Driveline

I’ve noticed that Chrysler is using a new eight-speed automatic transmission for rear wheel drive cars and trucks. I don’t understand how this is more efficient than a more typical […]

[All images/Jeff Smith] Axles aren’t usually a topic of great discussion—until one fails or otherwise needs replacing. If you think about these overlooked components, they are often severely abused and […]

Banging gears with a manual transmission is fun—if your clutch is up to the abuse, that is. When it’s time to replace or upgrade your clutch, these two dozen tried […]

What grinds your gears? Is it prematurely worn or chipped teeth? Or an ominous clunking sound? These symptoms can be signs of a fairly serious problem with your ring and […]

You’ve got questions. We’ve got the answers—the Summit Racing tech department tackles your automotive-related conundrums. This week, troubleshooting and troubled tranny. Q: When going up steep, muddy hills, the transmission […]

Produced from 1984 through 2001, the Jeep XJ Cherokee was a capable vehicle right from the factory. It came equipped with the 4.0L in-line EFI six-cylinder engine, a four-speed automatic transmission, a […]

The transmission is the little brother of the powertrain. It doesn’t often get the same respect or attention as the engine—until it starts acting up. You’ll most likely see dozens […]

Got questions? We’ve got the answers—the Summit Racing tech department tackles your automotive-related conundrums. This week, we cover the difference between close ratio and wide ratio transmissions and provide casting […]

Know what a torque converter does? Of course you do. It converts torque, right? It’s a converter of torque. It’s OK to admit you don’t fully understand what a torque converter does […]

Back in the day, if you needed the toughest, most-capable differential on the street, you ran a Detroit Locker.  When you want the same kind of differential today, the choice […]