12 Bolt Rear End Noise Diagnosis and Repair
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- čas přidán 10. 09. 2020
- This 1972 Chevy Nova with LS power has a really bad noise coming from its 12 bolt rear end. In this episode I take you through the process of diagnosing and repairing this noise. I also cover backlash, pinion bearing preload, bearing installation, setting pinion depth, reading gear tooth patterns, installing new gears, and other tips and tricks to make sure that the differential in your vehicle stays quiet and strong.
I hope you find this information useful!
#ETCGVideo
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The best place for answers to your automotive questions: www.ericthecarguy.com
Check out the ETCG Blog for the latest info: www.ericthecarguy.com/blog
Check out my ETCG1 channel: czcams.com/users/ETCG1?su...
Thanks for watching!
Links
Sorry I don’t have direct links to the parts used in the video as they were brought to me along with the car. These are the places where I get most of my differential parts and accessories.
Summit Racing: www.summitracing.com
Randy’s Worldwide: www.randysworldwide.com
Info on Identifying 12 Bolt Differentials: www.onedirt.com/tech/drivetra...
Diagnosing Ring and Pinion Issues: www.onallcylinders.com/2014/0...
Tools
Pinion Depth Measuring Tool: www.raceplumbing.net/TD-Machi...
Dial Indicator Set (Checking Backlash): www.jbtoolsales.com/central-t...
Bleepin Jeep Pinion Tool: store.bleepinjeep.com/product...
Astro Pneumatic Bushing/Seal Driver Kit: www.jbtoolsales.com/astro-pne...
Shim Installation Tool: www.summitracing.com/parts/yg...
Milwaukee Angle Die Grinder: milwaukeetool.com/Products/Po...
Inch Pound Torque Wrench: www.jbtoolsales.com/precision...
CRC Brake Cleaner (5 Gallon): www.amazon.com/gp/product/B00...
Brake Cleaner Sprayer: www.jbtoolsales.com/titan-too...
CRC Rags: Sorry, I believe these are discontinued
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Stay Dirty
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Due to factors beyond the control of EricTheCarGuy, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. EricTheCarGuy assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. EricTheCarGuy recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of EricTheCarGuy, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not EricTheCarGuy®. - Auta a dopravní prostředky
I've really missed a proper nuts-and-bolts repair video - and this is one of the best. How many people would mount an under-carriage camera to seal the deal? This is why we come back time and time again. Still the best quality; still the best on CZcams. Long live ETCG!
You're too kind. Thank you very much for your comments and viewership.
@@ericthecarguy You're very welcome as always.
@@ericthecarguy I prefer this "vlogger" format over the old with Brian, even if it means more work for you.
EricTheCarGuy give me a call at 3BG Supply Co(we’re connected via LinkedIn)- I’ll help ya with all the automotive and industrial interchanges- I didn’t see the part numbers or the preload fitments but most are C3(electric motor grade for thermal expansion) however standard C0 is quite common for Diffs etc.
I have to agree, i really miss " the car " in EricTheCarGuy.
Love it when Eric says "Try this at home kids--be a gearhead".
You should market that on a shirt?
Everything about those era Nova's are so beautiful, from the body lines to the front grill/headlights 😍😍
I agree 👍
I am really amazed how many of these old cars are still on the road. They are going on 50 years. When I was a teen in the 1970's, there weren't many 50 year old cars on the road then. A lot of the old cars then were from the 1950's.
I believe that Eric and this Nova are the same age.
Amen brother!
My old man owned several ...sweet little cars 😌
Better with the ls thou
Man, is there any greater moments of joy in a mechanic's life than putting a ton of time & effort into a repair, and going on that test drive where it works flawlessly?
This was a fantastic video Eric, I appreciate the time and work you put in to creating and uploading such top quality videos.
Amen to that, and thank you for the comment on my work. I really appreciate it.
You forgot to mention doing it in a classic American made GM muscle car😄
I didn't realize how long this video was until it was over. I love this channel, thank you Eric.
I take that as one of the best comments. Thank you!
Look at you with your gopro mounted camera underneath on a test drive! Bad ass Eric, love it
Thanks Paul! I put a GoPro mount onto a speaker magnet. 😉 It's very handy for stuff like that.
Another differential win - and fixing a few "bad ideas" from previous hands that were in it. 👍 From Texas.
Good job Eric! Now you really are a rear diff expert. :0 Big smile means success.
Those 60s/70s cars are what I grew up with. They are true works of art. Thanks.
Damn man, really nice job. My smile factor was 11 as soon as I saw the '72 Nova. I used to have one. Wish I never sold that car. Your expertise really shows in this video. Wish you were local! LOL Keep up the great work.
We all have those ones that got away. Mine was a '72 El Camino. Selling that thing goes down in history as one of the dumbest things I ever did. I bought it off a friend in Phoenix for $500 in '00! Should've kept it - that was a gift! Instead I bought an '07 Silverado off the showroom floor. I've had nothing but trouble with that thing since day one! Live and learn ... 😔
Feeling with you. Had a ‘74 Nova. Biggest mistake in life was selling it about 6 years ago. Still miss it today :(
I have an 03 Tahoe Z71 with a failing differential that I'm fixing to dissect in my driveway on a shoestring budget. I'm thoroughly terrified. I cannot thank you enough for all of the info you cram into your videos. I have watched probably close to 75+ videos on how to troubleshoot / tear down/ rebuild differentials and yours have helped me the most in trying to wrap my head around what I'm fixing to do. Thank you EricTheCarGuy I don't know if I could do this without you.
Probably one of your best videos in years! Back to the nuts and bolts! Love it. Keep em coming please.
I was taught to expect the tooth pattern on the ring gear to always be slightly off centre - because there is some lash, the drive side should be off to one side of centre and the coast to the other side. And your pinion teeth don't look to be sliding off the top of the ring teeth or hitting in the bottom between the teeth. What you have there looks about textbook. :-)
Final drives were always the bane of my existence - I never did enough of them to get comfortable with the procedure - so it's nice to watch someone else doing the messy stuff and I just get to enjoy spectating. Thanks, Eric. Cheers!
Glad you mentioned the break in on the gears. That’s key as you know to gear longevity. Your really a fantastically thorough mechanic. Folks are blessed to have you doing the fixes.
Love seeing the integra still there. Was my first car and I learned how to fix alot of things saving me alot of money because of this channell. Thanks eric
Nice video, loved the camera fall and the evil laugh when you did the test drive at the end.
When I was in grade school, a buddies dad was a diesel mechanic. He had tons of those bearings in the scrap pile. They are excellent wrist rocket ammunition!
Thanks for showing this. I love how vehicles are put together. Don't know if I'd ever have the confidence to do this myself.
Awesome job Eric!!!! :) That smile factor that you had on your face at the end on the test drive says it all!!! :)
Love this video Eric. That “little kid” smile and giggle when you mashed the go pedal at the end was classic. Had me giddy!
It's a pleasure to watch a master at his craft, someone who takes pride in his work opposed to someone that would just slap the gears in and send you back down the road. The little thing add up & go a long way in the end.
Jesus what a damn job you have patience and dedication Eric.
I love 68-72 Novas!
Hope we see it again in the future.
Glad you got the axle right first time around :-)
The year 72, my first car was a 72. And that green is color is so badass. What a beautiful car.
Love the big grin at the end. Nothing better than a difficult job working out correctly. Good job as always Eric!
I have to go through the rear end on my 70 chevelle and you've given me possibly the best instructional video! I usually watch a bunch of BS videos from BS "mechanics" and then I know for sure what not to do. Then I watch yours and, no surprise, you're doing it right.
My first car was a Nova. Swapped a built 350 in stall converter, 373 gears. Plenty snappy. Was still like Rodney Dangerfield car in the 80's. Still love them and now it seems the rest of the World does also..
ive been subscribed for a long time and just noticed how many viewers you have now. im glad you got a ton. you make great videos and knowledge.
Great to see you get a win. Very informative video. Thanks for making it.
Thank you!
It is a very beautiful sound of engine, I chills just to hear this real melody in my ears !!!
Give me a Ford 9" rear-end any day. *SO* much easier to deal with. I upgraded my '68 Galaxie's rear end to a 3.70:1 limited-slip, and it was about a 30-minute job, tops. Un-bolt the "pumpkin", bolt the new one in, and fill the whole mess with oil. Didn't have to do any pre-load crap, because the manufacturer of the "pumpkin" did all that for me.
The 9" rear-end and the Autolite 4100 carburetor are two things that Ford got *absolutely right* in the '60s and '70s. They screwed up plenty, but those are two of the best things ever made for old cars.
smile factor 11 - good to have a win! cheers for the share.
Eric you're a PhD in differentials now, really impressive work, like you said "Nailed It"😉
I haven't done any differentials as yet, but I'm pretty sure whenever I've to fix one, I will definitely be watching these videos again & again (every step of the way) for perfect results😉
Thanks for sharing Eric & Stay Safe❤
CZcams audience has missed you a lot😉
Thank you!
Meaning no disrespect I would love to see this car back in the shop again!
That thing is BEAUTIFUL! Wish I got more of those year cars in here - my stress level would go WAY down, lol! Nice work, Eric! 👍🍻
Thank you!
If I had my dealer do this, i'd be over three large in labor hours, it's good to have friends.
300 or 3 grand?
Great video Eric, truly enjoyed watching you and love your soothing voice!!
Love the 60's and 70's Novas, Camaros and Malibus.
Thoroughly enjoying your vids. Great attention to detail.
Thanks Eric for showing this video. It’s nice for me because I’m soon going to attempt to change my gears and a bearing and race set on my Dana 44 bronco axle. Just one of many videos and blogs I’ll look at and read.
Good to see good OG techs 👌🏼
The camera takes a hit and all I hear is "Down goes Frazier!" Great job ETCG1.
Like always, AWESOME video ETCG
🤘😎🤘
I recently acquired an experience-based Faux Expert Leisure rating on differential service for our ‘71 Caprice (hubby drive it in HS, but I’m doing most of the rebuild 🤓
I ordered the BleepinJeep pinion yoke tool about five minutes before watching this so that's good new. Good video. I still dread this job though.
Absolutely loved this video. Always great content. Thank you Sir!
love the predictive complaint replies interspersed in the dialogue.
Hey man Kevin here from Australia.
Awesome video thankyou for sharing.
Stay safe and stay well.
✌ Peace. 🌻
Such an nice sound i love it, i dont know how powerful it is but sounds great.
Outstanding video Eric!
Great video Eric !
What a satisfying repair! Smooth like butter , the only noise I can hear is the exhaust .. like it should be! Hope the customer brings in the car again for servicing.
Good job Eric!
Such a good video Eric!!!
I am still here Eric! I have been here for years!
Thank you!
Man... I gotta say, but these 70's/80's (i pressume) cars with their American style V8 engines (i pressume) give out, nearly an orgasmic sound to my ears - they're wicked! - all the rumble and thunder heh :D ... And I love how basic and simple it is in the inside; with the vinyl interior and chrome details... Nowadays, all of the cars look the same with their wind-tunnel design and the over use of Alcantara.
Nice job Eric u have to be right on the money when doing that kind of work for sure shimming is tricky to but it sounded great again nice work buddy .... Thanks for the great video...
Nice to see you back Seb @
EricTheCarGuy How was your break?
Awesome Nova. My favorite car.
another epic eric repair
Good work! Car looks and sounds amazing.
Nothing like stepping on the gas of a classic and having a good laugh.
You always have great videos, Thanks
Thank you!
Another good video, thanks for the effort. The more I learn about rear differential work, the more complex it becomes. Wouldn't be easy to do in a back yard without all the specialty tools and adapters.
Eric the car guy aka...
The goat
Bossman
The man, the myth, the legend
Thanks man you truly are the best👍
That was a fantastic video! wonderful job!
Blew up my 10 bolt in my El Camino. Did an 8.8 swap, problem solved.. lol
Arent they pretty much the same?
@@sandchar Well I mean, the 8.8 is a Ford axle. It is much stronger than the factory 7.5 10 bolt that came in my El Camino
@Dizzy Duke Stock fox body 8.8 housing with moser 5 lug axles, re-drilled for 5 X 4.75 lug pattern.
Anyone else yell "oh!!! Oh shit!" Like you actually fell when the camera took a dive?? Lol
Nice work on that gear set!
Nice. Finally some old cars to work on 👍👍
Good mechanic channel,step by steps always.
Nice to see you again, hadn't been here since the Fairmont saga killed your channel for me.
I'm trying to put together a parts list foe a 5 lug conversion on a cb7.
i love how he's like "take it easy the first 500 miles" takes it to the streets and womps on it w confidence hahaha
Same here Eric, I use gaskets whenever I can. I only use RTV based on the mfr's specs.
I bet your smile muscles are sore after that one!! Great job man.
Guess im getting my LS powered nova running tomorrow now lol... cross your fingers for me :)
🤞
Wow-what an enjoyable video. There are not many people around who can actually align a crown wheel and pinion. You can make an excellent video at the same time. Loved it, and I am not even interested in muscle cars.
This is what I enjoy. American muscle. Great video reic, Ken
Great vid!
"Be a gear head!" I love that!
Nice set up Eric. I always set mine up tight and to the toe. I see rears set up past the middle to the heel and they snap the teeth off the ring gear. They always walk out. Good job.
Good video. Great camera work!
I laughed, I cried. Awesome job Eric!!
Hi! I don’t mean to harp on you but when using the bearing separator, you should really turn it 90 degrees so that the press does not force on the bolts that hold the 2 ends together but rather on the separator. You did the same thing when pressing the 10 bolt pinion too… other than that I really like your work and clarity of explanations 👍. Thanks
my buddy had a new 72 nova ss. he almost beat my other buds 67 impala ss. 327 4spd. lotta weight. 327s were bad. great job E.
"Take it easy for the first 500miles" 5 miles down the road WOT!!!! 😆
Haha yeah but as long as you’re not launching from a stop to shock the gears they’ll be alright.
Actually, that was only half throttle, but the owner took it out and raced it the next night. 🤷🏼♂️
EricTheCarGuy oh that’ll definitely make them whine right away. Lol.
@@Nmdixon-cu7vm He raced it the next night, disregarding the 500 mile break in!!
You are broke after 30 miles. There’s lots of cars that never get that bullshit break in. If they whine it’s because the hypoid gear setup was shit. Wouldn’t matter what kind of bullshit break in you gave it.
Thank you for sharing your wonderful videos I enjoy watching your videos I am from South Africa
At about 28:35 I leaned with the picture and almost spilled my beer! lol
I gave you the thumbs up when you asked if I was ok when I fell over...LOL
0:00 - Greetings viewers. Hitchcock vibes.
40:21 - Muscle car laugh, almost but not quite maniacal. Hitchcock vibes.
Of course, the black t-shirt, ball cap and distinguished beard are requirements as well. Nice bloody job ETCG.
Stay gold.
That is one beautiful car!
Eric’s a beast 👍🏽
Great interesting video,
Nice job Eric, I bet you are glad you had that car lift installed. And a cheesy grin on completion.
You are a wizard! Wish You where closer!!
These cars you play with Eric are getting older. The guys I hang with are into giant 4x4s. They run diesels. I doubt if I can find a 12 bolt or 10 bolt these days without looking for a Barn first. Lol. You are good at what you do so you will get better than making a video on a Nova. In Mexico , Nova means - No good.
Man you got nice stuff. Good video
Excellent job. Master. Nice. Video
40:21 I was waiting for it! LOL 500 mile break in 😂!
That was only half throttle.
Well done
Excellent remaking of a rather nasty sounding Diff Eric :-D
You have learnt so much in a very short time.
Very smooth result. :-D
Well done .
As much stress as it sometimes causes, I do like learning new things. Especially when it works out. Thanks for the comment!