Setting Up The THIRD Member - Olds vs Ford Rear Ends for RACING - Ed Smith w
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- เผยแพร่เมื่อ 8 ก.พ. 2025
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Ed Smith shares useful, practical, knowledge from his experiences as a dealer mechanic, then race car builder relating to rear ends aka differentials aka third members.
INCLUDING
Olds third Member
Rear End Rebuild
Ford 9”
Lash Adjustments
Spool for Drag Racing
Rear Wheel Steer
Unequal length Leaf Springs
Center Diff Bump Stop
Axle Wind
Quick Change Axle
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#RearEndRebuild #DifferentialTech #RaceCarMechanic #FordNineInch #DragRacing #AutoMechanics #RearEndTech #ThirdMemberRebuild #RaceCarSetup #OldsmobileRearEnd #QuickChangeAxle #AutomotiveTech #RacingDifferential #SpoolInstall #MechanicTips
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#edsmith #engine #dragracing
Hadda chance to help a NASCAR gear(9' ford) guy, back in theday...and i am sure Ed knows about this...( like he said, " could talk for DAYS about rear ends") ...My buddy always finished a gear set up by "checking the patern". After shimming the pinion, and using the wheels to get backlash right...he would touch a tooth of the ring gear with a highly visable grease. Then spin the pinion through it. This would reveal the "contact patch"... It was the goal to have the area centered on BOTH gear faces(this IS an adjustable situation..pinion depth[shims] & ring gear center line[wheels] can move patch all over) After pinion drag tourqe...and ring gear backlash...THIS was his final quality control. Idea being the center of the pattern was the place of highest contact LOAD. Getting the pattern centered on the face made everything happy. Low noise...proper lubrication...plenty of meat to absorb and disapate heat.
@@500kchevrolet9 Yes ! The one thing missing ! Thanks 👍
I just made same comment about contact area.sorry didn't read till afterwards.
Ed Smith is a God dang national treasure.
Thanks for this video Barry T and Ed! It’s great that you show us your speed secrets. Back in the 1970s people were so secretive about their knowledge they wouldn’t share practically squat!
I appreciate that! To be honest, it took a little time thinking about it before Ed was ready to talk about it… But he finally realized that he would rather share than any of it being lost forever. I appreciate his generosity in that respect! Thank you for your comment, it’s true
Peace of cake. That tool must still be available.
I would be in heaven if I ever got the chance to walk through Ed's shop
These automotive gurus are priceless....thx brother
I could listen to Ed all day 😎 what a fountain of knowledge 👍
You and me both!
I want to thank you guys for this video. My father has that same pinion depth finder tool. It's been a really long time since I watched my father use that tool. He explained everything to me on how it works and what the numbers stamped on the gears mean. Even back then I was still trying to grasp all the information. This video was very helpful for me on refreshing my understanding of the physics of the rear end set up with that cool tool. I do know that if you don't get the pinion depth in the proper spot the ring and pinion gears will be noisy and hum for the rest of its service. Anybody can set up the rear end gears but it takes a special person to set them up and have a nice quiet operation of the differential gears. Thank you again for this video ❤
Awesome- you’re welcome. Your kind words are appreciated 👍🙏🙏
We used to call those Lincoln Lockers . Instant spool.
This is really good 👍... I would love to see 👀 You and Ed are just awesome, Thank you 😊
More to come!
Let's all remember we're here to help and learn ; thanks to all 😇🏁
Thank you 👍
When dude put 456 gear in my 12bolt GM
He used a yellow marking paint to see contact area I think?
Yes to confirm even contact 👍
We could talk about rear ends all day long! Ha ha ha thank you guys always learn so much 👍
You bet! 🤣
If i'm not mistaken he's talking about how to set pinion gear depth !
That’s right! 👍
Setting up a rear differential is a black art that few have the knowledge to perform.
This fellow is a sharp guy. I remember when i was a kid . My friend dad had a 67 Camaro that he use to take to Green Valley race way . He had a 302 he spun to 9500 i think . Anyway i remember Milton told me he use or i think i remember the rear end was a combination on Olds and Pontiac. Sometimes like 57 and 61 ..A combination of the two rear axle assembly. Seems he ran 6.18 gears . He i assume welded on the correct spring perches . I dont remember exactly which u joint he used . He told me but this all happened a long time ago..i wish i had that car now damn
That is a great story, thanks for sharing!
Fantastic video
🙏🙏👍
Would be helpful to teach people how to eliminate the crush sleeve with a solid spacer when setting pinion drag
Thank you for your knowledge and videos USA 🇺🇸 USA 🇺🇸
Thanks for watching!
Good job Ed....sounds like someones porting a set of heads back there
Probably
The balance between hypoid angle and deflection from less, was always better with a dana 60. Now you can get 9 based stuff with 11inch gears
And that's why smart guy's und gals ran Poncho rear ends 🦨 what little stinkers 🤩
You need backlass to allow oil get in between the gears to lubricate them and pull the heat out to keep them from overheating .
Well said about backlash
I had a 1962 Corvette drag car that had a 57 Pontiac rear end, spool and axles narrowed a little. Super strong but heavy but ok for bracket racing. From 1981 to 1998 never had an issue. High 10s with 355 sbc, PG with brake and usually ran 11:90 bracket easy on parts and win more $s… thanks for video.
Awesome! And you’re welcome 👍👍
Thank you so much for the video it was great thank you
You’re welcome! Glad you enjoyed it 👍
I think ED forgot about some of the earlier cars used chain gears lol . scary stuff. Great video ..
I’ll have to ask Alan to talk about chain drives 👍
Pontiac rear ends were the same as the Olds those years mentioned.
I understand that ALL '57-'64 Olds/Pontiac cases are nodular iron (aside from the limited early '60s aluminum Pontiacs). Only nodular cases Ford offered were the Daytona cases.
ITs all about leverage awsome videos
👍🙏🙏
Love Ed's q&a vids. I was wondering what he thinks about usuing the new high horsepower air cooled horizontal shaft motors on the market? Specially Briggs makes a beast of a v-twin "marine" motor thats been dominating the gatortail swamp boat industry for past 5 years. Its under their vanguard brand i belive. I think it could be an amazing kit car power plant. Full pressure, full filtered oil system. 12vdc starter and a standard keyed shaft. I feel like this 75hp bombshell could have easily powered my old 1600cc vw w a pict carb. Advertised as having a whopping 63 horsepower back in 73'
The wear pattern and preload prevailed when l rebuilt my GM 10 bolt
Any go kart tracks out by you guys , looking g to relocate .
What do you think about the 1962 Chevy truck rear end? I found it interesting how it had a 3rd member like a 9 inch Ford and a inspection plate in the back!!!??
I'll ask Ed!
Setting up a different proper is like 3 dimensional chess and a lot of people don’t do it right . I laugh at the ones who think it’s an hour or two with air gun!
Right?
um.....the pontiac/olds 9.3.........both used the same rear till 64...
👍👍
What measuring kit is that?
GS-2 ring and pinion measuring kit. 👍
Why does he not tell the guy in the background to stop with the air tools while hes making a video... Its almost like the guy is purposely ruining the quality of the video.
It’s a working shop. We’re fortunate to interrupt things as it is.
@BarryTsGarage Thank you soooo much to you & the great Ed Smith for all you both work together on these easy to learn & for me try my best to remember or learn l from big Ed as I try my best to follow along the best I humbly can it really is a treat to see how a great informational teacher can teach in a way that I see how Ed sparks my interests in my wonder & interests in the mechanical areas of automotive & I "appreciate it" with all my humble heart 🤍✌️😇🔧🧰
Thanks, your kind words are so encouraging. Thank you for your comment and we appreciate you watching!