USA Standard Gear (ZG D30R-488R) Replacement Ring & Pinion Gear Set for Dana 30 Reverse Rotation Differential
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Availability:
Only 1 left in stock, order soon!
Arrives
Jul 16 – Jul 18
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Style: Dana 30 Reverse Rotation 4.88 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 4.88 axle ratio
Description
Get it done right, the first time with drivetrain parts from USA Standard Gear. From Ring and Pinions to Axles, Installation Kits, Bearings, Seals, and lockers, we have everything you need
Manufacturer: USA Standard Gear
Brand: USA Standard Gear
Model: ZGD30R-488R
Item Weight: 8.39 pounds
Product Dimensions: 16 x 12 x 6 inches
Item model number: ZG D30R-488R
Exterior: Machined
Manufacturer Part Number: ZG D30R-488R
OEM Part Number: ZG D30R-488R
Date First Available: February 13, 2012
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Jul 16 – Jul 18
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 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: Chrysler 9.25" 3.55 Ratio
have used USA Standard Gear ring/pinion sets for years now. always a good value for daily driver level use. My first set ordered from amazon arrived beat to hell with broken teeth etc. easily got a replacement that arrived in perfect condition. Glad it was 'sold and shipped by Amazon' item not a secondary seller on Amazon. Anyway, got the gear set installed. works great!
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Reviewed in the United States on December 26, 2024 by REEK
Style: GM 8.5" 3.73 Ratio
Very good quality and fit perfectly
Reviewed in the United States on March 23, 2025 by RICHARD
Style: GM 8.5" 3.73 Ratio
Installed and setup well, we will see if it holds up
Reviewed in the United States on March 14, 2025 by timmy fields
Style: GM 8.5" 3.73 Ratio
I like that it has everything that I needed what's going to drop Perfect items thank you I'll definitely buy it again
Reviewed in the United States on November 9, 2024 by Saul Ruiz
Style: Jeep JK Dana 30 Reverse Rotation 4.88 Ratio
Apparently, you cannot say you received the wrong product in the product review or mention that receiving the wrong product has led to missing a deadline to have the vehicle fixed. So, I will give a product review per guidelines. The product was manufactured very poorly. In fact, so poorly that the fins on the on the ring gear are pointed in the wrong direction. The center of the ring gear was also measured carelessly as the center is too big. The pinion had similar manufacturing defects and does not properly fit a Dana 30 JK. The shop manufacturing these gears needs much better-quality control, as the product is so far from acceptable tolerances it gives the appearance of being the wrong product, but of course I can't talk about that, so I will just have to assume this is all the result of poor craftsmanship.
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Reviewed in the United States on March 19, 2024 by Amazon Customer Amazon Customer
Style: GM 8.5" 3.73 Ratio
2000 silverado 1500. I ran the differential out of oil. The pinion gear and ring gear were destroyed. I took it apart and put in new pinion and carrier bearings along with the new ring and pinion gears. I used a new crush sleeve on the pinion. I used the 2 oem shims on the differential. The lash came out at 10 thousands. The factory spec is 5-9 thousands. The gear pattern is perfect.Right in the middle.Without any pinion depth adjustment. Update. 2-15-25 everything working well without any noise...
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Reviewed in the United States on May 2, 2023 by Thomas Atack
Style: GM 8.5" 3.73 Ratio
Perfect replacement for the gears that were damaged when I threw a bearing. For the most part, it was easy to install and replace the old chewed up gears. They are heavy and well made! Quality seems to be a priority. I bought the bearing and shim set to go with the gears, now the ride is quiet and smooth.
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Reviewed in the United States on January 25, 2024 by Ken Boothe