PowerTrax No-Slip Ford 9" Differential Locker 31 Spline -Fits Open Differential | Compatible for Ford, Lincoln, Mercury | Replaces Eaton 187SL17B, Auburn Gear 542036 | Heavy-Duty Performance

I installed this in a Dana 60 in a E350 van almost a year. It has worked very well for me.I don’t really notice it there. When shifting between forward and reverse, you can feel a bit of looseness in the drive train, as it unlocks and then locks up in the other direction. I noticed a very slight pull towards straight in curves when it was first installed, but only because I was looking for it. I don’t notice it at all now. I installed a locker because the van got stuck a couple times on muddy dirt roads. The alternate was to buy a 4x4 truck, so this saved $60k. I’ll get a 4x4 when this 1995 van dies, but the 7.3 diesel is still going strong so it may be awhile .