Quantcast
Jump to content

  • Join Today, It's Simple and FREE!

    As a member, you can post in our forums, upload your photos and videos, use and contribute to our downloads, create your own member page, add your ATV events, and even start your own ATV club to host your own club forum and gallery.  Registration is fast and you can even login with social network accounts to sync your profiles and content.

mtbcates

1997 Polaris Scrambler 4X4 400 transmission Grinds in forward - Any ideas ?

Recommended Posts

Hi all , I have a 1997 Polaris Scrambler 400 4X4. It will not go into forward and if you keep at it and it does go into forward gear it will pop back out if you are going down a hill and your rpm's drop. It goes into Reverse very easy with no grinding. It grinds like crazy trying to get it into forward. You can hear it click into gear then all you hear is a light grinding in the transmission that get louder with the rpm's raising without going into gear. the 4X4 works fine.

Sometimes when you get it into gear it will stay in gear for awhile before popping out and sometimes it will stay in gear just a few minutes and then it takes anywhere from 5-30 minutes to get it to take forward again.

Before i tear the transmission down , does anyone have any ideas what i'm going to run into ?

Thanks for the help

Share this post


Link to post
Share on other sites


Well some ideas i have are: your rpms are set to high on ur carb the motor is working to fast at idle causing the gears in the tranny to move fast...and when you try putting it into gear your fork inside the transmission is having trouble grabbing the gears....The second idea is that you shift linkage needs adjusting its a simple fix...Third idea is that the fork used to select high gear is worn down really badly so it will not grab the gears as easy as it should...if i remember correctly there are to forks inside the transmission, one for reverse and high gear and one for low gear...so possibly the high gear and reverse gear fork needs to be replace...

Have you changed your transmission oil? were there metal shavings in it?

Edited by outlander560

Share this post


Link to post
Share on other sites

Thanks for the reply , the shift forks is sounding like the issue , the Rpm's are idled down low with no issue going into reverse. Checked the oil and it had no shavings in it that i could see. I'm going to pull the Transmission apart this weekend and try to find out whats going on with this forward gear.

I could only wish it is the linkage but I'm afraid it's more serious cause when it finally goes into gear you can hear the grinding after it goes into gear and of course it get louder with the rpm's.

Share this post


Link to post
Share on other sites

The grinding noise is probably a result of the gear not being fully engaged, that is also why it pops out. It is most likely the shift fork, but it would be worth your time to try adjusting the linkage to see if it helps.

Share this post


Link to post
Share on other sites

Look at the nut on top of the tras. May to be tighten. And the shift linkage

may need to be adjusted.

Share this post


Link to post
Share on other sites


hello mtbcates,

I was just browzing and ran across your post. You described the problem I was having to a tee. I just had to register so I could give you the exact answer to your problem. I am currently in the process of doing the same repair to my 1998 400 sport. If you have not already opened the tranny case or when you do you are going to find what they call the Forward Sprocket/gear and the Forward Engagement dog are damaged. They have little ears or (dogs) that get the edges ground away causing it not to engage properly. I ordered my parts from this site Motorcycle Parts, Motorcycle Accessories ? BikeBandit.com . They have great diagrams to show you the parts. My engagement dog was $95 and the Sprocket/gear was $68. hope this helps you and others with this same problem!

rc-11

Share this post


Link to post
Share on other sites
hello mtbcates,

I was just browzing and ran across your post. You described the problem I was having to a tee. I just had to register so I could give you the exact answer to your problem. I am currently in the process of doing the same repair to my 1998 400 sport. If you have not already opened the tranny case or when you do you are going to find what they call the Forward Sprocket/gear and the Forward Engagement dog are damaged. They have little ears or (dogs) that get the edges ground away causing it not to engage properly. I ordered my parts from this site Motorcycle Parts, Motorcycle Accessories ? BikeBandit.com . They have great diagrams to show you the parts. My engagement dog was $95 and the Sprocket/gear was $68. hope this helps you and others with this same problem!

rc-11

Good info, glad you registered. Be sure to stick around!:yes:

Share this post


Link to post
Share on other sites

I have a problem that finally did it today on my 98 scrambler 400 while pulling a snow tube, don't always pull a tube though, just playing too. I bought this atv 4 months ago. Had no problems with it then until the last few times I ran it. So I found this forum and decided to join it. I also have a gear grinding issue in forward gear, no issues in reverse or 4 wheel drive. Now gears are always grinding while in forward gear and shifter won't stay in gear too. Tried holding gear in forward, but it just grinds, no moving forward. So I drove the atv backwards in the snow cover yard all the way back inside my garage. So now I guess I will have to tear it apart to fix those gears. My question is what are the part list numbers for those gears and how long would it take to replace them? Thanks for your help...

Share this post


Link to post
Share on other sites

Sounds like you are having the same problems as everyone else, so, if you haven't already read the other posts in the thread. If you look on most any online parts store, they will have exploded parts diagrams with part #'s. Servicehonda.com, Babbitsonline.com, BikeBandit.com and Rockymountainatvmc.com all have these features, and all of them will have better prices than dealerships. Shop around, one place may have the best price on one part, but be a bit higher than other sites for other parts. As far as you question about how long it will take to fix it, that all depends on how experienced the person doing the work is, and what exactly you end up having to fix. If you find out any more detailed info about your problem, do tell us, it will help us help you. Good luck.

Share this post


Link to post
Share on other sites

My money is on the silent chain inside the transmission its the most common thing to go out but ive seen bent shift forkes before. If you crack it open Id replace the chain as well its less than 60.00 better to be safe than have to pull and do it all over again..

Good luck Polarisatvrepair.com

Share this post


Link to post
Share on other sites


My scrambler is working again. Had to replace the fork, 3/4 worned out. Also replaced the dog gear, all 3 contact points were gone, and another gear that connects with the dog. Found out it had no transmission fluid in it, it was leaking out. Had to replace the drain plug too, the heat with no tranny fluid fuzed the plug. But got it out. Also change out the filter and clean the carb too.

Share this post


Link to post
Share on other sites

I am also attempting the same repair now. what all will I need to remove off the quad to get to the gear box?

thanks for the help!!

Share this post


Link to post
Share on other sites

Lots of patience. I had to take off the whole engine and tranny together. First I disconnected all the plugs and hose to the tranny and engine parts. Took rear a-arm and axle out of the way, had to jack the rear end in the air to do this. Front drive shaft and whatever bolts were left for the assemble to be pulled out. Tight to lift the assemble out to side of 4 wheeler. I also took pictures of what eveything looks like before I started the job. The manual I had didn't have very good pictures which I found online for free, but don't know from where.

Share this post


Link to post
Share on other sites


Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Similar Topics

    • By Belmontie
      Hi bought this quad with a few leaks and other issues which thanks to excellent advice from these forums I thought I’d sorted them till I washed it down and found oil underneath. 
      It is coming from the seal around the gear changer pedal as it looks like someone has banged the housing flat on one side. Knowing how easily aluminium is broken I don’t wanna risk tapping it back into shape. Would a new seal fit or would the distortion of the housing render it useless.
      thanks in advance 
    • By JacobSlabach
      recently picked up some project bikes off CL for cheap.  got a honda fourtrax (the ancient 4x4 kind with the straight axle in the front as well as the rear and a back-up kick-start)  plastics are crap, but my goal is to get running like a champ and patch the plastics up and sell to one of my many friends that want a reliable 4x4 for dirt cheap and doesnt care what it looks like.
      so the former owner says it needs carb rebuilt, but its sat for 3+ years since so who knows.  things I see:  carb is missing (he gave me a box of parts along with the bike), engine turns over and feels good with kick-start, brakes need work, battery missing (That always puts me off, cause then I know most likely someone's been tampering with the electrical.
    • By Brittany Jones
      Yes I just got a 1998 polaris xplorer 400 4x4. Ran fine after hauling then died. Cleaned carb and put new fuel filter, hose, and new battery in. Starts 3 out of 10 times but will only run for a short time. Any suggestions?
    • By Brian Simmons
      The battery was gone when I bought the 90 .There are 7 wires 3 red 1 white ,1 black , 1 green and 1blue  . 1 red and 1 white are connected with connector like it`s suppose to go to the battery . I think it`s called an eye connector it`s round and has a hole in the center . So it can be bolted to the battery  and the same with the black wire  the one  black 1 has a connector on it that looks like it goes to the battery . that leaves me with 2 red wires , 1 green wire and 1 blue wire !!! Can anyone help me with a diagram of how the wiring goes to the battery on my 2002 Polaris Scrambler 90 ??? Please help me with this my e-mail address is [email protected] Pl
      Please help me with this . Thank you , Brian
    • By Kevin Vlogs
      Does anybody know how to determine which of the 2 key blanks fits my ATV. I have called several dealers, and Polaris and nobody seems to know which key fits which ATV. I thought with the ViN number they could look it up, but apparently not. I hate to spend the money at Polaris for a key blank and then pay a locksmith to cut it, but the locksmiths around me don't have the Polaris keys in stock. I find them on Amazon and places, but I can't tell which key blank is right for my ATV. Any help would be appreciated.
  • Similar Tagged Content

    • By RoxanneRoseReid
      Need a polaris manual for a 1994 2 stroke 2/4x4 quad free. can you please post a link I can click on Thank you. Roxanne
    • By buzzar56
      I am looking for a free repair manual for a 2003 Polaris sportsman 500 ho atv. all the posts on here lead me noplace
      thanks fred.
    • By Weldingrod47
      Trying to change front wheel bearings. I removed the cotter pin and castle nut. Hub won't budge. Is there an additional retaining clip? Seems to be one of those push on type that barbs on the thread of the spindle. How do I remove it?
    • By warkcol
      I am having an issue where it sounds like the gears are slipping if I hit the throttle really hard and also after letting off when the engine brake is applied. Also, the drive train that goes to the front also rides again the gear shift box. I will attach pictures and a video here shortly.
      Thanks in advance!
      [ame]
      [/ame]https://postimg.org/image/cdlu6fza9/
    • By izzydum1
      Any ideas on what would make a coil not fire? She was running fine, then began slow start. Now wont start at all.
  • Recently Browsing   0 members

    No registered users viewing this page.


×
×
  • Create New...