Upgrade Your GM 12-Bolt Truck Differential with 🔧 USA Standard Gear (ZG GM12T-342) Ring & Pinion Gear Set Review

didn't fit my econoline 06. the hole pattern on the gear was smaller than the pattern on the carrier. I'm not sure if I received wrong parts or differences in holders. 8.8. The retainer is a Yukon Duragrip that has been tested to fit the factory sprocket. Someone returned this box with an 8.8irs 4:10 gear set for a Ford Mustang. Amazon took care of it and a replacement is on the way.

China scrap. It had perfect markings, it was dead quiet and after 2000 miles it was complete rubbish. Started at 0.008 with a patch of play, and when it was making a lot of noise out of the blue after about 30 miles round trip to work, it basically opened up to 0.0022 and the gearbox just fell apart for no reason. This is of course from the Amazon return window. Talking about just not paying my Amazon bill makes me feel cheated. Transmission tuning has become a part of my life and nobody has…

My kit seemed to love socks for the coast and socks for the ride! not bad I would say. Both are true even though I did about 100 break-in miles on my set. They've been pretty quiet so far, can't tell if my rear end has been affected by OE. The backlash is recommended between 3-6, I used 4 in my set. Even though my medium dried up a bit, I still got 4 to 7 on the highest setting. I decided to let them go like this and they have been quiet so far. I would definitely recommend it to anyone who…

Overall I'm happy with it, but not without aches and pains. The gear had an unfinished notch under the spline towards the head. Expansion sleeve and seals do not fit. We're talking thousandths of an inch, but you could still see and feel the unfinished lip. So after some grinding and polishing, the bushing and spacers will fit. After four days of adjustment, test drives and good traces of paste, the transmission still whistles, mostly when decelerating, especially in the 40 km/h range…

Update (7.26.19): They have finally been installed. I have had no issues, they are quiet, leak as expected and to confirm for those who are unsure, the kit I received WAS ABS COMPATIBLE. However, I would like to warn you that these may not be all of them as the manufacturer themselves have stated that they are not ABS compatible. So be aware. I bought a ZG GM8.5-342 (3.42 kit) for my 1996 Impala SS. It wasn't clear to me if the transmission had an ABS troubleshooter, the stock US transmission…

Well I worked at Ford for 22 years as an ase. My old Ford Ranger has done 331,000 miles and the ring and gear failed. I have previously installed 3.73 USA Gear for a customer and had no problems other than spending 2 days repairing paint wear. I had to grind my washers. I ordered 4:56 for a bit more torque for my 4 cylinder manual transmission to get the boat off the ramps. All installed well but I had to preheat the ring to expand it a bit to get on the spool. The problem I have is that in…

Good. where to start I installed them on my 2009 Chevy Silverado. The toothing depth was set correctly and the wear pattern was perfect. Rear wheel clearance and preload are also correct. Filled up with oil and drove off. I didn't drive a mile and turned around because of the loud noise of the gears. I can deal with some noise but they were loud. Took everything apart thinking I had the wrong load on the gearbox mount. Everything looked fine. I knocked out the clips and bought new transmission…

These gears look good quality and the wear pattern after adjustment looks the best I have ever seen. I have an 8875 GM 12 bolt truck on the back of my '67 C10. All 3 of my C10, 67, 68, 69 2WD trucks had 3.08 gears installed from the factory. I think because my '67 and '68 only had a three-speed automatic transmission, it was better on the freeway. I have 69 years 3 manual transmission. Since I installed a 383 string small block and a 3000 rpm stall converter in the TH400, I figured that due to…