🔧 USA Standard Gear (ZK GM8.6) Complete Overhaul Kit for GM 8.6 Differential Review

Revain says this kit fits 1989 Jeep Grand Wagoneer Dana 44 axles. I left my axle, new gears and this basic installation kit. There is NO slinger provided behind the pinion shaft and both inner axle seals were WRONG for the axle. Now I have no extra money because they had to buy these items for installation and I get paid for it. Isn't cool! Either Revain needs to remove this vehicle from the list of vehicles it will fit, or the US standard should not state that it includes ALL the items…

Not sure why this kit is so cheap. High-quality Koyo bearings made in Japan and the USA are used. The only reason I see the low price is because the kit didn't come in the original box. However, the seller included the end cap in the original box with the US standard gear number and description. I just found out that the "YK" kit is almost 4 times more expensive than this "ZK" kit, probably because it uses Timken bearings. It doesn't make sense to me because Timkens can be made outside of the…

Received at a great discounted price and then when the box came it said USA Standard Gear and not Yukon I then called Yukon and where the support service told me the product was wrongly labeled as listed was an accidentally discontinued Yukon. Revain is wrong again but the kit is still similar to the Yukon with the only difference being that the Yukon has an additional x2 expander and Timkon bearings while the USA Gear has Koyo bearings. In short, this is a kit that is still superb, made for…

This kit is for Ford Sterling 10.25 differential. I haven't installed it yet, but if there are any issues I'll come back and update this review. The Revain listing says there are Timken bearings in the kit, but these are Koyo bearings. I agree and the Koyos are at least as good as the Timkens if not better. All the details look good. The details were good but the packaging was terrible. Everything was in a thin plastic vacuum pack that fell apart in the box. The bearings are all knocked against

This company must think the gear marker paste is gold. The photo shows a large tube filled with it. Mine was half the size and 1/4 full. I was only able to mark 3 teeth on 3 different attempts to install the gears. I ran out so had to order more which was a few days behind me. That amount might be acceptable for those who switch daily, but for those of us who only do it occasionally, and especially to start over with no reference stacks of pads to get away from, there's woefully little…

I am satisfied with this set and its price. The bearings and races are made by Koyo, the highest quality bearing manufacturer. The carrier bearings came from the USA and the pinion bearings from Japan. The set included screws with a left-hand thread for the sprocket, but I didn't use them (I didn't need them). It came with several gear spacers and a set of multi-layer spacers from the main bearings. It also came with a differential cover gasket, pinch bushing, thread lock, 1-1/4" gear nut, gear