they need a machine that puts every bit of torque to work.he Role of Gear Ratios in Racing Performance A build with real power demands a drivetrain that reacts the moment you call for speed. Serious drivers chase a hard launch, and they need a machine that puts every bit of torque to work.he Role of Gear Ratios in Racing Performance A build with real power demands a drivetrain that reacts the moment you call for speed. Serious drivers chase a hard launch, and they need a machine that puts every bit of torque to work.he Role of Gear Ratios in Racing Performance A build with real power demands a drivetrain that reacts the moment you call for speed. Serious drivers chase a hard launch, and they need a machine that puts every bit of torque to work.

Manual vs. Automatic Racing Transmissions: Which One Wins on the Track?anual vs. Automatic Racing Transmissions: Which One Wins on the Track?anual vs. Automatic Racing Transmissions: Which One Wins on the Track?anual vs. Automatic Racing Transmissions: Which One Wins on the Track?

Muscle Car Transmissions: What Makes Them Different? Dropping the hammer on a big-block engine is like a straight shot of pure adrenaline – that is, until the drivetrain snaps under all the pressure.

Top 5 Signs Your High-Performance Transmission Needs an Upgrade Nothing pulls you in like a transmission that hits hard and responds the moment you roll into the throttle. But commanding a car with massive horsepower puts every part of your drivetrain under intense pressure.