Manufacturer | YUKON GEAR |
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Brand | Yukon Gear |
Model | DuraGrip Limited Slip Differential Positraction GM 8.5" w/30 Spline |
Item Weight | 22.3 pounds |
Item model number | YDGGM8.5-3-30-1 |
Is Discontinued By Manufacturer | No |
Exterior | Machined |
Manufacturer Part Number | YDGGM8.5-3-30-1 |
OEM Part Number | YDGGM9.5331 |
Special Features | The GM 8.5" & 8.6" came in the following vehicles | GTO '70-'74 | Hummer H3 '06-'10 | Impala '71-'85 '94-'96 | Isuzu Ascender '03-'08 | Malibu '73-'83 | Nova '70-'79 | Oldsmobile Cutlass '70-'77 '85-'87 | Omega '73-'79Pontiac Bonneville '70-'86 | Rainier '04-'07 | Regal '73-'87 | Replacement Part Number: '559-010 | Riviera '75-'78 | S-10 Blazer '94 | S-10 Pickup '99-'04 | Saab 9-7X '05-'09 | Savana '96-'13 | Sierra 1500 '99-'17 | Sierra 2500 '11-'13 | Sierra 3500 '11-'13 | Silverado 1500 '99-'17, The Yukon DuraGrip Positraction (also known as a "posi") is a Limited slip differential (LSD), is a traction device that splits torque to both axles, enabling continuous traction around corners as well as a strait line. This Posi fits a GM 10 Bolt 8.5" & 8.6" Inches with 30 Spline Axles. Aftermarket Carrier Style: Clutch-type. Fits 2.73 Gear Ratio & Up., DIFFERENTIAL OIL: Use non-synthetic GL-5 gear oil and Yukon LSD (Limited Slip Differential) additive (ASIN B00J0G09JW, model OILADD) are recommended for durable performance and smooth operation. Synthetic oil is not recommended and can result in aggressive or noisy operation. This unit requires the use of carrier bearing & race part numbers LM102949 & LM102911 for the 8.5 in. housing (2.891 in. Race OD) or LM603049 & LM603012 for the GM 8.600 in. housing (3.062 in. Race OD)., The GM 8.5" and 8.6" came in the following vehicles | Bel Air '70-'75 | Blazer '77-'94 | Buick Apollo '73-'75 | Cadillac Escalade '99-'00 '02-'13 | Camaro '70-'81 | Canyon '04-'12 | Caprice '70-'96 | Catalina '70-'81 | Chevelle '73 | Chevy Avalanche '02-'06 '09-'13 | Chevy Monte Carlo '73-'78 | CK Pickup '77-'86 '88-'00 | Colorado '04-'13 | El Camino '71-'76 | Electra '71-'89 | Envoy '02-'09 | Express '96-'14 | Firebird '70-'81 | GMC CK Pickup '77-'86 '88-'00 | Grand Prix '71-'87, The GM 8.5" and 8.6" came in the following vehicles | G-Series '75-'95 | G-Series '78-'95 | Skylark '70-'72 '75-'79 | Sonoma '94-'04 | SSR '03-'06 | Suburban '77-'86 '92-'99 | Suburban '77-'99 | Tahoe '95-'17 | Trailblazer '02-'09 | Typhoon '92-'93 | Ventura '76-'77 | Yukon '00-'13 | Yukon Denali '01-'13 |
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Yukon Gear & Axle Dura Grip Limited Slip Differential Positraction, 30 Spline, 2.73-Up, Compatible with 8.5"/8.6" GM Axle, YDGGM8.5-3-30-1
Purchase options and add-ons
Brand | Yukon Gear |
Material | Steel |
Color | Silver |
About this item
- Forged 4320 Steel Internals
- Fully Rebuildable; 4-spring, clutch style positraction
- Clutch Style Positraction
- Assembled in the USA
Frequently bought together
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From the manufacturer
About Us
At Yukon Gear & Axle we make it our Mission to build quality parts that exceed expectation. It’s that simple! Our in-house engineering group utilizes state-of-the-art software to design product that’s then manufactured in partnership by some of the world’s foremost in OEM manufacturing. After rigorous and intense quality inspection, we’re proud to call it Yukon. Yukon Gear & Axle invites drivers and teams to connect with us and become a part of Team Yukon. Yukon products continue to prove themselves on the track, the street and the hills providing traction and performance in getting drivers to the podiums.
Product Description
Dura Grip Positraction from Yukon Gear and Axle provides aggressive traction to both wheels while maintaining a smooth ride. For a variety of on and off road applications.
Compatible with Differentials:
• GM 8.5" Front - 28 Spline
• GM 8.5" Front - 30 Spline
• GM 8.5" Rear - 28 Spline
• GM 8.5" Rear - 30 Spline
• GM 8.6" Rear, '09 & up
• GM 8.6" Rear, '99-'08
Product information
Technical Details
Additional Information
ASIN | B003O755NS |
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Customer Reviews |
4.7 out of 5 stars |
Best Sellers Rank | #13,545 in Automotive (See Top 100 in Automotive) #3 in Automotive Replacement Differential Assembly Kits |
Date First Available | May 27, 2010 |
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Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers like the quality, value, and ease of installation of the auto part. For example, they mention it works well, is well worth the investment, and is relatively easy to install. That said, opinions are mixed on durability and noise.
AI-generated from the text of customer reviews
Customers are satisfied with the quality of the auto part. They mention that it works well, runs well, and behaves nicely. Some say that the result was positive, with no more clunking and lateral movement in axels. Overall, most are happy with their purchase and recommend it to others.
"...The truck now drives better than before, no strange noises and it is holding up great through daily use and abuse...." Read more
"...wheel peel since I was already rebuilding the diff it works and it works well!" Read more
"Great posi, out of the box it looked great and had good looking parts. assembly went great...." Read more
"Works perfectly, both tires spin now. No whining or any noise coming from rear end so far. Used QP Shims for 8.5 GM to help set up." Read more
Customers like the value of the auto part. They say it's a great value for the money, well worth the investment, and provides quality at a decent price.
"...Found it listed for a great price with quick delivery and installed easily! Highly recommend this Yukon product, very impressed!" Read more
"...And better traction in snow conditions. It is well worth the investment." Read more
"Price was reasonable and item exactly as described." Read more
"Amazing product, AMAZING VALUE." Read more
Customers find the installation of the auto part relatively easy. They mention that the assembly went great, it's simple, and straightforward. Some say that the bolt-in installation saves time.
"...Found it listed for a great price with quick delivery and installed easily! Highly recommend this Yukon product, very impressed!" Read more
"...assembly went great. Gear pattern very close to stock carrier with stock shim thickness...." Read more
"...The setup and install was pretty easy but you will need access to a press to install the bearings...." Read more
"...And the Yukon friction modifier.I did my own install. It is simple but has to be right so study up if you're doing it yourself...." Read more
Customers like the fit of the auto part. They mention that it fits perfect on their Dodge Ram 2006, and works as advertised. Some say that the product is tight and grips the road well.
"...compared to the original one as you can see on the picture , fit perfectly on my 2008 Chevy Silverado 4x4 1500 5.3 feels like you can go true..." Read more
"...2Hi feels so much more sure footed and smooth...." Read more
"This part was right on the money perfect fit and description" Read more
"Perfect fit. The only set back there was no paperwork at all, no torque specs or installation instructions at all." Read more
Customers like the traction aid. They mention that it provides great traction, and is a nice option to add some traction. They also say that the suggested fluid tolerance for friction was spot on, and that it doesn't slip.
"...No noise and all the traction that you need! I Can drive around on the sand dunes and the beach in 2 wheel drive!..." Read more
"...breaking the new ring and pinion in but thus far the traction from this thing is great...." Read more
"...And better traction in snow conditions. It is well worth the investment." Read more
"...Got full traction to both wheels now. I did not....but you can adjust the clutch pack and spring rate on this unit as well...." Read more
Customers are satisfied with the smoothness of the auto part. They mention that it is quiet, smooth running, and drives well. Some say that it improves throttle steering. Overall, most are happy with the product's smoothness and performance.
"Really liked how my truck feels very tough and great handling beautiful performance easy installment nothing compared to the original one as you can..." Read more
"...2Hi feels so much more sure footed and smooth...." Read more
"...Not a bad thing and definitely improves throttle steering but it does change the handling and you should be aware of it...." Read more
"...Overall it drove well and the unit behaved nicely. I went to our local drag strip to run a no prep race...." Read more
Customers are mixed about the durability of the auto part. Some mention it's built well, high quality, and feels solid. However, others say that it broke on the starting line and the spider gears just blow apart.
"Really liked how my truck feels very tough and great handling beautiful performance easy installment nothing compared to the original one as you can..." Read more
"...Last weekend it did 2 hard launches. The 3rd hard launch the entire unit exploded...." Read more
"...truck now drives better than before, no strange noises and it is holding up great through daily use and abuse...." Read more
"...I just serviced the diff, and found no abnormal wear or materials...." Read more
Customers have mixed opinions about the noise of the auto part. Some mention that it works well but is noisy, while others say that it creaks and grinds on every tight.
"...The truck now drives better than before, no strange noises and it is holding up great through daily use and abuse...." Read more
"...During the first 50ish miles there was some slight shuddering that had me nervous. But it's cleared right up." Read more
"Works perfectly, both tires spin now. No whining or any noise coming from rear end so far. Used QP Shims for 8.5 GM to help set up." Read more
"...No noise and all the traction that you need! I Can drive around on the sand dunes and the beach in 2 wheel drive!..." Read more
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Top reviews from the United States
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Reviewed in the United States on October 12, 2023
My G80 took a dump. Took down to my brother in laws shop and we installed there. 2Hi feels so much more sure footed and smooth. Of course we haven't gotten any snow since, but driving through some greasy mud seemed to be no factor compared to prior.
Yukon could at least include some stickers! I was joking about them not being included, and fortunately my brother in law had some from installing Yukon posi's in customers cars. Got one for my toolbox that way, but it's a 'performance' brand and product and should always include at least a couple stickers.
AMAZON....IF YOU ARE GOING TO OFFER ONE DAY SHIPPING THEN DON'T SHOW UP AT 9PM THE NEXT DAY AND CALL IT "NEXT DAY SHIPPING". YOU ARE PROVIDING FALSE HOPE. WTF AM I GONNA DO WITH A PART THAT ARRIVES AT THE END OF THE DAY. 5PM WOULD BE ABOUT THE LASTEST I SHOULD SEE SOMETHING "NEXT DAY". IF FED EX AND UPS CAN DO IT, SO CAN YOU.
I didn't just randomly decide to upgrade...this was more a question of what to replace existing yet failing parts with.
My 2000 dodge 1500 4x4 was making noises I didn't like... we popped the rear pumpkin and discovered the issue after noticing HUGE driveline rotational play. My differential spiders were definitely on the way out fast...and apparently decided to wallow out the carrier at the same time.
Ok I need to get the best value for money spent....would prefer easy to install and while I can accept a higher noise level I would rather not most times. Yet if I could up the off road performance a bit that would be nice.
So their went the lockers... more expensive more noise....
The cost difference between a replacement carrier and spider assembly and a LSD wasn't that much. The cost of a lunchbox locker and carrier made that and the mini spool and carrier fall off the table as well as sound and on road issues.
So
I chose this... as my ring and pinion were just fine.... we set the lash at 0.0055" play and lubed up the rear end with 80-90 conventional as required by yukon and the LSD additive.
Over an open differential it's a big step up. Over a failing open differential it's a huge step up.
Now my DD/hunting/fishing rig is more capable and for roughly $60 more than replacing the entire dif with an open one I got added traction.
Thanks yukon.
Approx 1 week later
Still happy with it.... it makes a big difference in offroad and on road handling.
Yes it opens when not under load but if hard cornering with heavy throttle on a slippery surface (hard packed dirt road....sandy tarmac) expect both rear wheels to break loose and a drift or powerslide to start. Not a bad thing and definitely improves throttle steering but it does change the handling and you should be aware of it. I do realize I drive harder and more confidently than many people especially offroad... and that most folks are just happy to get there they don't need to have fun while getting there quickly....but I do.
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RECOMIENDO este producto
it's a shame Yukon company wouldn't include the Yukon posi-track additive that is required, some guys might cheap out on the additive and burn up the clutches, SHAME ON YOU YUKON.
I'll be installing it soon.