Build, Break, Repeat (Plus, what all those Mopar rear axle numbers mean) 

Hi Tony, can you think about buying a G-TechPro, this would allow you to do a lot of testing with bottle rocket and other cars before hitting the track for the ultimate test. It seems getting to the track is not always that easy for you, weather, time of year, when tracks are open, track locations, tow vehicle break downs, tracks going up hill, animals that you don't like leaving alone (which I 100% agree with), all the other projects you are working on and you like staying around your area. Get a nice day, find a quiet road, kaboom we have some results, it may not be 100% accurate but will show improvements from modifications done, It would also be a good way to verify how accurate the G-TechPro is. Mount the G-TechPro on dash, make a bracket up to point the camera at G-TechPro and take us for a ride and we can see the real time results as they happen!!! Will end up cheaper than driving to the track all the time to get a time slip :) Your thoughts?

The biggest appeal to this channel is Tony‘s different views vs most channels that just follow each other. Plus his knowledge and history of things is unmatched.

A really smart man once said “we choose to accept this challenge, not because it’s easy, but because it’s hard”. JFK I think

Let's not forget: You let the viewers decide between a 383 and a 318 for Bottle Rocket. The vote was clear, 2 to 1 for the 318!

Back in the late 80's you would hear stories about gentleman like UTG, we respectful called them Gear Heads. They were the guys that you feared to meet their Muscle cars / buillds on the street. The stories were true and made them local legends.

Drove the 225 64 Valiant today. Leaning tower of zen.

Story of my life.. if it ain't broke your not trying hard enough.

"Supposed to take a minute..." Yeah... So true. I couldve built five more cars by now if reality aligned with my initial time estimates!!🤣 Breakage isnt failure. Its just weeding out the weak links. Its progress... Don't let it get you down!!!

Tony, you're the only RU-vidr besides maybe Derek at Vice Grip Garage who actually builds real BUDGET cars. Everyone else is sponsored with thousands in aftermarket parts, and here you are porting and polishing some crusty iron heads to prove a point. You take the intimidation out of building something, which I think is 90% of what happens with new comers to the hobby. Shit breaks, things might not fit right, you'll make mistakes. That's a part of the process. I wasn't spit out of the womb an expert, and the faster I learned that, the easier learning new skills became.

Don't forget the "race"! Build, Race, Break, Repeat. =D Edit: On a side note. I really want to thank you for the information you're sharing with the world. Minds like yours are rare, and you've taught me sooo much when it comes to Mopars. Always wanted to get into them, just didn't know so much about em. I grew up with a father that always talked Chevy talk. It'll be a sad day when you're gone. Atleast you've shared all your knowledge though - Keeping the Mopar dream alive.

Anyone that hasn’t should read “Zen and the Art of Motorcyle Maintenance”. It explains what separates the pretenders from the contenders, and not just in the mechanical world.

I work and pound and scrounge and modify on my 1964 Dodge Polara with a 74 400 bored 40 over with a 83/4 rear end just to get the feeling I used to get watching 1966 batmobile launch from the bat cave when I was 7 years old. Everyone thinks I’m struggling and swearing and having a hell of a time. Quite the opposite, I’m having a great time. Love you uncle Tony, you are the shit!

Do you Tony. Experts will always be on their keyboards.

Dude. Every time I watch a video from you I learn something. You have forgot more than many people will know.

I only do Ls boosted shitbox’s, your videos are so good it translates to fuel injection. Watched your video on timing and learned a lot about off idle timing. Thanks for the good content!

Good overview. I been playing with toy cars longer than you have. Not bragging, just for perspective. B-O-P rears were the choice for a long time. Then the 57 Vette showed up with their sheet metal drop out and it was light and tough (for the time) so a lot of those migrated from wrecks to gas coupes below the A/GS and B/GS classes. Ford 9" were originally designed for the Lincoln to keep the floor as low and flat as possible. Tough'ish, but with a marginal pinion angle... And they tend to absorb HP ... The Mopar 8 3/4 was the go-to rear for almost all the stuff we built at A&W Engineering (Santa Cruz) for street and strip duty. We had full steel cars with roll up windows in the 11's occasionally and the 12's all day long. And they drove on the street (not to LA or anything). This is when the Beach Boys and Jan & Dean were on the radio. It is my all time favorite rear, period. Build it right and you will not break it. You can not build enough HP in a street car, even on E-85 , to break a well built 8 3/4 : D

I enjoy this type of build. This is more on line of what an average guy (not wealthy) can afford. Also a potent 318 that has been built is more interesting than some guy buying a crate big block motor and shooting the car down the track. Keep up the good work UT!

I love the people with clean fingernails that know everything 😂🤣😂

They don’t get it because they are internet mechanics, guys who watch guys like Cleatus McFarland, who have mega dollars that throw mega bucks into their projects. Cleatus doesn’t even do any of the work, he just throws money to the guys in his workshop and they get the job done. Anyone can throw piles of cash into a project and get results because it’s the easy way. Using what you have and developing it is an art that the younger generations just don’t understand.

I love me a coupe for the looks...but a 4-door pillar car for a spirited drive. A bunch of my mates used to rally when I was a kid, and no-one ever even considered a hardtop, as they were not just more floppy, but also heavier - and when you're on a budget and don't have unlimited power at your disposal, weight vs rigidity vs power becomes a huge issue.

Do to a chain of event's I've never owned or worked on a classic mopar. But that being said I do love them and never get sick of hearing utg explain in detail the ins and outs of them great channel keep up the great work.

Most of the time it's not using the parts you want,but the parts you have.

Oh goodie ! The "experts". Great vid Tony.

You do know square socket drain plugs are a test set by the Auto Gods? The sacrifice of plug and socket, along with a little sweat, blood and knuckle skin keeps them sweet. It's part of Auto Karma. Keeps the universe in balance.

Super cool speech man, I am working on a 1958 plymouth 318A, just saw your overview of that platform. I am tearing it apart today, its seized. You are inspiring to work on this mil and return it to running! Goes in my 1959 Plymouth Suburban hehe.

I love the honesty on this channel, thank you Sir for the lesson.

Brilliant video mate. Love the nerdyness of this particular video. Keep them coming!!!!

Keep up the great work Uncle Tony , you clearly know your stuff !! Nice to see knowledge in action !!

Another really great video by the man from Uncle. It has snowed about a total of 4" a few days here in the north of the U.P. of Michigan, so it's refreshing to watch a video about getting your 8 3/4" rear end in gear.

TONY, you are a "Renaissance Man" of sorts. We (that enjoy your channel) love how brutally honest you are about yourself and car culture as a whole. We are a fringe group, and we appreciate your insight. Thanks Again

Man I’ve wondered forever about all this eight and three quarter rears. All of the different casing numbers had me confused and I didn’t know if I could use different center sections with the different numbers in the same housing

I love bottle rocket and the parts your using and why your using those parts. It's different and thats why it's cool

This is why I love your channel! There's a lot more to learn working with unlikely parts. It's like making the best barbeque around with cheap cuts of meat. Now I'm hungry!

Thank you so much UTG for inspiring me to do something I always dreamt. My parents were married back in 1977 in a firebird ta and on their 43rd anniversary I got them a fixer up 1977 firebird formula and they haven’t left it alone since

A really smart man said to me don’t buy anything new past 2000 for a daily driver because every thing new is cheep . I’ve worked n the stuff I’ve seen it used it and broke it and let me tell yeah the new stuff is disposable Dixies

I've been so happy with all the 318's my family has had. They were all workhorse/daily drivers but those were such good engines. Theyve all lasted 250k miles easy with no rebuilds.. mostly the bodies rusted out due to Michigan winters. When I get an older daily driver ill be looking for a 318.

Hey any chance u could do an episode on how to set up a rear end? Gearing ? Tolerances ? A real how it works and why and the set up of it. Lash etc. it’s one of the only things I’ve never delved into for fear of F’n it up. Thanks T

in the wise words of Bob Ross, "we dont make mistakes, just happy little accidents."

If I had a $1 for every time I said 'this'll only take a few minutes . . .' and it turned into that hours long nightmare, I'd be rich! Rust is The Great Time Monster here in Western PA. Unless it's one of my fair-weather drivers, it's usually a wrestling match to get stuff apart. On another note, love to see you talk about the 9 1/4" axles. Vans and trucks tend to run those, and in the case of a van, the housing is the widest of all and is van-specific. So unless I want to get into more than just an R&R rebuild or upgrade, I need to stick with those. Thanks for some great real-life average car guy tips Uncle Tony!

We have to booger things up once in awhile to learn from our mistakes.

To the point !! and some good points made. Watching with interest. Put a smile on my dial when you upgraded the pressure plate springs as i suggested. Thanks for the info on the old 8 3/4 rears. I still run a boheemouth mopar 4speed box behind my BB chev , its great !! Tremic schmemic haha Cheers.

Breakage on rodding is expected. Breakage on grocery getters are a pain in the ass...LOL

I never once questioned why the 318. If you are looking to get into something without breaking the bank there must be a million cars with a 318. I am holding out for that stroker 400 build though. I remember the MOPAR Action article on the 470 and tell everyone it's a 383, too cool.

Ahhh... The game show Weakest Link comes to mind.

Uncle your awesome for this knowledge being handed down to us

The amount of people that jump on me about my Pontiac 350 is insane. I have multiple 400s and 455s. I just like how the 350 performs and a running engine is $200.

Love the Road Runner Uncle Tony!!!

Just the video I needed right now. Thanks Tony!

If one more person tells me to stop my inline 200 Mustang build, and "Just put a 302 in it." ... I'm gonna get thrown in prison.

Nice new jacket uncle T I see you went up a size 👍 Keep up the good work!

My daily driver breaking is definitely a failure. The race car breaking in practice means that you know what *won't* break in the race.

back decades ago i swapped a challenger 8-3/4" mopar into my poncho that was running a 427 inch rat at around 660hp lz1 with the huge solid cam and no torque below 3k and 4 speed 30lb FW. it had previously ate a series of built 10 bolts , a couple 12 bolts and one dana. this old morpar rear was still in this poncho when i retired the car a couple decades later.

Im too broke to learn lessons that way so when I'm building my big ford mud and trail trucks I try to go as overkill as possible. Costs more upfront but I sleep better knowing the weakest link is me lol. Of course I'm a young man who just bought his first house so I don't have loads of cash either way

Any interest, if Bottle Rocket will be ready, to take a shot at the Mopar vs BrandX show down in Alabama in November that Rattymusclecars puts on?

Love this shit. Love hearing about old school automobile engineering.

This is exactly why they say, don't take your rear end fluid out until you take the plug out first. If you cannot put oil in you are screwed....

I've been using my old 60 pickup as a daily. It's been an experience but I'll tell you what, for 60 years on the same 6 cylinder and worn out Muncie, that thing still gets me from A to B. She just does it.. abstract like..

I read 30 or more years ago that successful executives are NOT those who are right all the time. Rather, the successful executives are those who will MAKE A DECISION and then ride out the consequences, right or wrong. So, this is an approach that works.

I broke the trans in my daily driver 65 GTO four times this summer. So I put in something that will handle the power a bit longer, and now its faster.. not slipping into 2nd makes a big difference. I got ten years out of the 700R4 I built for that engine. I enjoy working on my cars, almost as much as I enjoy driving them. Old cars break stuff, it just happens. I like to build cars with stuff I have laying around, see how fast I can make it go, and do it for as little cash as possible.They break all the time, in small strange ways, not usually engines, transmissions and rear ends. Its shifter linkages, electrical, and tires. It breaks I fix it. Its an opportunity to make it better, do an upgrade, or replace problems entirely.

We need more old school tech like this please

LMAO Don't you just love trial and error!!! LOL Love your videos even though I am a Chevy guy , Iam trying to find a 50 ford Pickup. They are hard to find in Canada. I love the look of them!!!!

Been there. I had friends that wanted nothing but stock. They never got what I was going for with any build I did. I'm a bit jealous though. Then and now you needed a big budget to be a Mopar guy.

Just a four door Taxicab? One of the holy grails for me would be a 1970 Fury I factory taxi package with a 318. Just try to find one of those....

If it ain't broke, you ain't tryin.

Tony, i know fugall about cars. but I like your videos. keep it up man.

UT has reached his tolerance for keyboard experts lol

Im a big fan of the 8 3/4". Best of all worlds. Most of all, im addicted to Bottle Rocket. Im going to find one of these, as the coupes are all bought up, and way out of my price point. Really enjoying the unconventional theory behind the 4 speed O. D. trans!

I had a Dana from a '68 B body that was perfect for a 70 Cuda. About 2" narrower, and I relocated the spring perches for the Cuda. just right width for Torque Thrust wheels.

As always great info

Race and replace. I like the roadrunner. Imagine going to remove that drain plug with the rear end installed.

I can attest to your rear end logic as well from a GM stand point. I can only SQUEEK by on a GM 7.5 rear end (G Body) with Drag Radials with a "Stout" SBC350. Being the case, running Full Slicks is certain death and the car is also a Fun Bracket Car.... Build For Purpose...Love ya Unc Tone/Kathy

Funny thing - for the straight line cars we always used a 8-3/4, for the circle track - 9.0. Never heard of the 8-3/4 axle brgs you're talking about. Hopefully I'll learn something!

Yep... I was wondering if it had a driveshaft loop, LOL.

Holy crap tony! That was a good show man! What got into you!? These are the kind of shows you need to start doing.

Thanks from one Tony to another Tony. ;)

What a wealth of knowledge.......

Tony. Love that 318. Want to put it in my 65 Dart.

I am with YOU TONY

Most people don’t want to bother with doing things the fun way, they want something that someone else has done all the hard work on. They want to jump straight to the payoff without doing any of the testing or experiments.

In a old issue of Hot Rod magazine they were doing a rear end article this was a good 20 years ago they said the 8.3/4 in its stock form was stronger than a Ford 9 inch they said the Dana was the strongest from the big 3 they even said the 8.1/4 was quite strong but the smaller 7 inch Mopar rear they said to avoid at all cost the 8.3/4 LSD has been great for me 20+ years no problems.

I have a 69 8 3/4 full rear thats just laying here. Well actually a full 69 charger drivetrain just laying here I could donate to your channel.

Thanks Uncle T!

8 and 3/4 in my hotrod blown early 392 with 3.73 sure grip and had the caps replaced with steel caps by Mark Williams....

Nice info

I recently bought a 66 fury and wanted to know what diff it had. I noticed the brass tag on one of the nuts and bolts had 323 stamped on it, I'm sure that means it's a 3:23 ratio. The casting had a large 2 and small 2070742 and a small A with a circle around it, just above that casting number. Your explanation cleared up the casting questions I had. Thanks. It seems that this one is plenty strong for what my needs are. This one should be fine for stock 383.

I run an 8 3/4 in my altered, solid mounted. The thing takes serious abuse.

I see less about differentials on RU-vid that any other component, yet they're one of the most often broken components when a car has good traction. We especially don't see the kind of detail you're providing on the individual parts.

i ruled the streets of kc in 1969 with a formula S cuda and i like to see the 273 build you were gonna do,273's are magic,a thorn in the foot of big blocks,everywhere,where gears and no weight kicks ass

HEY, UNK T- YOU have that 'Waitin' for the airstrike' look about you.... Did you pass the word along? Poor Unk C ... Does she get the honor of being an 'I...witness?' God bless, BRIAN.

I know cost is a factor but I would be stepping up to some 35 spline axles. Only one direction your going with a spool and a broken 50 year old a axle. However, it is light and a small block, probably fine.

Uncle Tony, could you take us through the rebuild of the 8 3/4 centre? I know it takes some time but basics would be good...everyone seems to think its a dark art, but its something you can do at home with a little knowledge and patience

I build and try not to break cause I PORE.

love the video Tony ! i have a 8 3/4 in my 73 Charger with A833 400 engine (originally 318 - 904 ) i have a vibration at 45 MPH + turned out the driveshaft is short hopefully will go away when extending it , can you do a video about installing the differential pinion bearing and seal install please ( am not a mechanic ) , greetings from Lebanon

I remember you asking your viewers if you should build a 383 or 318 , and alot of people said 318 . Hope the rear end works out . Would like to see a 383 build . Lots of people say there dogs but it just don't seem right . I am sure there is a right way to do it

I'm Glad Uncle Tony is RU-vid Verified now with that Checkmark now I do Trust everything he says :D :D, All Jokes aside Good Channel man!!!!!

Breakage is the best way to identify the weak link.

Build try not to break and build more but it never works that way, your right build and love as you build......

Does the 742 case have a larger front bearing? It seems that the front pinion bearing was always a weakness on the Mopars.

I use most of this knowledge to help improve my builds(i mainly work on engines that know likes in New Zealand for example Rb20E a Nissan engine most people know RB26DETT and the E series from Toyota witch is 1 liter to 1.6 liters.) its mainly the same but not really.

Sad you didn’t talk about the different Ratios for the 489,or how to actually build it,I was trying to get info since I removed mine out of my 71 RR Yesterday,my outer bearings seemed sloppy or maybe that’s normal Love your Vids