redman Posted September 6, 2008 Share Posted September 6, 2008 someone else drove my truck. now when i shift from the low side (4th) to high side(5th) it grinds like crazy. synchros gone bad, air problem ?its a 18speed fuller. i hate when someone drives my truck !!!!!!!!!!!!!! Quote Link to comment Share on other sites More sharing options...
Rob Posted September 6, 2008 Share Posted September 6, 2008 someone else drove my truck. now when i shift from the low side (4th) to high side(5th) it grinds like crazy. synchros gone bad, air problem ?its a 18speed fuller. i hate when someone drives my truck !!!!!!!!!!!!!!Do you know who drove your truck as to find out a little more information about when the problem started, or if they noticed it, just before you whack their nuts off?Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment Share on other sites More sharing options...
other dog Posted September 6, 2008 Share Posted September 6, 2008 Do you know who drove your truck as to find out a little more information about when the problem started, or if they noticed it, just before you whack their nuts off?Robremember-dull knife = more pain....but I don't know what someone could have done to cause that problem Quote Producer of poorly photo-chopped pictures since 1999. Link to comment Share on other sites More sharing options...
Rob Posted September 6, 2008 Share Posted September 6, 2008 remember-dull knife = more pain....but I don't know what someone could have done to cause that problem from my limited experience with Fuller transmissions the sounds of it are that the sycronizer cage has either come apart, or broken. This can be caused by "hammering" gears with the shifter from inexperience, or abuse.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment Share on other sites More sharing options...
dak49 Posted September 6, 2008 Share Posted September 6, 2008 If I understand the question correctly, I think what Redman is talking about is when he makes a range shift from low to high.I have had the same problem before with the Fuller 13 speed as well, what can cause it is from shifting at too high a speed from high range to low range. I think there is a note on the shift pattern indicator that you are supposed to be below 25 MPH before shifting into low range.That doesn't help, but could explain what may have happened.Good LuckDak49 Quote Link to comment Share on other sites More sharing options...
HK Trucking Posted September 6, 2008 Share Posted September 6, 2008 Yup.Range shift synchronizer is shot.It'll keep working for a while, even though it's grinding.Then when the grinding goes on long enough to wear out the teeth, the range shift will jump out of gear when you put the power on. Quote "If You Can't Shift It Smoothly, You Shouldn't Be Driving It" Link to comment Share on other sites More sharing options...
terry Posted September 7, 2008 Share Posted September 7, 2008 Have to agree with H K the lo hi range needs rebuilt. terry Quote Link to comment Share on other sites More sharing options...
theakerstwo Posted September 7, 2008 Share Posted September 7, 2008 And on top of that if you get in there and find a pin broken in one of the synchro plates then look for a drive line virbration. If air ride the ride height could be off causing the ujoint angles to be off and causing a virbration. But broken pins is from a virbration. glenn Quote glenn akers Link to comment Share on other sites More sharing options...
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