The Chevrolet Blazer's gearbox has accompanied a line-up whose history began in 1969 with the K5, pitched against the Jeep Wrangler and the Ford Bronco. Alongside the off-road S10 Blazer, the Blazer was reborn in 2018 as a modern crossover, and has been available since 2023 in an all-electric Blazer EV variant. Renowned for its reliability, its transmission can nonetheless show signs of weakness. EDEN BOITES explains the steps to take for a stress-free repair.
What are the key features of the Chevrolet Blazer?
Thanks to its long lifespan, the Blazer has been fitted with many different transmissions. The 2018 version features a nine-speed 9T50 automatic gearbox, while older models offered three-, four- or five-speed manual gearboxes. One constant: rear-wheel drive, with only the rear wheels powered — a logical choice for the crossover segment. The engine range includes a naturally aspirated 308 bhp V6 petrol and a 228 bhp 2.0-litre four-cylinder.
How do you look after your gearbox to avoid breakdowns?
On a manual gearbox, the most common fitment on older Blazers, treat the clutch with care: press the pedal fully for a complete disengagement, avoid resting your hand on the gear lever, and change down one gear at a time. On an automatic gearbox, never select a gear while the vehicle is moving. In both cases, keep on top of transmission fluid changes: every 60,000 km on an automatic, and every 250,000 km or five years on a manual. Our guide on how a gearbox works explains the role of this lubricant in detail.
What are the warning signs of a gearbox problem?
- Excessive vibrations inside the cabin at certain speeds.
- Clunking or grinding when changing gear.
- A burning smell.
- A gear jumping out or refusing to engage.
- A general drop in performance.
- An oil leak beneath the vehicle.
Don't wait for the problem to worsen: describe your observations as precisely as possible to your mechanic to help them make an accurate diagnosis.
How do you repair the Chevrolet Blazer's gearbox?
A fault doesn't always mean a full replacement, which is reserved for cases of advanced wear. A new gearbox represents a significant outlay and lengthy lead times, while a second-hand unit offers no guarantee of its internal condition. EDEN BOITES offers you the best of both worlds with our reconditioned gearboxes sold on an exchange basis: fully overhauled by our experts and compatible with your model. If the reference you need isn't in stock, we'll recondition your own unit. Browse our gearbox catalogue.
For other models, see our guides on the Chevrolet Bolt gearbox and the Chevrolet SSR gearbox.
Frequently asked questions
Which gearbox does the Chevrolet Blazer have?
A nine-speed 9T50 automatic on the 2018 version, or three-, four- or five-speed manuals on older models. Your registration number will confirm the correct reference.
When should the gearbox oil be changed?
Every 60,000 km on an automatic, and every 250,000 km or five years on a manual.
Do your gearboxes come with a warranty?
Yes, with a warranty of up to 24 months. The exchange is offered on a satisfaction-or-refund basis in accordance with our Terms and Conditions.
Do you deliver across Europe?
Yes, we deliver throughout France and the European Union; lead times are confirmed on quote.
Why choose EDEN BOITES?
EDEN BOITES offers reliable, compatible reconditioned gearboxes with a warranty of up to 24 months, including collection of your old unit. We deliver throughout France and the European Union, with lead times confirmed on quote, and payment is available in instalments — pay in up to 10 instalments. Submit your request via our gearbox catalogue.
