ACDelco GM Original Equipment 10-5055 Gear Marking Compound - 1 oz

I tried Prussian Blue and couldn't get a readable pattern on the gear. This gear marking compound made it so much easier and honestly goes a long way. I painted 5 teeth at least 8-10 times trying to get everything set to the best possible position. This runs off fairly easily when the ring and pinion gear make contact so I can see the pattern very well. Only downside is it doesn't come with a brush, but that's easy to grab at any store so it doesn't affect the review.

Its the only one I could get next day so I ordered it. It works good and will probably last me a life time since I don't rebuild rear ends too often.

Works as it should, enough in the tube to do many jobs. Only takes a very little to get job done

Worth the money and worth the 2-3 day shipping time. This contains enough to do many applications. The best part is that it goes on very easily without needing to be cut with oil. It seems like it will have a decent shelf life in the tube it’s in. I painted 3-4 teeth in two sections and I it gave me a reading on the entire ring gear. Each tooth had a legible reading. BTW I used the original GM shims as removed. And although it appears the set up could’ve used an added pinion shim and the backlash was tight. No more GM differential noise.

Can’t really mess up gear marking compound. Works as it should.

I installed Ford Racing gears and the marking compound Ford included was old and dried out. This stuff is great it really holds the pattern well and doesn't smear. I may never use it all but it was worth it.

The compound worked perfectly! It was literally shipped to me in less than 24hours! I called My local Chvey dealer on Saturday they needed till Wednesday which is normal but amazon got it to me on Sunday at 2pm i couldn’t believe it!

Great for setting and checking gear contact patterns. There is enough in the tube to probably do 25 or more installs.