Rear Differential Diagnostics - Classic ATVs
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- čas přidán 31. 10. 2018
- PSA: Keep an eye out on your rear bearings! If something starts to make noise, attempt to repair immediately or a much larger issue can occur. This is a 1999 Big Bear 350 4x4 with a bad rear diff. This is what happens when there's low fluid, no fluid or bad bearings
Great video with solid advice. Thank you!
Step one of diagnosis: realising that's not a differential. It's a final drive. The only differential on that ATV and most ATVs, is on the front.
Hey huge thanks man. The only one thing I wanted to ask is I’m about to do maintenance on it and when I put the oil in I guess I feel it right up to that cap and I don’t even know where the front one is ha ha ha but I know it needs to be done.
Got a 350 rancher dirt cheap runs amazing they said it has a bad rear end seems to run awesome and great till i turn the wheels backwards a little fast it makes a awful crunch sounds
Awesome video
thanks!
I'm stuck trying to figure out how to take axle off as I snapped rear axle can you upload that?
Maybe you can help me. Im working on my 2009 suzuki king quad 400 4x4. Was going to do the back brakes but they still look new. I thought it was the brakes. Last yr right before I put it up for the winter I started to heae this....tink tink tink...from the back. So not the brakes. My axle on the right rear moves around. I can take it in hand an push it in almost a full inch. Ive never seen that. But it still spins like it should etc. Any thing will help. Not maybe videos for 09 400s lol
How can I put new bearing in my rear diff? Do you have a video
Where does the hose on it go to? On mine kts cut and I'm trying to find where it goes
Hello I've got a 1989 Big Bear 350 that I purchased off a neighbour it runs well it drives well but there is a Creek in the rear end I'm not sure what the problem is do you have any idea
Hi there ! I have a yamaha grizzly 660 from 2005. The rear diferential stays blocked, and i can't schifted off. What should i do? Thanks !!
Do you know if you can change the rear axle seal (side where fill plug is) while the axle is still on? or does the whole axle need pulled? I was thinking I can get away with installing it while together but asking
I want to know also.
Did you get it done without taking the axle out?
I have an all time 4x4 Honda 450 and the front wheels are the only thing pulling could this be the reason?
What is the part number on the whole diff
So I just got a 1999 Yamaha Kodiak. Similar setup. I have changed the differential seals on both sides. Now I'm still noticing leaking fluid after riding for a bit out of the left side free floating axle. Any ideas after I have checked the bearings and the seal is new so I can't understand where that fluid is coming from.
Did you ever find the cause to your leak? I am having same issue.
What size battery do you use i need one for my kodiak?
Great advice!
We have a 2001 Big Bear 400 Professional. It has less than 2000km on it. We mainly use it to haul logs and wood and whatnot. Last year, we installed tracks on it to be able to use it in the snow.
Lately it started having issues when reversing. When we press the rear break and engage the lever in reverse, it takes time before completely engaging. Once it does, it will make some kind of knocking sound when reversing and sporadically it will very briefly slip.
It won't ever do it going forward, on in reverse. It this a common problem? What do you think we should look for first?
tracks are very harsh on the drivetrain. this sounds mostly transmission related, hopefully you figured it out by now!
We Try Motorsports : @ 1:10 thats a seal not a bearing .torched it too hot solidified the grease here. @ 1:31 they torched it to hot to remove the bearings , you can see the smoked aluminum coloring . can you guys see that ?
Great video. I have a 97 big bear 350 4x4. My rear differential has a nipple and line leading into the top. I followi it up towards the front, and it ends just in front of the fuel tank. Attached to nothing. Any idea what or if it was attached to anything? Thanks
Vent line just to keep watter out
Question: I have a 2005 magnum 330 4x4. Low torque and won’t go over 20-25 mph in high gear. While up on jacks, I can see the rear axle is wobbling like it’s bent or has bad bearings. Clutch cover is off, clutches seem to be shifting properly and no belt slippage. Drive shaft seems to be putting out good rpm, but the wheels turn slowly in comparison. No obvious grinding or clicking from the rear diff, but I’m thinking that’s where the problem lies. Thoughts, ideas, suggestions?
After reading the question a few times, seems like you worded it in a way where you were looking at this being the explanation... However, the bent axle is unlikely mission of a broken differential. Would be the indication of a bad rack and pinion or differential would be noise in the rear or obvious leaks. However if there's no noise it's unlikely. if you're absolutely convinced it's the rear, take the fill screw out and put a pinhole camera down there and see what it looks like. there's absolutely no way to tell what's wrong with your machine unless you dig into it unfortunately. Regardless, if the axle is bent you need to do work on the rear one way or the other take it apart and see what it looks like. Good luck!
@@WeTryMotorsports Haha. Yeah, as I typed it out, I realized it didn’t come out the way I initially intended. Thank you for the speedy reply. As usual, these things are never straight forward.
@@WeTryMotorsports And no, I’m not absolutely convinced. It just appears to be very unlikely to be clutches or belt. Could it be transmission?
Hey there I just got parts for mine and the rear axle splines are off set more compared to my other its 1998 big bear 4x4 .. any ideas??? Please help
Well first of all, is your machine modified at all? It's pretty rare but it does happen. Second, make sure you get the right year pinion and spline. I do know that the 80s and early 90s do not fit the mid and late 90s. If you bought the innards new, you can always return for ones that fit. Without seeing it's really tough to tell otherwise. Good luck!
@@WeTryMotorsports thanks for fast reply man!
The 1 he sent me was for 96 mines 98 I believe the issue is only 97 98 99 will work
What does it mean if it sounds like metal is crushing in my rear end when I try to put my four wheeler in gear
Its toasted..time 4 rebuild
Sounds like you have a steel shaft up your ass!!
Clapped diff most likely
My 2002 bear tracker just started leaking from the drive shift seal how bad is it to change it
Daniel Williams its a pretty big change but it should be done
Hey mate if you or someone could help us out I’m trying to find out how much oil to put in the rear diff of the my Suzuki quad runner 500cc I can’t find an overflow anywhere much appreciated if you can thanks
Middle top and bottom bolt on case. Top is fill. Middle is check and bottom is drain
Can someone help me. I have a linhai 300 it ia a japanesse 4x4 and a strange sqeak comes from the back diff area and most of the time the back wheels jam up and other times they become really hard to turn , what can it be?
Diff is clapped most likely
got a leak in the rear of my 1999 Yamaha 350 Wolverine. Any ideas? Don't see any stress cracks.
clean it off complete, ride it and see where it's starting to leak from. most likely this is seals
dear sir i see you do not have a breather plug on the top myne dose not .. ..is this normal or ok 2:44
What do they recommend for diff fluid?
I normally use 80w90 for ATVs.
Does it have to be ATV fluid .....wouldn’t automotive be the same?......and how much goes in there?
@@swaycooler I am 95% sure it would be fine. ATV marketing is something they came out with in the last 10 yrs to make a few additional dollars to reg oil.
Usually you fill it to the plug hole & it starts to come out
Says SEA 80 hypo gear....
They recommend SEA hypo gear fluid
Can you use car engine oil as engine oil in a quad
sure can, just make sure you get the right weight
If your atv has a wet clutch then absolutely not, you will eventually kill the clutch, you need wet clutch compatible oil, i forget the rating label.
Some car oils are rated for wet clutches makes sure its rated for that
Hi, just wondering if you would be able to help me out, I’ve got a 2012 Yamaha Grizzly it done round 8000miles and it’s in pretty good condition. But it’s got an overheating problem it tends to over heat just after 10 minutes of riding, it starts back out again after 5 minutes. Do you have any idea what can cause this. It doesn’t have a fan it just got a oil cooler on the front.
What size grizz?
350 4x4 automatic
@@matthewlewis7696 if you have sufficient oil, check your oil filter first to see if there are debris lodged. Definitely change that out, and check to see if there are any leaks or poor quality oil in the system. Check all gaskets. Simple stuff first
Ok thanks
Thoses aren't cracks just casting marks 😂
Some are marks, most were hairline cracks. Those is obvious due to the leaks
Have a polaris magnum. both main drive shafts spin but doesn't move at all. Guessing both diffs are blown. Fuck!!!
I have a 1997 big bear not start will turn over
Test the big four: spark, compression, air, fuel. That's pretty much it
I have a Yamaha 250cross country looking for a rear end I took it to a guy and he said it would take about 500. Dollars to fix.I don’t have that kind of money I would like to buy a rear end CHEAP