dgoodhue Posted November 12, 2018 Share Posted November 12, 2018 My GT awd hopped this morning on a 35F degree day while take a 90 turn backing out of the driveway. I am assuming it’s the Viscous Coupler that is locking. I cringe when the tires hop. I think it did this last year in fall on the leaves and some time in the snow/ice. When I drive down a house or two it doesn’t do it and take a turn. My GMC Syclone which also has a VC does as well, I don’t think the hopnis as bad but I aslo don’t drive it in really cold weather either. I don’t remember my 2.5i 6MT doing this. Does anyone else 6MT with the VC awd do this? Is this a sign my VC may need replacing? Link to comment Share on other sites More sharing options...
stewdogg Posted November 12, 2018 Share Posted November 12, 2018 I had to replace mine this summer, but I would get banging and slipping after things heated up from driving over 50mph for a while. A 10-15 min drive on the highway, then maneuvering at a gas station and it would start the banging. It sounded great cold. Things got worse over a month or two and it would start getting a slight pull all the time during slow speed turning in parking lots and what not. Was it possible the surface was slick somehow this morning? Link to comment Share on other sites More sharing options...
YeuEmMaiMai Posted November 12, 2018 Share Posted November 12, 2018 tire hop typically means broken mounts or worn suspension compoents Link to comment Share on other sites More sharing options...
dgoodhue Posted November 12, 2018 Author Share Posted November 12, 2018 The pavement was dry so it sound particularly horrible. It feels like it is the driveline binding to me. (I have been other cars with locked awd/driven is 4wd on pavement). I know that binding drivetrain will break parts. I parked in front of the house today so I would need to take a 90 turn at the end of the driveway. I am going to try take a a few small turns initially to see if need to loosened up. I am almost ready to put my GT away for the winter anyways. Link to comment Share on other sites More sharing options...
coco26 Posted November 12, 2018 Share Posted November 12, 2018 I have the same condition, and I've attributed it to my tires. It never did it with the factory tires, and it hasn't done it with my winters - but as soon as I put on my sporty summers and its gets below 35ish degrees, it usually hops once when backing out of a parking spot and never again until after a long cold soak (tires cool down). I'll be on my summers until thanksgiving, but I can update after that to confirm it doesn't happen with the winters. I think its just a product of summer compounds getting hard in the cold. Link to comment Share on other sites More sharing options...
dgoodhue Posted November 12, 2018 Author Share Posted November 12, 2018 That might be it. I have summer tires on my Legacy GT as well. Link to comment Share on other sites More sharing options...
FLlegacy Posted November 12, 2018 Share Posted November 12, 2018 Mine does this occasionally when backing out of a space, maybe it is just a combination of low speed and turning in reverse. I haven't noticed it going forward. Link to comment Share on other sites More sharing options...
copyboy311 Posted November 13, 2018 Share Posted November 13, 2018 Low-speed binding and hopping could be a sign of a failing VC. This happened on my 2003 Legacy with a manual transmission. I'm hoping it doesn't happen on my current 2011, as it's a rather expensive repair. Link to comment Share on other sites More sharing options...
FLlegacy Posted November 13, 2018 Share Posted November 13, 2018 Low-speed binding and hopping could be a sign of a failing VC. This happened on my 2003 Legacy with a manual transmission. I'm hoping it doesn't happen on my current 2011, as it's a rather expensive repair.This is specifically low speed in reverse and turning, for me, usually when there is a bit of dirt or leaves on the pavement. I can drive all day forward at the same speed and not have any binding. I would think a VC failure would show in either direction. Sent from my SM-G965U using Tapatalk Link to comment Share on other sites More sharing options...
copyboy311 Posted November 14, 2018 Share Posted November 14, 2018 My symptoms were binding and hopping in low-speed turns, such as when turning into a parking spot. I specifically remember it happening in forward gears, but not necessarily reverse, and it made a pretty rhythmic thump-thump-thump sound. If you're not noticing it on dry pavement, I wouldn't worry about it. Link to comment Share on other sites More sharing options...
dgoodhue Posted November 14, 2018 Author Share Posted November 14, 2018 Today, I did a sweeping turn instead of the usually hard 90 degree turn I normally do and it was fine. [i will remove my summer tire this coming weekend to see if that makes a difference.] The day I made this post, I was at my dad's house. The driveway is on a hill & the driveway has a bump at the end, so that may have been the right conditions for less the weigh on the front tire to allow it to slip as I made a hard 90 turn. Link to comment Share on other sites More sharing options...
mwiener2 Posted November 14, 2018 Share Posted November 14, 2018 Everything described is normal operation. Go drive your car and have fun, stop worrying. My Mods List (Updated 8/22/17) 2005 Outback FMT Running on Electrons Link to comment Share on other sites More sharing options...
Norm Peterson Posted November 15, 2018 Share Posted November 15, 2018 This is specifically low speed in reverse and turning, for me, usually when there is a bit of dirt or leaves on the pavement. I can drive all day forward at the same speed and not have any binding. I would think a VC failure would show in either direction. Not necessarily. Chances are, your turning in reverse is sharper (shorter radius turns) than when going forward. Something about when the forced difference in wheel speeds is greater the chances of this happening increase. Norm Link to comment Share on other sites More sharing options...
BBPeik Posted November 15, 2018 Share Posted November 15, 2018 My car does the same thing on my summer tires. Did it last night. Given I don't have a viscous center diff like you I am leaning towards tires. My rear diff is a bear until it warms up too, but tires seems to make a lot of sense. My someday I will be done with it thread. Link to comment Share on other sites More sharing options...
dgoodhue Posted December 7, 2018 Author Share Posted December 7, 2018 A follow up. I drove my car today on 30 degree day with the snow tires (instead of the summer tires I had on before) and I noticed the tire slipping didn't happen when backing up and taking a 90 degree turn. Link to comment Share on other sites More sharing options...
coco26 Posted December 8, 2018 Share Posted December 8, 2018 Also forgot to update, mine don't either with winters. Link to comment Share on other sites More sharing options...
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