Automatic Transmissions

Transmission Slipping Causes and What to Check

A transmission that revs before the vehicle accelerates is not a problem to “drive and see what happens.” Transmission slipping causes range from low fluid to internal clutch failure, and the longer a slipping unit operates under load, the more heat and debris it creates. Address it early to avoid turning a serviceable component problem …

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Transmission Rebuild Kit: What’s Inside, When to Buy One, and How to Choose

A transmission rebuild kit is a box of every friction, seal, and gasket your automatic transmission needs to be rebuilt. It’s how transmission shops and experienced DIYers bring a worn transmission back to life without buying a complete remanufactured unit. If you’re tearing into a 4L60E, 4L80E, 6L80E, or any other GM automatic, the rebuild …

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How Much Does a Rebuilt Transmission Cost? (2026 Price Breakdown)

Your transmission just died. The shop says “rebuild or replace,” and now you’re staring at a quote wondering if that number is fair or if they’re padding the bill. Let’s break down what a rebuilt transmission actually costs, what affects the price, and where to find the best value. Quick Answer — What You’ll Pay …

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4L60E Rear Planet Set Fitment and Failure Signs

A damaged 4L60E rear planet set can turn an otherwise routine transmission rebuild into a hard-parts failure if the problem is not caught before reassembly. Metal in the pan, a growling noise that changes with vehicle speed, stripped gear teeth, or a carrier that feels rough when rotated are all reasons to inspect the planetary …

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Rebuilt 4L80E Transmission: The Heavy-Duty Buyer’s Guide

The 4L80E is GM’s heavy-duty 4-speed automatic — the bigger, stronger sibling of the 4L60E. It went behind the 6.0L, 7.4L, and 8.1L engines in 2500 and 3500 trucks, full-size vans, and commercial vehicles. Where the 4L60E handles daily driving and light towing, the 4L80E was built for serious loads. When it finally goes — …

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Rebuilt 4L60E Transmission: Buyer’s Guide for GM Truck and SUV Owners

The 4L60E is GM’s most widely used automatic transmission. If you’ve owned a Silverado, Sierra, Tahoe, Suburban, Blazer, Camaro, or Corvette built between 1993 and 2013, your vehicle probably has one. And if you’re reading this, yours probably just failed. The good news: the 4L60E is the most supported, most available, and most affordable GM …

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Bad Torque Converter Symptoms: How to Tell Before It’s Too Late

Something feels off. Maybe your truck shudders at highway speed. Maybe the transmission slips for a split second when you hit the gas. Maybe there’s a weird whining noise coming from somewhere near the bellhousing and you can’t quite place it. If any of that sounds familiar, your torque converter might be on its way …

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GM ALLISON 1000 M742 5 Speed Automatic Transmission: A Reliable Powertrain Option

The GM Allison 1000 M742 is a robust 5-speed automatic transmission, designed to handle the demands of heavy-duty applications. Known for its durability and reliability, this transmission is often found in medium to heavy-duty trucks and SUVs. The Allison 1000 features a torque capacity that supports powerful diesel engines, making it an ideal choice for …

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