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Dana 60 ring & pinion selection help

69 R/T

69 R/T

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Location
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Hey gang, I'm thinking about dropping a set of 4.10's in my R/T to make it quicker and more fun while keeping it all stock ( it was a factory option afterall). Which brand of ring & pinion would be the best deal for quality, price and reduced noise? Thanks!
 
You may want to try a local truck dealer or heavy duty parts retailer. I have purchased several sets of Dana 60 gears, bearings etc. from a local ford dealer. They are all factory Dana parts and have stock most of the time. Good luck
 
The info I got from West Coast Differential was that most of the gears are made in China but the manufacturing procedure has improved considerably since the beginning. They used to cut the gears in three passes, which left a poor finish and that translated to noise and other problems. They are all cut in five passes now so he says the quality is pretty good on some. Who sells the best Chinese stuff I don't know. W C Diff not only sell parts but they rebuild rear ends with the parts they sell so they know what works. They also have a small supply of "take out" gears so you might get a used high quality gear set blessed by them for a good price.

I'd go with a US manufacturer just to keep it local. He said US Gear was good. I'll be doing the exact same thing as you to my Dana in the near future and I will get all my parts from them.
 
Out here in Santa Clara, CA near my home is Rearend Specialties. They quoted me $600 for Dana OEM gear set and installation with 1 day turn around, warranty, etc. That doesn't sound bad to me. All they do is differentials and related components, so I know that this is their specialty, and they're always busy with hot rod type cars.

Oh, Meep-Meep, you can buy new OEM long shaft speedo pinions for about $12 from MoparPartsAmerica.com. Year One want $60 plus for one. All you need is the factory P/N.
 
69 R/T said:
Out here in Santa Clara, CA near my home is Rearend Specialties. They quoted me $600 for Dana OEM gear set and installation with 1 day turn around, warranty, etc. That doesn't sound bad to me. All they do is differentials and related components, so I know that this is their specialty, and they're always busy with hot rod type cars.

Oh, Meep-Meep, you can buy new OEM long shaft speedo pinions for about $12 from MoparPartsAmerica.com. Year One want $60 plus for one. All you need is the factory P/N.
Click to expand...


Really!!?? That's good news. Thanks.
 
Sorry, Meep-Meep, They sent me an email today telling me it's no longer available. Shattered dreams! However, some pinions were superseded to a new series number begining with 5. The dealer can convert it and probably getone. I know the 41-45 are unavailable thru Mopar, but 40 tooth is still good. That'll work with a 28" tire with 4.10's
 
:fit: That figures. I think I'll sign up for the 40T for my 66 and do something else for the 69 RR. That one will get the Passon OD and 4.10's. Hmmm, that comes out to 3.21 final so maybe there's hope using a 3.23 gear. Thanks again for the info!
 
Meep-Meep said:
:fit: That figures. I think I'll sign up for the 40T for my 66 and do something else for the 69 RR. That one will get the Passon OD and 4.10's. Hmmm, that comes out to 3.21 final so maybe there's hope using a 3.23 gear. Thanks again for the info!
Click to expand...

:confused: Unless I missed something, it sounds like you are talking about using a speedometer pinion for a 3.23 rear gear ratio with a higher numerical gear in the rear, based upon final drive ratio at the transmission due to adding an overdrive. I don't see how this would work at all. Your speedometer pinion works to convert total revolutions of the output shaft (driveline and rear end gears) to distance traveled over time. Changing rear end gear ratio affects this conversion, requiring a different speedometer pinion. Changing gears in the transmission has zero effect on this. You will only change the engine RPM to vehicle speed ratio by changing gears, so your overdrive will allow the engine to run at lower speed at a given vehicle speed. But it will not affect the output shaft (and driveline and rear end gear) speeds for a given vehicle speed. Otherwise, you would need a different speedometer pinion for each gear in your transmission.

If I totally misunderstood your post, then I apologize.
 
You're right 72. It only affects the drive shaft rotation vs. gear ratio and tire diameter. I've been doing a lot of research to determine which pinion to use for which tire diameter. Example for me is my current F70-14 26" tire with 4.10's requires a 41 tooth gear, but if i switch to 275-60-15's which are 28" diameter I need a 39 tooth gear.

There's lots of conversion charts and formulas to help determine this on the internet, if anyone wants to learn this stuff. Just punch up "mopar speedometer pinion chart" on your search engine....wow, lots of info.
 
72 Charger SE said:
:confused: Unless I missed something, it sounds like you are talking about using a speedometer pinion for a 3.23 rear gear ratio with a higher numerical gear in the rear, based upon final drive ratio at the transmission due to adding an overdrive. I don't see how this would work at all. Your speedometer pinion works to convert total revolutions of the output shaft (driveline and rear end gears) to distance traveled over time. Changing rear end gear ratio affects this conversion, requiring a different speedometer pinion. Changing gears in the transmission has zero effect on this. You will only change the engine RPM to vehicle speed ratio by changing gears, so your overdrive will allow the engine to run at lower speed at a given vehicle speed. But it will not affect the output shaft (and driveline and rear end gear) speeds for a given vehicle speed. Otherwise, you would need a different speedometer pinion for each gear in your transmission.

If I totally misunderstood your post, then I apologize.
Click to expand...


:brainfart: Yes, you are correct. I got hornswaggled by my own thinking.
 
Its intresting you brought this up on the many different speedometer ratio's.
Years ago in the seventies Chrysler listed the grear ratio's in the dealer book as 3:21/3:23 and 2:71/2:73 on some of the B bodies, the final ratio would depend on the tire size ordered I would guess. But I don't recall any different numbers for the 3:55 or 4:10 ratios.
I also recall an option that was offered called a "Freeway Cruise pakage" which consisted of curise control, a vacuum gauge and 15" tires I think it had a 2:71 axel ratio. I have never seen this option eluded to on any fourms. I think this was in 1969. Wish I could find my dealer books and trim code books.
I had a 74 Charger new 400 4bbl and put a 3:55 in it and it was just awful the poor thing would take off fairly good but it just seemed to run out of steam at about 700 feet. That's when it was new, it didn't take long to change it back to a 2:71.
 
ring and pinion

I'm changing out my 4.10s,which are Richmond Gears,will sell for $1oo,you will need a installtion kit,they sell for around a $119,pm me if interested?
Bill
 
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