USA Standard Gear (ZG F9-411) Ring & Pinion Gear Set for Ford 9 Differential
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This item is eligible for return within 30 days of receipt
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Availability:
Only 3 left in stock, order soon!
Arrives
Jul 24 – Jul 26
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Style: Ford 9" 4.11 Ratio
Features
- USA Standard ring and pinion sets are the right choice to add confidence to your install
- USA Standard Gear offers a full line of ring and pinion sets for a variety of common and hard to find applications
- USA standard gear offers a standard one year warranty against defects on their ring and pinion sets
- This product is used in a 4.11 axle ratio
Description
Ring and Pinion Gear Sets from USA Standard offer enhanced strength while maintaining affordability, making them ideal for your next repair, rebuild or regear project.
Manufacturer: USA Standard Gear
Brand: USA Standard Gear
Item Weight: 18.5 pounds
Product Dimensions: 16 x 12 x 6 inches
Item model number: ZG F9-411
Manufacturer Part Number: ZG F9-411
OEM Part Number: ZG F9-411
Date First Available: February 13, 2012
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Jul 24 – Jul 26
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Style: GM 8.5" 3.73 Ratio
Well. Where do I start. I installed these on my 2009 Chevy Silverado. Had pinion depth set correctly and had a perfect wear pattern. Back lash and preload also correct. Filled with oil and went on a drive. Didn't even make it a mile and turned around due to loud gear noise. I can deal with a little noise but these were loud. Took everything back apart thinking I have pinion bearing load incorrect. Everything looked good. Knocked out races and purchased new pinion bearings thinking this could be my issue. Crushed the sleeve and set everything up. Checked my wear pattern again after setting back lash and it was set good. Went for a drive and still just as loud. At this point I think I installed it wrong. Called my buddy (GM certified tech) and he helped me take it back apart. He looked at all bearings and wear pattern and confirmed it looked good. He took pinion back off and measured old shims to new shims I installed to confirm preload. He then came to recommendation that I use a OE pinion bearing vs the Toyo I just installed. We picked up a bearing and had to change pinion shim to accommodate different bearing (thank goodness for cheap harbor freight press). Set everything up and took for a drive. Still loud!! I drove truck for "break in" and pulled over to let cool down thinking this will eliminate the noise. When I pulled over I checked my temparure of differential and it was at 128 F on a 100 degree day. Once it cooled off I drove and still noisy. Got home and checked diff temp. Reading 125 F. Not bad at all. Called Yukon Gear who makes USA standard gear and told them my problem. He transferred me to their technical person and he told me the USA gears have a known problem for being noisy on 07 - 13 Silverados??? He said the 2009 and up was worse due to difference in pinion bearing size? He told me to get with supplier for return. I ordered a set of GM 3.73 gears (expensive!!!!) And called Amazon. Amazon was super helpful and accepted the return request. Once I got my GM gears, I installed them and boxed these back up to Amazon. The new GM gears make zero noise. Same sound my factory 3.23 gears made. Nothing! Funny thing to I was so tired of working on the rear end I wasn't exactly thrilled on my back lash setting on the GM gears (still within spec) and they made no noise compared to "right on the money" I had for USA gears. I will say this though. If I had a car I didn't drive often at all or an off-road rig, I'd use USA standard gears. Although they were super loud they didn't run hot. For a daily driver like my case. I wouldn't recommend these. I don't know. Maybe I didn't do enough homework and these gears aren't meant for my application. Don't know and don't care lol. It's done now. Figured I'd share my experience.
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Reviewed in the United States on July 25, 2018 by Amazon Customer
Style: GM 12-Bolt Truck 3.73 Ratio
These gears appear to be good quality and the wear pattern looks the best I've ever seen after adjustment. I have a 12 bolt 8.875 GM truck rear in my '67 C10. All 3 of my C10's, '67, '68, '69 2wd trucks had 3.08 factory installed gears. I guess because of only a 3 speed auto trans in my '67 and '68, it was better on the highway. My '69 is a 3 speed manual. I decided that since I built a 383 stroker small block and installed a 3000 rpm stall converter in the TH400, due to the cam profile, I would replace the 3.08 geared, one wheel peel with a 3.73 gear and a Spartan "lunch box" locker. I'm just about to fire this thing up in a week or two. Just waiting on the machine shop to do the final piston fit honing and it ready to assemble, stab it in, hook everything up, start it up, and hold onto my hat. But I digress. Sorry, lost track. Anyhow, changing the gears from 3.08 to 3.73 I obviously had to re-shim my carrier to move it to the left. The factory shims were just about equal from one side to the other. Left being a .230 and right being a .243 thickness. I had to bring my left side to .445 and the right only has .024 gap in order to get my .006-.010 backlash needed for a good pattern. I even had to shim my pinion an additional .030 just to get it right. It's not quite a tight fit as factory, but I don't have a housing spreader and the 3 very thin .008 shims were giving a fit without trying to fold over on me. I don't think .004" is going to give me any trouble. Especially with the Moser girdled diff cover I'm using. Okay, here's the issue I ran into. Being that I needed to shift the carrier over almost a quarter inch, the right side of the carrier was hitting the area just outside and to the front of the bore for the carrier bearing. So, I removed the carrier and used a dremel tool to slightly grind the carrier housing on the four 'corners' where the bearing is pressed on. I took off about .100" on each edge and it then fit like a glove. I got my backlash to .008". Installed the yoke with a new crush sleeve and torqued the pinion nut to 11 in.lbs. Re-installed my carrier and torqued the caps to 60 ft.lbs. and installed the diff girdle cover. Hint to the next guy that decides to rebuild a differential. Purchase some cheap new pinion bearings in addition to the bearings that you are going to install. Grind the inner race of the cheap bearings so they slide over the pinion without being pressed on. This will save a bunch of time and frustration when adjusting or shimming the pinion depth. When it's all clocked in, just remove the dummy bearings and press the final good bearings onto the pinion. Oh, btw, the spartan locker is a pain in the butt to install with the diff housing in the vehicle. If possible, remove it and set it on a bench or jack stands with the yoke facing the floor. It's much easier to articulate the c-clips this way as long as you hold your tongue right. Good luck
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Reviewed in the United States on August 3, 2019 by Rascal The Rat Rascal The Rat
Style: GM 8.5" 3.73 Ratio
Chinese garbage. Had perfect pattern on it was totally quiet and with in 2000 miles went to total garbage. Started with .008 with in speck for backlash and when started making lots of noise out of the blue after about 30 miles back and forth to work basically it opened up to .0022 and Gear was just coming apart for no reason at all. Of course it’s out of the return window from amazon. Debating just not paying the bill to amazon on this one I feel scammed. Set up gears as part of my living and never had one do this to me ever. China strikes again with an inferior product. Stay away of your smart.
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Reviewed in the United States on July 9, 2018 by lt1z350
Style: Ford 7.5" 4.56 Ratio
Well I’ve worked at Ford as a Ase Master for 22 years. My Old ford ranger has 331,000mi on it and the ring and pinion failed. I previously installed a 3.73 USA Gear for a customer and had no issues except spent 2 days trying get paint wear correct. Had to grind my own shims. I ordered the 4:56 for a little more torque for my 4cyl Manual Trans to pull the boat out on the ramps. Everything installed fine but had to preheat the ring to expand slightly to get onto spool. The problem I ran into is this particular set (4:56) the teeth cover over half the hole. No correctly notched cross pin exists for this ring on a factory carrier. I did make it work by tophatting the gear teeth by the hole and also removing 1/8 in from the original notched crosspin. Removing too much from either the ring or cross pin will result in failure. Truck drives wonderful with th 4cyl manual trans and 4:56. Truck runs about 75 at 3000rpms. But at 65 I am at 2000rpm in overdrive. Would I do again? Likely not too much play and adjusting this set along with modifications. Also I still worry my C clips will slip out since shaving pin 1/16. It is unlikely, but as a Ford Tech I wouldn’t do this to a customers car.
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Reviewed in the United States on February 20, 2019 by Bdamon