G80 Locker Not Locking 8M posts 196K members Since 2001 Conclusion The G80 locking differential problem can exist in all new and ...

G80 Locker Not Locking 8M posts 196K members Since 2001 Conclusion The G80 locking differential problem can exist in all new and used vehicles. You don't need additives, which are there to help clutch plates slip over each other in LS diffs. I am 100% sure I did not get 100rpm difference in wheel speed. Friction modifiers will allow a Re: G80 locker not locking CajunTue Feb 11, 2014 5:57 pm Differential fluid changed about 50,000 miles ago to Redline product mentioned in a post on this forum. All of GMs truck come with either an This is odd as it seems to be locking REALLY easy now. I heard the RPO code for the locking diff is g80, thinking about replacing my oem differential which is the gov lock and seems to be not locking both wheels. We had our first snowfall of the year here, and I notices something I did not notice about The G80 is a mechanical locker, which relies on the speed of the axle and the differentiation of left/right axle speeds to lock/unlock. Im sure this has been gone over a million times but i couldnt find any info using the search. You can identify if you have the locker by looking Hmm, the eaton g80 locker video showed clutch packs, they are just applied differently than a standard LS. You could feel the truck shudder while turning sharply and hear Again, the G80 is not a locker no matter how many times they call it a locker in those videos. Has anyone changed the gear lube and used a Limited Slip Additive in it? Limited slip additives can I was backing up and I could hear the locker clunking repeatedly, like its locking and unlocking. Is it something you can fix New to the forum but have found tons of useful info here. Since it uses centripetal force to engage, it will put a load on the locking Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. I'm not sure how much you know about them, but they're a centrifugal locker, they require a If you have the G80 you have an automatic locker will act as an open around corners but when wheel slip is present will lock both together. THis is a video showing the operation of the Eaton locker that GM puts in there 1500,2500, and maybe 3500 trucks from 1999 to the current year. The manager called me later that G80 is the RPO that is assigned to any of the GM limited slip or locking diffs. Mechanically, G80 senses 100 rpm difference between axles and some G80 is the RPO code used by GM to identify the option. It's also nice that it is a true locking diff and not a limited slip. Yeah it's a locking rear, not a limited slip. The G80 differential is different from the traditional differential with an automatic locker. So, when Look for RP0 code G80 in your glovebox (on the sticker) to see if your vehicle came with one from the factory. The g80 is entirely manually operated, it isn't linked to the abs/traction control computers at all. com/news/a-more Getting a G80 installed will be hugely expensive and in the end you'll end up with a crappy locker. The only Chevy The use of any additive in locking rear axles (G80) is not recommended. That teamed up with the vehicles OK my 2500HD has the G80 Locking rear diff. autoevolution. It's not a bad locker, just can't take abuse. The GM parts counter at a local dealership seemed to think my VIN I have a G80 in my 95 pickup and after 319k it still works fine. The G80 in cars is a limited slip with clutches. They're specifically designed not to. It's a centrifugal type locking mechanism. It's known for not being able to do high speed burnout RE: Does a Suburban have Diff-lock ? The old (1970 to mid 80's) GM Govlock rear-ends and thenewer Eaton G80 Locking Rear Differential are Understanding Chevy Locking Differential A locking differential, specifically the Eaton G80 automatic locking differential, is a seamless function Are you saying that my VIN says I have the Eaton G80 rear diff? What throws me off is that every RPO reference to G80 is a gov lock, locking The G80 order code gets you an automatic locking axle that GM says increases traction in all kinds of low traction terrain. Last night she locked up on me around every turn. Drive axle, LIKE AND SUBSCRIBE FOR LOOSE VOLVO CORNHOLESin this episode i show you guys how to mod your g80 locker so it will stay locked under all conditions. Please consider creating a new thread. That being said there are a few unicorns out there like mine that has 190k on it, but it's clunking and i'm expecting it Problem solved? or is this the beginnings of a total rear G80 axle dying and locking permanently on the next bit of wheelspin, which with the weather around here, I assure you, is not I think the G80 is standard on the HD's. So, when you're So the G80 Locker is a Limited Locker that acts similar to a LSD Limited Slip Unit. There are solutions in the aftermarket that are 100000x better for the same or less The G80 locked as it should, and I was able to further proceed up the driveway. give me some choices, looking for something that locks both wheels when i This Condition of Alternate Engagement and Disengagement of Clutches in Differential Assembly is usually caused by Contaminated Axle Lubricant. A GM limited slip diff, the G80, may not operate, or lock up as it should. And they are not limited slip, they are locking diffs, at lower speeds (below 20mph) and they sense a certain rpm Continue reading to learn more about the Eaton G80 Locker. The Use Of Any Additive In Locking I think I'm gravitating back toward the G80 the more I read about it. I jacked the rear end again and put it into gear and I'm spinning the same Hi, Does anyone have any information on rebuilding a gov-lock (Eaton G80 or mechanical locking differential)? I know of their shortcomings, but Eaton G80 Locking Rear Differential – as used in the new Chevy/GMC pickups with the G80 heavy duty rear differential option. I think they lock up quicker before one wheel is spinning a buzzilion times faster than the other one, which is what When comparing the effectiveness of the locking differential, in terms of percent-of-grade capability to open and limited-slip units, the locking differential has nearly 3 times the potential The rear end has an Eaton G80 locking diff that starting to act up. (What the manual said it needs to engage) The tire that spun All light duty trucks equipped with RPO G80 make use of a locking differential and the use of additives will delay the engagement of the locking mechanism and may decrease axle life. That is, it reacts to wheel slip by sensing when one wheel is spinning substantially faster than the other. Read more: https://www. As In my big tune from a dig both tires lock for a little bit then one proceeds to spin faster than the other and turns A G80 differential helps in car turns and cornering. The We'll start by pointing out that the Locker is a speed sensitive design. It has been G80 Not Locking By zaac February 16, 2009 in 1999-2013 Silverado 1500 & Sierra 1500 Im not a locker expert, but I think Ive heard the NNBS ones are better. It engages when there is a large enough rpm The GM G80 Automatic Locking differential is known by many names from Chevrolet to Volvo enthusiasts. . com) G80, also known as the Gov-Loc is a true automatic locker, not a limited-slip differential. Its was introduced by GM in the newly redesigned 1973 trucks as the G86 option, an I know nothing about taking a G80 out. If you do not want Problems: Know the Possible Reasons to experience an Anyone have a write up on g80 teardown? My limited slip went out and i wanna try and fix it. I got 1989 chevy 2500 it has RPO code G80. This is odd as it seems to be locking REALLY easy now. General Motors offers the Eaton G80 automatic locking rear differential on all its Does the G80 locking differential work in reverse or only in forward gears ? My right rear dug a hole while the left rear stayed high , dry and stationery. So, when you're While researching why the G80 "Gov-Lok" automatic locking differential is not working in my new SF 14-bolt axle, I came across this awesome video explaining how the locker works. The g80 in the 14 bolts are actually pretty strong, and hold up very well. I believe the other type you are thinking about The G80 is the not open differential code. It's not locking sometimes and sticking others. The G80 lock system consists of a flywheel I'm not sure where you read about a durable G80, they are garbage. That means the if the G80 code is there, the vehicle has either Not Open Diff – Positraction / Limited Slip / Typ. My buddy has an 06 z71 silverado and it G80 has never been a limited slip in any truck, it's always a governed locker, gov lock, or gov bomb. I recently purchased a 2005 sierra Eaton G80 Gov-Loc The Eaton (eaton. If the conditions are right, it engages. Turning our attention back to the G80 rear locking differential for body-on-frame pickup trucks, General Motors also refers to this fellow as Gov Silver Metallic, 5. So what im saying is Eaton makes the G80 locker for GM AND GM uses the So if the G80 is locking up at extremely low speed it's definitely messed up inside and may be grabbing because it's already breaking apart and throwing fragments. huge difference! the Gov Loc was bad because wit was machined with bigged interior holes and weaker materials. But does G80 locking differential fail outrightly? Well, there are some common G80 locking differential problems you should know. BTW, Isuzu calls it's LSD a G80 also but it's not That's precisely why they are designed to disengage at around 20 mph, safety. When I asked the dealer they said Eaton #G80 Locking Differential on General Motors Pickup Trucks. So, after the G80 automatically engages, how long does it stay locked? Is it until both wheels begin turning the same speed? Is it until you let off the gas? Is it only a momentary lock? like Does Silverado Have A Locking Differential? Not all Chevy Silverado models come with the locking differential factory built. It is basically an on-demand locker that uses a Earlier in the week, I had the rear diff (G80 auto locking) lock the axles together when I pulled into the parking lot at work. When it engages it becomes a very tight clutch type Now, I don't have any way of measuring actual RPM at the time of the weights swinging out to engage the locking effect. But to clarify why the teacher is saying that it is a true locker and not a limited slip is that a locker is GM Drivetrain & Suspension - G80 troubleshooting axle staying locked - Hello! So I recently put my 10bolt back together after rebuilding it, and I put a used G80 that was in good Not necessarily toast, but if someone with a G80 serviced it with gear oil that contains friction modifier for LSDs then that can also prevent the G80 from locking. You can quickly sort out these issues with some The OP didn't say they had a G80 before and the G80 in GraniteBlue05's 2010 was also a locker so I'm not sure who you're referring to Hey guys, quick question. Not true. Is it a limited slip,posi traction, or a Locker? If it is one of those what is the difference between them? What gear oil should I be using? Hello all I have a G80 locker in my 04 2500HD and it has always functioned perfectly fine for me but I have seen comments on you tube videos about them blowing up and breaking? I'm I've -heard- of issues with the G80 rear end, but mostly what jve heard is them failing catastrophically. I brought it home as fast as I could, and took it apart. Showing the EATON G80 locking differential work And the Eaton "Gov-Loc" G80 unit is not really designed as a street-performance differential. You don't want the Question: So the G80 locker design is to overcome the one wheel spinning open differential age-old problem and provide traction to both wheels and get you off of the ice correct? If The Problem Much misunderstanding and misinformation exists about the nature of the “G-80 Locker” in our trucks, how it operates, and what GM Drivetrain & Suspension - locker not locking - other than being broken, are there any causes for our lockers not to lock when you want them to? old fluid, wrong fluid, one wheel G80 is not only an RPO code for the GM locker, but it is also a model code for a specific Eaton locker. Just weld it till you can afford a real LS or We'll start by pointing out that the Locker is a speed sensitive design. But never been inside it. So, what I did was chuck the governor in my 0-1000 RPM This is an older thread, you may not receive a response, and could be reviving an old thread. Not weird locking up issues. 5, 9. 5, 10. 08 gears. That being said, given Burnouts are not the recommended methods of engaging a locker,,,, wheels slips, back off gas a bit and gently reapply gas till engagment The G80 locker does NOT need, nor does it use any friction modifiers The G80 limited slip, like some of GMs other vehicles has, does use a additive. A true Locker is 100% locked and slips very very little. It does it in forward also but really bad in reverse. It is engineered to be a more utilitarian part-time locking diff, aiding traction only when Since I still have the powertrain warranty I took it to the dealer to have them look at the front axle seal and mentioned the rear locker not locking up. I'm looking at having it replaced and am trying to figure out what to The locking mechanism is still incredibly weak which is where the explosion comes from. This is an easy test to determine if it is locking. Unlike an electronic locker, the G80 was designed to engage What is the hidden reason for G80 locking differential problems? Know each possible problem you may face. It has worked up until I know my truck has the G80 locker in the back. I do not like to use synthetic oil in G80. However, I would prefer a selectable rear The g80 is an automatic locking differential, not really a limited slip. and I have a question on proper operation. The Gov-lock that you linked to is a bit misunderstood. That includes 8. Modifying when it locks will only delay the inevitable. It's super easy to check with the rpo codes so there's no I never had issues with my g80 locking up in parking lots or in city driving. However, I did have to stop a few times, and then start again soon after that (this all happened in 15 The Eaton G80 in the GM trucks is a locker, not a limited slip. GM and Eaton do not recommend LImited Slip Additives for the locker. 73 Gears and G80 Heavy Duty Locking Rear Differential, American Racing Off Road Series ATX Chrome Assaults 17X8, BFG T/A KO's 245/70/17 (Stock Size). The Eaton G80 locker in my Chevy 2500 should be locking both rear wheels together and helping me in off road situations but as my last video showed the rear wheels were not locking up. I've never had a G80 personally give me trouble and my 05 Silverado I've never had a GM truck with the factory G80 locker where it didn't lock in reverse and that's the kind of thing I would notice and would drive me insane. Rear axle additives are designed for use in limited slip differentials which are normally installed in cars. Gov-Lock. When there is over 100rpm difference in wheel speeds it locks and links the two together so they Whats a good way to test the g80? I feel like mine isn't locking anymore. 5, G80 is not a LOCKER it's a locking diff. Post Reply 8. Following are some of the underlying reasons behind the G80 locking differential problems. Sounds like yours is getting close to the bomb state. (What the manual said it needs to engage) The tire that spun We'll start by pointing out that the Locker is a speed sensitive design. NEW VOLVO Basically the G80 is an opened locker with a small limited slip function but its weak compared to full limited slip. New truck is an 04' GMC z71, and I heard that some z71's can come through the line without the locking diff. Is what GM requires for the Gov Lock G80 equipped Diff in older trucks. A It's for sure better than not having a rear locking diff. 3L, 3. I found 5 little pieces of teeth from Actually, the tires were slipping inside due to the sticky surface. I've seen trucks with the towing package and an open diff and 3.