You’ve seen the pure joy on your kid’s face as they zip around on their Can-Am DS 90. Keeping that little quad running safely and reliably is priority number one. You’re probably on top of engine oil changes, but it’s easy to forget about its hardworking sibling: the transmission.
I get it. It’s a small component on a youth ATV, and it’s not always clear how or when to service it. Many owners overlook this critical fluid, leading to premature wear and tear.
This guide promises to change that. I’m going to walk you through a complete can am ds 90 transmission oil change, step-by-step, with the kind of tips you’d get from a seasoned mechanic. We’ll cover the tools you need, the exact process, how to avoid common mistakes, and why this simple 30-minute job is one of the best things you can do for the longevity of that ATV.
Why a Can-Am DS 90 Transmission Oil Change is Non-Negotiable
Before we grab the wrenches, let’s talk about the “why.” The transmission on your DS 90 is a gearbox filled with hardworking gears that are constantly meshing, spinning, and creating friction. The oil inside is its only line of defense.
Think of that gear oil as a multi-tasking superhero. It lubricates moving parts to prevent metal-on-metal grinding, it pulls heat away from the gears, and it suspends tiny metal particles that wear off over time.
But that oil doesn’t last forever. Over time, it breaks down from heat and shear forces, losing its ability to protect. This is where the benefits of a can am ds 90 transmission oil change really shine.
- Smoother Shifting: Fresh, clean oil allows the gears to engage more smoothly, making for a better and safer riding experience.
- Longer Component Life: Removing old, contaminated oil prevents accelerated wear on bearings and gears, saving you from a costly future repair bill.
- Improved Performance: A properly lubricated transmission operates more efficiently, ensuring power is transferred effectively from the engine to the wheels.
- Early Problem Detection: Inspecting the old oil can give you a heads-up about potential internal issues before they become catastrophic failures.
Gearing Up: Tools and Supplies You’ll Need
Having the right gear on hand makes any job easier and safer. You don’t need a professional shop for this, just a few basic tools. This isn’t the time to improvise—using the wrong tool is how bolts get stripped.
Essential Tools:
- Ratchet and Socket Set: You’ll likely need a 17mm or similar metric socket for the drain and fill plugs.
- Torque Wrench: This is highly recommended. Over-tightening can strip the aluminum case threads, turning a simple job into a nightmare.
- Oil Drain Pan: A dedicated pan is best to catch the old oil cleanly.
- Funnel: A small, clean funnel will make refilling mess-free.
- Nitrile Gloves: Keep your hands clean and protected from chemicals.
- Shop Towels or Rags: For cleaning plugs and wiping up any spills.
Required Supplies:
- Transmission Gear Oil: The Can-Am DS 90 typically requires an 80W-90 API GL-5 Hypoid Gear Oil. Always, always double-check your owner’s manual for the exact specification. Do not use regular engine oil.
- New Crush Washers: You need one for the drain plug and one for the fill plug. These are single-use items that create a perfect seal. Reusing old ones is a common cause of slow leaks.
The Ultimate Can-Am DS 90 Transmission Oil Change Guide: Step-by-Step
Alright, you’ve got your tools and supplies. Now for the fun part. This is the complete how to can am ds 90 transmission oil change process from start to finish. Take your time and follow along.
Step 1: Warm Up the ATV
Start the ATV and let it run for 3-5 minutes, or take it for a very short, gentle ride. This warms up the transmission oil, making it less viscous (thinner). Warm oil flows out much faster and carries more suspended contaminants with it.
Step 2: Locate the Transmission Plugs
Park the DS 90 on a level surface. On the left side of the ATV, near the shifter, you’ll find the transmission case. You’re looking for two bolts: the fill/check plug, which is located higher up on the side of the case, and the drain plug, which is at the very bottom of the case to allow all the oil out.
Step 3: Drain the Old Oil
Slide your drain pan directly under the drain plug. Now, here’s a pro tip: use your ratchet to loosen the fill plug first. This allows air to enter as the oil drains, preventing a vacuum effect and ensuring a smooth, fast drain.
Once the fill plug is loose, proceed to remove the drain plug completely. Be prepared for the oil to flow out. Let it drain for at least 5-10 minutes until it’s just a slow drip.
Step 4: Clean and Inspect the Drain Plug
While the oil finishes draining, take a clean rag and wipe off the drain plug. Most drain plugs have a small magnet on the tip designed to catch fine metal shavings. A small amount of metallic “fuzz” is normal wear.
However, if you see large chips or slivers of metal, that’s a red flag for a more serious internal problem. If that’s the case, it’s time to consult a professional mechanic. Remove the old crush washer from the plug.
Step 5: Reinstall the Drain Plug
Slide a new crush washer onto the clean drain plug. Thread the plug back into the transmission case by hand to ensure it isn’t cross-threaded. Once it’s snug, use your torque wrench to tighten it to the manufacturer’s specification (typically found in the service manual, often around 15-18 ft-lbs). Do not overtighten!
Step 6: Refill with Fresh Gear Oil
Place your funnel into the fill plug hole. The DS 90 transmission has a “fill-to-spill” design. This means you slowly add fresh 80W-90 gear oil until it reaches the bottom threads of the fill hole and just starts to trickle out. The ATV must be perfectly level for this to be accurate.
The total capacity is small, usually around 250-300ml (0.26-0.32 US quarts), so add it slowly to avoid overshooting the mark. Once it starts to seep out, it’s full.
Step 7: Reinstall the Fill Plug and Wipe Down
Let the excess oil finish dribbling out. Place a new crush washer on the fill plug, reinstall it by hand, and then torque it to spec. Use your shop towels to wipe down the transmission case and surrounding area, removing any spilled oil. A clean engine makes it easier to spot future leaks.
Common Problems with a Can-Am DS 90 Transmission Oil Change (And How to Avoid Them)
Even a simple job can go wrong. Being aware of the common pitfalls is half the battle. This section of our can am ds 90 transmission oil change guide will help you avoid the most frequent mistakes.
Stripping the Drain Plug or Case Threads
This is the most common and costly mistake. The aluminum case is soft. Always thread bolts by hand first and finish with a torque wrench. If you feel resistance when starting a bolt, back it out and try again. It’s not threaded correctly.
Using the Wrong Type of Oil
Engine oil and gear oil are not interchangeable. Gear oil has special extreme pressure (EP) additives needed to protect gears under high loads. Using the wrong fluid will lead to poor shifting and rapid transmission wear.
Forgetting the Crush Washers
Those little copper or aluminum rings are crucial. They are designed to crush slightly when tightened to create a perfect, leak-proof seal. Reusing an old, flattened washer is asking for a drip. They are cheap—always replace them.
Best Practices for Long-Term Transmission Health
A single oil change is great, but consistent care is what truly extends the life of your machine. Follow these can am ds 90 transmission oil change best practices for years of trouble-free riding.
First, stick to a schedule. Check your owner’s manual, but a good rule of thumb is to change the transmission oil at least once a year or every 25-50 hours of riding. If you ride in very muddy, wet, or dusty conditions, do it more often.
Second, make it part of your pre-ride check. Briefly glance at the transmission case for any signs of leaks or drips. Catching a small leak early can prevent a major failure on the trail.
Sustainable and Eco-Friendly Oil Change Practices
Being an off-roader means respecting the environment we love to ride in. A sustainable can am ds 90 transmission oil change is easy to do.
Used gear oil is a hazardous material and must never be poured down a drain or on the ground. It’s incredibly harmful to soil and groundwater.
The best eco-friendly can am ds 90 transmission oil change practice is to pour the used oil from your drain pan into a sealed container (like the empty oil bottle). Most auto parts stores, and many local recycling centers or mechanic shops, will accept used oil for recycling, completely free of charge.
Frequently Asked Questions About Your DS 90 Transmission
What type of oil does a Can-Am DS 90 transmission use?
The standard recommendation is a high-quality 80W-90 API GL-5 Hypoid Gear Oil. However, your model year may have a specific requirement, so always confirm with the owner’s manual for your ATV.
How often should I change the transmission oil on my DS 90?
The factory service interval is your best guide. As a general rule for a youth ATV, changing it once per season or annually is a solid maintenance plan that ensures maximum protection.
Is the engine oil separate from the transmission oil on a DS 90?
Yes, absolutely. The Can-Am DS 90 has a separate engine sump and transmission case. They use different oils and must be serviced independently. Confusing the two can cause serious damage.
What do I do if I see large metal chunks on the drain plug?
A small amount of fine, paste-like fuzz is normal. If you find distinct metal slivers or chunks, do not ride the ATV. This indicates a significant internal gear or bearing failure is in progress. The transmission needs to be inspected by a qualified technician.
Congratulations! You now have the knowledge and confidence to perform a perfect transmission oil change on your Can-Am DS 90. This simple act of maintenance is a huge step in protecting your investment and ensuring your young rider has a safe, reliable machine for years to come.
So grab your tools, follow the steps, and take pride in doing the job right. Stay safe on the trails and happy wrenching!
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