*Who knew a mini-series about freaking diff covers could be so engrossing? Thanks Banks!*

As a mechanic, I can honestly say I have never wondered whats going on behind a diff cover. But, happy I came across this video!

Maximum respect due Gale Banks. Not just to make everything he touches faster, but to understand how and then make it available to the public, he deserves a medal ( to go with the coin ).

I feel I went from 0 to 10 on learning and understanding what's going on under those diff covers and I've never considered myself mechanically inclined. Great teaching!

What a legend. Still waking up every day wanting to improve and learn. He's such an inspiration. I would give anything to be that devoted to a cause. At that point, it isn't work anymore.

Who knew synthetic oil turns to milk coffee when spinning😂

Who else needs to change rear differential fluid??

Wow Gale , I’m a retired CATERPILLAR mechanic. I just stumbled across your channel. This video should be required for all mechanics. I concentrated mostly on engines but did rebuild differentials and all other components. This was extremely interesting. Looks like It’s gonna be a binge night. I’m especially interested in the 2020 duramax series. I’m probably gonna buy one later this year. I’m a little Leary of the first years of major design changes though.

Mr. Banks, Thank you for investing in an open honest evaluation. Maybe this testing will lead to a Bank's diff cover that truly performs better than stock.

Name one gas/diesel aftermarket performance company that does as much R & D as this guy does.

Just looking at Gale Banks and hearing him talk with such confidence makes one stop and say, "This guy really knows what he's talking about." Thank you for sharing Mr. Banks.

The actual R&D that Banks does and the know-how is just simply amazing.

This man has forgotten more than I'll ever know.

I know this has been a large investment for your company for a product you don’t even sell. Just know you are really educating the industry. Please keep these kind of videos coming. It just strengthens your brand for honest quality products.

You can tell this man is passionate. Ty you for the information. I learned a lot

A man after my own heart. I work on industrial process and test instrumentation. Consistency and repeatability are the cornerstones of an excellent test (along with consistent test methodology)

I like when Mr Banks gets curious, cool stuff happens when he does.

Never thought I would find the inside of diffs so interesting - Be interested to see a strobe put on the turbulent areas to show the pattern better.

I think I want a Cafe Latte after watching this

Wait... You mean the engineers with a lifetime of experience is smarter than an armchair mechanic!?

Thank you so much for all these great educational videos .... hugely appreciated

Gale Banks ! Thank you for this most informative class and video on where differential fluid goes ! I have been reading about your company for what - at least 40 years or more.. I am so grateful for all your hard work, and for your family sharing you with us over all this time. I hope that you and yours will always be well..

Mr. Banks, I appreciate this video and your “test and prove” attitude. I feel I went from 0 to 10 on learning and understanding what's going on under those diff covers and I've never considered myself mechanically inclined. Great teaching!

"If you delete the drain plug, it is lifetime sealed and should last forever" *Former Ford PTU engineer*

Everyone knows that diff covers with skulls work better.

“I want the knowledge and there’s nowhere to find the knowledge” I feel that a lot

Thanks for the time to make this vid, Gale is an absolute Legend!

I cannot believe how much this caught my interest. I watched every second in awe. Can't wait for more research and details.

Thanks Gale for such a detailed experiment, I am hooked on this series and can't wait to see some data!

Mr. Banks has my most sincere admiration. He has been building amazing machines since I was getting started in the mechanic business in the mid 1970’s. Well done sir. I hope to meet you someday. I would like to know his oil and lube preferences and I’m sure a lot of people would also like to know! For both gasoline/turbo, and diesels! Keep up the stellar work! God bless!

"You want to get the heat, the hell out" --- #LifeGoals

Most rear axle vehicles I have to repair on the axle side including my own it's not all that simple but please let me explain, first it depends on the terrain the vehicle is used flat level roads it's all okay to have the correct level and all so if you do high enough speeds, but I do field repairs on farms that sometimes take me to spots that well is so hard to get that 15mph is speeding and have to be in low range 1st gear for several miles with sometimes sloped badly to one side and had previously a bearing failure on the higher side of the axle. Now I've learned that if you do any off roading with slopes that is to the side it's best to over fill axle but in this it creates another problem and that is with high speeds foaming is a problem so you have to sacrifice. But don't just run and overfill your axle just yet just because you're doing a 10 yard slope to the side at 10mph as there'll still be enough lubricant to protect your axle side shaft bearings. Hope you will find this helpful. Oh I've been a field mechanic for 26 years and just something I've picked up over the years.

Gale you look like you are having a lot of fun! I bet you are already working on making a clear squared off cover, can't wait to see the result.

Mr. Banks, great vid. Just had my 8.8 rebuilt recently, of course been looking up info. Your vid has been the best by far. I never subscribe to channels, yours will be the first.

I could watch Gale talk all day. I'm not an engineer or mechanic, rather just a guy who likes to turn the occasional wrench. Love Banks' style. Always impressive.

Such an awesome video! I've been a huge fan of Gale since i was kid back when he was doing stuff with the 7.3 and 6.5 long before anyone else got in the diesel game That and the twin turbo chevy small blocks, Gale is a big part of why i got into automotive. I hope one day to be able to make it out that way and meet him. To be able to shake the hand of a true icon in our automotive world. Keep up the great work guys, your passion is what keeps this industry alive!

First time seeing the dynamic lubrication, great study, thank you Banks!

This is a very remarkable demonstration. Great job. Thank you for sharing. ✌️

Couldn't have asked to find a better and more knowledgeable channel during quarantine. Time to binge and learn stuff

I have been repairing cars for over 40days. This is the first time I ever seen what goes on behind a diff . Great vid

Would have been awesome to see the flow when it was in reverse gear :)

Stock seems to be best and aftermarket is bling! Thank You Mr.Banks

I love your approach. I love the straight talk. Keep it up, Gale!

Thanks Gale and crew at banks power, finally some clarity, insights and updates on this matter for 2021… for me what got me was keyword when doing testing and or data gathering is what Gale have said as well which is Repeatability and consistency And also eliminating factors that might affect the testing.

Great series 👍🏼 But 20 dislikes ?! Must be aftermarket diff cover owners 🤭

I like the idea of aluminum for a differential cover to deplete the heat and keep the viscosity of the oil at a decent temperature! Can imagine how aluminum would work well when towing with a truck! Thank's for sharing!

Just installed my new banks diff cover. Looks great, works awesome. Thanks Gale!

I just rebuilt my read end on my Chevy and was alot easier than it thought it would be! Of coarse I had some guidance from my ol Pops! He is 73 and we actually went to Bessemer State College for Auto Mechanics when i was 17 to 19 years old! U treasure those days!!!! Anyway have a blessed weekend!!!!!

Mr. Banks, I appreciate this video and your “test and prove” attitude. While I agree with you that the flat backed covers are a terrible design, one thing I suspect that might differ from what you are suggesting at 6:40 , is that maintaining an even gap between the ring gear and cover to in fact not be all that beneficial. From working with hydraulic systems, I suspect a reduction in clearance as the oil travels up the back of the cover and over the ring gear is more beneficial as it helps the oil column to maintain the velocity needed for the oil to achieve escape velocity and get thrown into the pinion gallery.

Bloody brilliant and thank you so much for putting this here, the diff, always taken for granted. :)

As a visual learner, this video is a literal god send. I’ll never forget this awesome information!

It's once in a lifetime to be able to see action in the differential. Thank you Sir!

Very interesting test and a great video. We need more content like this on KZfaq

This is a Tremendous video...Thank you so much for making this! You really Know what you are doing!!!

Thanks for the video gale. It was really help ful. I hope your new diff cover design works well.

Great video. The visible enthusiasm is cool to see in your work.

Glad to know if I tilt my diff with shims, front bearing will be getting lubed no matter what angle. Thank You Sir.

Make a plastic cover molded in the shape of the MagHytech one and let see the fluid results

I've been wondering about this for over 10 years.... thank you

Great video, I learned a lot and just ordered the Banks cover for my truck.

I just love how he always wants to know, and if he cant find the data he just throws everything at it and he finds the data!!

Good stuff Gale. I sure miss delivering material to you guys. Keep up the good work.

Awesome video! Awesome visual! Thank you

I always wondered.... and now I know. Thanks for the knowledge, Banks!

Really enjoying this dif cover series

Interesting. Have done differential work and never thought about the way the gear oil is distributed.

I admire people who love to share their knowledge! Thank you Mr Banks.

Thank you very much for taking the time and effort to make these videos Sir. We enjoy every one of them. Thank you for sharing your hard-earned knowledge

I always learn something whenever Gale speaks.

Fascinating information. Thank you, Mr Banks!

Wow!You could not have made a better video! I was gonna buy new covers,now just primer and paint👍,very informative...my eyes are opened.Thank you for taking the time to show us sir,Big thumbs up!👍👍

excellent video...it is very interesting seeing the differential fluid & how it behaves....

I am in the medical field and have many peer reviewed journal articles to my credit. This guy does studies correctly. Too bad many on KZfaq believe anything they see, I think this will show that looks don't equal performance.

I dont know why I'm watching this at 8 am. I don't even have a car... but it's interesting.

This is the first video iv watched an this channel off the bat is amazing great job ur a great mechanic especially to a young kid like myself that is wanting to learn all about how stuff like this works i really appreciate it youve done an amazing job thank you 👍👍👍👍 this channel could really change my life

What a great demonstration! Love it!

thats pretty cool, i like seeing how the inside works in actual motion than an animated 3D video sketch

Without the smooth transition of the cover, over long periods with a cover without that flow direction, one wonders if the lubricant would endure extra shearing forces? Not to mention foaming and the extra oxidation.This all perfectly illustrates what engineers and Spicer and Meritor told me about the way their covers were designed. Good work and I am dying to see the results.

Amazing informative video. This has been a lifelong mystery for me. Thanks for making my day man serious.

Great video! Really enjoyed watching and looking forward to the final results!

Great video and so much great information too 👍👍. Now we just need Banks to make an even better diff cover !

Wow this guy is a professional

Love the knowledge and honesty he is sharing!

Sir, you are so well-spoken. Great video.

Right on! This is awesome.

I really like this guy... So earnest and sincere.

Finally a expert explains the workings of the Differential, excellent

Thank you Mr Banks, you’ve probably forgotten more than I know about oil and transmissions. 👏👍

Fluid dynamics is a science..... Some diff cover makers probably just saw "fluid dynamics" in a book and want to make a cool looking diff cover for the Barbie truck crowd.

This is by far one of the coolest videos I've ever seen.👍 I really like to see how things work in real-world circumstances. Thank you so much and where do I get a plastic dif cover for my 02 Silverado. 😁

Nice to see a well made video by a guy who knows what he's talking about. Thanks!

I dont know if you remember her but my grandmother worked for you out of Azusa from 95 to just about 2005. Her name was jane kusaka and its cool to think she worked for you and now im watching your videos, love everything you do.

Banks is the man for this exact reason! his scientific mind produces the absolute best products.

Awesome video... can't wait for the facts to come out. I love how you're going about it. awesome diff cover by the way. I can only imagine what the results are going to be like based off of what we saw in this video. I cant wait for the next video Thank you for taking the time money ect to do this testing. I'm sure it's been done by Engineers for automobile companies several times but they're not sharing the results and you are so again thank you.

Very informative this is history in the making on differential! Thanks

Amazing video! Thanks for the very clear explanation

Always wanted to know how the RD works, great video

Great Job! Its Awesome that you guys actually moulded a factory reared cover . Thanks Banks !

This is great. I always wondered what was going on in my Dana 44's.

Absolutely fascinating video. I and probably hundreds of thousands of car fanatics have never seen the inside of a diff in action. Now I know why diffs don't have to be filled to the top. One negative, the flashlight reflects and makes it difficult to see some facet of the diff action. Too bad there isn't another device with which to point to the innards. Thank you for making this video