Sidecar driveshaft loose?

Are ya having a problem with your rig? We'll try to help. Share your tech tips and experiences here. Dr. Billy Glaser, author of the "Unofficial 750 Ural Service Manual" site myural.com, is moderating this section.
Forum rules
Here is the place for you to ask questions about or share your experiences about servicing or repairing your Ural or Dnepr. Please post topics concering modifications or accesories in the "Modifications and Acessories" section. Please post oil related questions in the "Oil Threads" section.
User avatar
epix
Party Member
Party Member
Posts: 192
Joined: Sun Feb 10, 2013 8:58 pm
Location: Michigan

Sidecar driveshaft loose?

Post by epix » Wed Aug 10, 2016 2:27 pm

Today while pulling in the parking lot at work traveling 10mph or so I could hear my driveshaft axle rattle around a bit on my 2011 Gear-Up.

I was in 1WD (rarely use the 2WD) when I heard the noise.. when I parked I grabbed the axle near the u-joint where it connects at the final drive and it would wiggle an half-inch or so in an up/down motion.. is that normal or should it be tight?

Bike seems to feel fine when cruising on the road, just odd this is the 1st time I've noticed the rattle. When going down the road in 1WD mode the driveshaft axle appears to be rotating in a smooth motion.
Last edited by epix on Wed Aug 10, 2016 11:18 pm, edited 1 time in total.
2018 Ural Gear Up - Terracotta Metallic - TOTALED
2011 Ural Gear Up Forest
1997 Ural Sportsman 2WD (Type 3 Ignition) - SOLD
2008 Yamaha WR250R (306cc kit)
2018 Honda Grom
1975 Honda CB200

User avatar
berger
Order of Victory
Order of Victory
Posts: 6572
Joined: Tue Jul 31, 2007 10:33 am
Location: Canada

Re: Driveshaft axle loose?

Post by berger » Wed Aug 10, 2016 2:33 pm

Need a little clarity as your axle and drive shaft are two very different things and I am having a hard time picturing what you mean. Your axle, the steel rod that goes through each wheel, should not have any play. The stub axle on the hack wheel may rotate some, but that is an indication of worn splines.

Your drive-shafts may have some play due to the u-joints, but they shouldn't "rattle" either.
Berger

2007 Ural Patrol (1st Owner)
Many, Many Mods.

User avatar
Msblu79
Order of Lenin
Order of Lenin
Posts: 2017
Joined: Mon Sep 13, 2010 8:00 pm
Location: Invading Upstate NewYorkastan

Re: Driveshaft axle loose?

Post by Msblu79 » Wed Aug 10, 2016 2:45 pm

There shouldn't be any excessive play in the u-joints, driveshafts, etc. Small amounts of play in the donut or spline connections is OK but otherwise everything else should be reasonably tight. U-joints should have very little axial or radial play. The play between the pinion and ring gear should only be a couple of degrees. Nothing in the drivetrain should have a 1/2" of play, something is worn out or broken. :?
2010 Black Patrol 95,000km's

User avatar
epix
Party Member
Party Member
Posts: 192
Joined: Sun Feb 10, 2013 8:58 pm
Location: Michigan

Re: Driveshaft axle loose?

Post by epix » Wed Aug 10, 2016 2:47 pm

Bad wording.. the shaft I'm speaking of is what I call the 2wd drive shaft.. has the accordion boots on each end and connects from the final drive out to the sidecar wheel.

I'll take a short video tonight of the shaft play.
2018 Ural Gear Up - Terracotta Metallic - TOTALED
2011 Ural Gear Up Forest
1997 Ural Sportsman 2WD (Type 3 Ignition) - SOLD
2008 Yamaha WR250R (306cc kit)
2018 Honda Grom
1975 Honda CB200

silverdog
Comrade Colonel
Comrade Colonel
Posts: 399
Joined: Sun Oct 28, 2012 12:44 pm
Location: Eastern oregon

Re: Driveshaft axle loose?

Post by silverdog » Wed Aug 10, 2016 4:24 pm

The slip yoke on 2wd drive line is pretty sloppy on the ones I have seen.
2012 gobi

User avatar
epix
Party Member
Party Member
Posts: 192
Joined: Sun Feb 10, 2013 8:58 pm
Location: Michigan

Re: Driveshaft axle loose?

Post by epix » Wed Aug 10, 2016 7:48 pm

Uploaded the video. Shook the driveshaft at a few diffent places.. seems pretty secure at the u-joint itself. Moves a little bit right at the final drive just forward and back (seems normal), and the shaft itself is does move around a bit but it does make a bit of sense as it would need to do so when riding in rough terrain.

2018 Ural Gear Up - Terracotta Metallic - TOTALED
2011 Ural Gear Up Forest
1997 Ural Sportsman 2WD (Type 3 Ignition) - SOLD
2008 Yamaha WR250R (306cc kit)
2018 Honda Grom
1975 Honda CB200

User avatar
cateyetech
Hero of the Soviet Union - 2020
Hero of the Soviet Union - 2020
Posts: 1562
Joined: Sat Jan 05, 2013 8:23 am
Location: 72801 Russellville Arkansas
Contact:

Re: Driveshaft axle loose?

Post by cateyetech » Wed Aug 10, 2016 8:08 pm

Looks like the u joint on the side car wheel end is bad.

User avatar
Albuquralque
Order of Victory
Order of Victory
Posts: 19684
Joined: Thu Jul 19, 2007 2:46 pm
Location: Albuquerque, NM

Re: Driveshaft axle loose?

Post by Albuquralque » Wed Aug 10, 2016 8:29 pm

Too much play IMHO
"Put a little gravel in your travel"


Previous Urals Owned: 2004 Wolf, 2006 Tourist, 2006 Patrol (TOW), 2006 Patrol (TOM), 2014 Patrol

User avatar
Buckhorn
Comrade General
Comrade General
Posts: 583
Joined: Thu Sep 24, 2015 11:16 pm
Location: South of Canada, East of New York

Re: Driveshaft axle loose?

Post by Buckhorn » Wed Aug 10, 2016 8:49 pm

Albuquralque wrote:Too much play IMHO
+1
2013 Ural Gear Up Gobi camo
Raceway 2 into 1 right side high exhaust, with Two Brothers muffler
Dimple drain plugs
Shorty left side directionals
2010 Harley Fat Boy
:)

User avatar
epix
Party Member
Party Member
Posts: 192
Joined: Sun Feb 10, 2013 8:58 pm
Location: Michigan

Re: Driveshaft axle loose?

Post by epix » Wed Aug 10, 2016 10:06 pm

Just checked the U-Joint on the sidecar tire side.. it's quite solid. The pusher side does have a bit of play to it.

I removed the rubber accordion boot and scraped away at the grease which was pretty dry (almost mud like) The splines on the "male" portion seem all intact, but "female" portion feels a bit loose (similar to an ex-gf :lol: ) Anyways, how tight should the spline junction be?

Uploaded video below
2018 Ural Gear Up - Terracotta Metallic - TOTALED
2011 Ural Gear Up Forest
1997 Ural Sportsman 2WD (Type 3 Ignition) - SOLD
2008 Yamaha WR250R (306cc kit)
2018 Honda Grom
1975 Honda CB200

User avatar
Albuquralque
Order of Victory
Order of Victory
Posts: 19684
Joined: Thu Jul 19, 2007 2:46 pm
Location: Albuquerque, NM

Re: Sidecar driveshaft loose?

Post by Albuquralque » Thu Aug 11, 2016 12:05 am

Way too much play on the splines.

Sidecar driveshaft isn't cheap.....:lurker:
"Put a little gravel in your travel"


Previous Urals Owned: 2004 Wolf, 2006 Tourist, 2006 Patrol (TOW), 2006 Patrol (TOM), 2014 Patrol

User avatar
Albuquralque
Order of Victory
Order of Victory
Posts: 19684
Joined: Thu Jul 19, 2007 2:46 pm
Location: Albuquerque, NM

Re: Sidecar driveshaft loose?

Post by Albuquralque » Thu Aug 11, 2016 12:06 am

If your not going to run in 2wd, you can remove the driveshaft at each u-joint and run with out it until you get a replacement.
"Put a little gravel in your travel"


Previous Urals Owned: 2004 Wolf, 2006 Tourist, 2006 Patrol (TOW), 2006 Patrol (TOM), 2014 Patrol

User avatar
n3303j
Hero of the Soviet Union - 2020
Hero of the Soviet Union - 2020
Posts: 2938
Joined: Mon Jan 05, 2009 5:10 pm
Location: Eastern , MA

Re: Sidecar driveshaft loose?

Post by n3303j » Thu Aug 11, 2016 12:39 am


Your video led to this one (and several with babes in bikinis). This looks like an exposed view of your problem. But your video looked like there was some play in the drive side universal also. The universal should be free of visible play.
Ron Cichowski

1998 Moto Guzzi V11 EV STOCK
1996/2014 Ural Sportsman.
Severely Upgraded, Modified and Remanufactured.
1977 Moto Guzzi 850 T3-FB ALMOST STOCK

User avatar
VWK75S
Hero of the Soviet Union - 2020
Hero of the Soviet Union - 2020
Posts: 4923
Joined: Fri Jan 01, 2010 9:25 am
Location: Sebago Lake Maine

Re: Sidecar driveshaft loose?

Post by VWK75S » Thu Aug 11, 2016 5:10 am

Looks too short.
John
The Ural's made Maine a much bigger state.

2009 GearUp 155,000kms
2007 Retro 25,000kms
1991 VWK75S 110,000miles

User avatar
Msblu79
Order of Lenin
Order of Lenin
Posts: 2017
Joined: Mon Sep 13, 2010 8:00 pm
Location: Invading Upstate NewYorkastan

Re: Sidecar driveshaft loose?

Post by Msblu79 » Thu Aug 11, 2016 8:25 am

I am no expert in this all but to me it seems that the sidecar frame is setup to far away from the FD allowing the shaft to be over extended. There should only be about 2" of splines exposed under the boot. :?
2010 Black Patrol 95,000km's

Post Reply