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Ready for Diff Fluid Change

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17K views 14 replies 9 participants last post by  JT@HOME  
#1 ·
Getting ready to change the diff oil on 2017 CVT trek. Can someone confirms the torque specs for all the fill, drain plugs?
The diff were last serviced by dealership tech. From my observations they like to over torque almost everything. I was just wondering if I can use an impact wrench on low to loose the plugs? Can anything get damaged by using IW on plugs?Alternatively I will get a 24” breaker bar. and do it the “safe way”. I will use my torque wrench when installing the plugs with new washers. I just don’t have more use for a extra tool.
 
#5 ·
It is my opinion that using an impact to remove bolts can be safer than a breaker bar, because maybe the short impacts are less likely to round anything out/sheer anything off than slower constant torque. But I don't have any facts to back that up. I am just a guy who like to ugga dugga. I did personally do all of these on my 2013 both with and without an impact, and never felt sketchy either way.
 
#7 ·
Did mine this summer. Factory torque was tight but breaker bar snapped them loose. The Aluminum housing is soft, stay away from impact. I also stripped the rear drain plug due to confusing Nm for ft/lbs. Does not take much to strip the soft threads on the diffs. In fact I had my mechanic help me with the front diff and he used his digital Snap On torque wrench and it felt way too tight so he just snugged it up. No leaks so far.
When I do mine the next time I will only snug the plugs, no torque wrench.

I found the new diff fluid made big difference in overall smooth driving experience.

Good luck with everything.
 
#10 ·
don't do like my buddy who smashed himself in the face when the breaker bar slipped. haha

i also haven't used a torque wrench for the diff. you can definitely feel the gasket seating in by hand. not sure what i would do if my model used the three-bond adhesive listed in the procedures above though.