100% correct! It’s a trick done by unscrupulous people to hide noise caused by worn out systems (gears, bearings, etc). Good thing you intended on regearing!
Lol I dunno I use grease in my rearends and have never had an issue BUT I've only ever done it in my pick up and my semi I notice no difference in operation temp in my semi I've switched back and fourth half a dozen times
@Johndada517 the difference is that the grease won't leak out of a bad seal as quickly as oil. It seems like a nice combination of oil and grease would lube it well, but also ensure enough lubrication if you had a seal failure.
@@PeteRoberts-sy6ugThey did that with gear shifters in concentration camp to sabotage Germans. A truck supposedly could only make about 10 miles after that.
This is why i always ask if i can have the car inspected by the brand dealership before buying, if the seller refuses then its clear theyre hiding something.
@@clothokaftan I have a Chickanic friend, and bring her along. The looks on the faces when she pops out her toolbox and starts doing compression tests...
Often on the 80 series, you can have the swivel hub grease leak into the oil of the axle due to the seals degrading overtime, just make sure to rebuild the hubs
@@AlphanumericCharacters it's not grease. Just guessing obviously. That's 32% grease, 67% 75w140 gear oil. 1% misc. Random contaminates. Now churn that all up at a couple 10's of thousands rotations in a minute, you got yourself a Land Rover slushie. *ouch! I made a mess up!!! Land Cruiser! Negative on the Rover.
Another reason….. I’ve seen it many times in my career, people or shops don’t have the skill to re-seal the outer ball knuckles that will normally end up leaking gear oil profusely with age. So they will simply fill the outer knuckles with grease. Over time and after a few fills this will end up mixing with all the front axle gear oil and end up that sludge you pulled out.
Do you mean switch out all fluids that you can before you buy the car? I’m a noob when it comes to cars. What other fluids besides oil, antifreeze and windshield wiper fluid should you check?
@Wakebased more than likely you won't be able to switch fluids before you buy. But after you buy a used vehicle you should start with oil then do every other fluid you can possibly do. Research before you start anything and have fun.
@@Lost10mm. - Yea but you bought it, though! Then you find a rear end like this one! Just take to a reputable shop and have them inspect it. $150 inspection sure beats the crap out of having to put in a new set of diff gears or engine or...
@irishkelly654 not sure if there are going to remove the diff cover too check that on a inspection of a car that isn't yours. Personally most shops are not going to care enough to really check as much as a owner that knows vehicles. But having a very young looking face has taught me a lot, there's a lot of snake's out there so really appreciate the good ones maybe even give them a tip it's probably going to be thier first one. Cheers and good luck.
@@Lost10mm. - This is literally what these "inspections shops" do, though. They inspect vehicles. May not remove the diff cover but they reach in and take a sample (of all fluids), if it looks bad - up to you if you want them to check further - ie: remove the cover for further inspection, should you want to go that route, just as they check every thing else. They get paid to do it, they don't care who's car it is or if I end up buying it, they still get paid. Some times you lose the cost of the inspection if the vehicle is garbage but you win because you didn't get stuck with it. It helps to have some knowledge, to whittle out the obvious junk. Not sure where you are but where I'm from, in Canada, if you buy a vehicle from another province, you must have it inspected or they won't insure you. Those inspections are much more thorough. Cheers...
@jaygio are you asking because that's what you think? If so why would you think that? Is there something inherent to this knowledge that makes a dick a requirement? She explained the entire troubleshooting path that progressed logically. All that's required for that is and in depth knowledge and understanding of how cars and thier parts work and there's nothing about that thst gives men any advantage over women.
@@Benny23761I don't say that's the case but a lot of channels are not what they seem since there is a financial incentive and often there is a whole team behind them.
@@Shitty796 I love those Toyota banjo axles which like the Ford 9” diff has the easy to remove pumpkin so you can work on the differential gears on the bench.
@@doctormantistoboggan2339how is this a thirst trap? She was just making a video about a problem she faced while checking her car. I’m all for the satirical “women can’t drive” type of humor but mfs like you just make it a point to bash women just for being women 💀
Yup. Definitely quieting down noisy gears just like the sawdust trick. I must say I’m fully impressed you’re doing your own gear swap, it’s not a simple bolt on item. 👍🏼
@Kenny ya in high-school I looked at doing the gears myself and said fuck no. You gotta make sure everything is engaging correctly or it'll be noisy as hell
that's where you call the owner back and "thank him for the 4,500$ you found in the back while taking out the seats to have them cleaned"... Psychological warfare is a blast !
I told a realtor that the stuff in the attic needed to be gone for us to buy a house and she made a comment at closing about there ending up being rare baseball cards in there that made them a lot of money. 🙄 These stupid things just make the person sound petty and not very bright. I recall dozens of people that I've talked to about selling their homes and I've always shared that she was dishonest, not very observant, and created legal troubles between me and the seller that worked out in my favor... no one ever even met with her based on my comments. That was at least a 100k mistake in possible commisions over some petty sht she clearly made up 😂
My Dad is 86 and a retired mechanic. When he did his apprenticeship just after WWII there were so few spare parts around in Australia people would fill worn out gearboxes with banana skins.
100% the case. I had a customer come in not too long ago with the complaint that they had a whining noise in their rear end so they took it to a mom and pop shop to get it fixed and it came back. So when I popped the drain plug out, this dark brown muk came out smelling oddly like bananas. I think a mechanic just stuffed some of his lunch into the diff to shut it up!
Your dad raised you right. I really don’t know for sure if you were raised with a father in the home, but if so, congrats to him. I hope I can raise my own daughter to be this smart.
Awesome...just AWESOME! I thoroughly enjoy seeing a rebuild like this. After 20yrs in the same hub now its got everything new just like this car deserves. It's satisfying seeing nes sprockets and fresh oil all shiny
Or maybe they just didn't want it and don't give a damn? I know years ago I had an employee working with me that laughed and asked "Why would I vacuum a CAR!?!..LOL.Its a car......?" When I asked if he ever cleaned his van. He genuinely seemed like his mind was blown on such a "silly question".
He knew the hub seals were trash and that’s where the grease came from. I don’t think anyone purposely put that in there. She definitely needs to rebuild the hubs.
@@djnone8137 it’s more likely hub grease mixed with oil and if there was a friction based diff in that axle it didn’t help the consistency it isn’t that dissimilar to what happens when you mix oil and water in your motor
Yes we have people out there that specialize in hiding defects in a car’s appearance and also making them sound like a good car. Unfortunately my son found out about it recently. A young man who works hard to support his family was taken advantage of by one of these creeps.
Im not sure if it is recommended for vehicle differentials unless it is a mudder, but farmers replace gear oil with grease in equipment gear boxes to stop a leak from a bad bearing seal. For equipment it is recommended and a solid fix, also recommended for all terrain vehicles that will be in mud and water. Probably not recommended for high speed street Vehicles. Good catch!
@@zuwarkgaming so what is my comment in relation to the initial post about experience and talent.... It looks easy cause of daddy, not her. Dad is left out of this praise and its unfair
@@Emily-lk1mf Maybe.... Read a little. Like, the words immediately above your ignorance, possibly? I say, "don't see dad", so you say "don't see dad", and somehow that discredits the fact that I pointed it out first? You don't have daddy issues, just simply issues. Major issues. Wow, the simpletons that rush to say anything on here still shocks me.
As with any project vehicle, it’s about skill set or access to it. You obviously have the skills to fix this and much more. I am glad it’s in your hands.
I used to work for Pyle Bothers Differentials and a few times we saw this. We were told by one of the owners and they said the put powered graphite in there to quite it down like you said. The graphite turns it to grease.
Hopefully you got a good deal if he wanted to get sold fast! Kudos for rebuilding that rear end! I know how to do it but I'll be damned if I have to do it again or install a locker!
@@HughWoo So the leaking seal caused all if the gear oil to be displaced by the hub grease which leaked into the diff….and and somehow managed to be enough to fill up the whole diff with grease….from the hubs…the two little ol hubs… and the hubs still managed to have enough grease in them to keep from smoking them…. Interesting theory.
First thing I did when I bought my Tahoe was replace the diff fluid along with other important fluids. Great piece of mind on a 15 year old vehicle, no weird gear noises.
@BFT88 The CV joint on these are known as a birfield joint, and they reside in an enclosed housing. The birfield joint is packed with grease, and the housing is filled with grease as well. The inner axle shaft passes through a seal that is placed in the axle housing. When the seal goes bad, differential lube starts to work its way up to the housing and birfield joint, and soon you end up with what Toyota owners not so lovingly call birf soup Given enough time, the soup works its way back to the differential, and you end up with that nasty black mess. It’s not a hard job to change the seals and wipers just very dirty. I’ve had to do this multiple times over the years, and it sucks. This only applies to the solid front axle versions.
I know. Even the price of steel buildings have tripled in the last 15 yrs. Im sick of working outside year round in the northeast. Oh well, ill build one someday.
I think it’s pretty cool you started a project like this and are taking the correct measures to fix the problem, and posting it, and getting views, so keep it up!
Yea, likely to quieten things down back there. Back in the day, my mechanic friends talked about using banana peels in the diffs to shut them up. Not sure if they were joking or serious though.
Im impressed. I rebuilt my whole 9.25 rear end in my ram on my kitchen table. Replace all the ring and pinion bearings and races without any pulleys or presses.
I think you are spot on. I think you've made an excellent decision on the Fj80. And I think you are up to the task. Good luck and catch me on the trail in my 1982 fj40 w/spring-over, power steering lockers and 3:70 gears (18 miles/gal).
Well, first, how did the carrier bearings and the axel bearings look. Gears are gears....the scuffing is something, but the bearings are the key..... Could have been a blown seal and pump in the axel grease as mentioned. You're doing a gear set swap, completely R&R and start fresh. Good luck with your project!👍
@@wildestcowboy2668 Well I have to completely agree with you, because there's no door on the side of a ring and pinion gear front or rear axle for me to " get inside" and check it out........ Normally, I dis-assemble the axel, completely, clean up, inspect, check, measure and run numbers (if there's a tag), get all necessary parts for whatever the hell I am doing, and well, reassemble the axel and ring and pinion gear assembly, seal, lubricate and reinstall on the vehicle. 😁 I haven't the foggiest idea of mechanical things........ Just a Cowboy Redneck scratch building Hot Rod pickups and classic cars since the mid 1970's.... mostly Fords and a few Chevys and three Air Cooled VWs...... All gone now.... Still, the truth is, I know absolutely nothing about what I do..... Nothing. 😁
@@wildestcowboy2668 what, no reply? Quit telling people you don't know what they have or haven't done. Plus, you add nothing by calling someone out and not explaining a single thing. Do you think the light scuffing explains why grease is in there and not oil? If you're not adding anything useful, you're just whining, so whats it going to be?
Back when I was in the Army (1983-2009)we used to pack our rear diffs with GAA grease on our M-151 Jeeps back until the mid 80’s, it made them a LOT quieter but, there’s a trade off, lol. Those things howled at 50 MPH.
@@octaviofierro3923 having something else to drive don't make it any easier it just make sure that the cash is going to keep flowing when you still got a way to get to work
Khloe. I am Quite Sure the Previous Owner Used Grease to Quiet the Differential noise. Most People are Hack Mechanics and Scammers so they can sell their BIG PROBLEM TO SOMEONE ELSE.
You are exactly right ! Thought he was getting rid of it before it laid completely down. You go girl, I believe it will be fantastic when you are done going through it all !
Not sure if someone said this or if your jack stands are the ones from harbor freight but they did have recalls on them for failure... If they are HF I'd check on that!
Finally a woman who doesn’t sexualize herself and actually gets views from skills and knowledge they’ve learned instead of just looks from their parents that they were born with.
