Dana 60/8-3/4 question

[G-man]

Well what on earth do drag cars run... Dana 60s also?

I mean they run over 1000 HP (those cars)....

[FLG]

Im no expert just going by what ive been told and heard.

Id ask Firefighter Ron or even call Cass (Dr.Diff) and see what he says.

You need to remember alot of those cars are using shortend rears (which are stronger).

[Charger-Bodie]

Well what on earth do drag cars run... Dana 60s also?

I mean they run over 1000 HP (those cars)....

Most Drag cars that dont want a broken rear run a Dana60.....Thats what the Charger Im building will have and what the one I just sold had too............Nothing can compare to the strength of a Dana.

[G-man]

When the diff goes in its going in with 15x12 Wheels on back with 15x15 pro street hoosiers (radials)... if I ever want to I can still run a 15 or so Hoosier D.O.T slick on a 15x12 also. (keeps it looking good and still available slick sizes to run on that size also if I ever want to run a DOT one time) that also means it has to be shortened as a mini tub would be neccessary.

But to me, weight saving is what im after... If a dana can handle say even 2000+ horsepower... well im not running even close to that, so isnt in that sense a dana 60 over kill. Im just trying to handle 600 not 1000+.

I know looks wise the dana is  but howmuch heavier is it... these people made it out like 100kg (220 lbs) or something.

[Blown70]

well the 8 3/4 would handle the 600, after that I would not want one myself.  Others opinions may vary.  I do the think the dana 60 is 220lbs MORE than 8 3/4 mabe 40 to 50, I think that was mentioned here or another thread. 

The dana in my car I was told could handle 1500HP without issue for sure..... I may test that one day....

[Cooter]

One thing to remember G-man, ALOT of times, the car is driven harder on the street than at the track (At least that's how it is round here)..

IF your gonna be beatin' on it (IE: Dumping clutch, Bang/screech shifting, etc.) Go with what will most likely stay under there Dana 60...

We ran one of those TKO Tremec 3550 Trans' in a mustang, and only got about 9 passes out of it before it gave up (650 ft. lbs, 393 Windsor)..
Ended up calling the rep and he told us it wouldn't live very long in a "Race" atmosphere...

[G-man]

Hi George,

The torque and weight of your car will break any 8 3/4" if the car hooks up
under hard acceleration.

Narrowed truck Dana 60 rears are heavy 

I recommend a NEW Dana 60 assembly, 
built with a lightweight casting and 1/4" wall DOM axle tubes.  It only
weighs 40 lbs more than an 8 3/4". 

Thanks DrDiff

[FLG]

There ya go 

[Cooter]

I expect this will change when and If I go back to a 4 gear in my Dart, but I've run 6.80's with a 505 C.I. stroker with 727 4000 Stall DOT tires, with a 180 60 ft. On an 8 3/4 with 3.91 gears and stock shortened axles...Course, Knock on wood, It could break tomorrow too....

[69charger440]

Well there is a reason chrysler put the Dana 60 in the 440 and 426 hemi four speed cars. They simply hold to torque without breaking. Plus as mentioned you are going to have the power of the engine plus the wiegh of the car fighting the rearend until you start moving foward. Plus, a Dana 60 cant hurt the value of the car any. Just my opinion.

[G-man]

Well there is a reason chrysler put the Dana 60 in the 440 and 426 hemi four speed cars. They simply hold to torque without breaking. Plus as mentioned you are going to have the power of the engine plus the wiegh of the car fighting the rearend until you start moving foward. Plus, a Dana 60 cant hurt the value of the car any. Just my opinion.

It will hurt value... make it worth more 

Did i mention they look way nicer under there? 

[62 Max]

Well there is a reason chrysler put the Dana 60 in the 440 and 426 hemi four speed cars. They simply hold to torque without breaking. Plus as mentioned you are going to have the power of the engine plus the wiegh of the car fighting the rearend until you start moving foward. Plus, a Dana 60 cant hurt the value of the car any. Just my opinion.

Well,I'll say it again!

Stop and think what was in the Max Wedge / Race Hemi / Altered wheelbase  cars before the Dana came into play in 1966. 

[69charger440]

you make a good point. It is your car. I was struggling with this also and i happen to come across a dana at a cheap price. What ever you choose i hope it works well for you. I am sure both will work if done right. Good luck

[G-man]

Well there is a reason chrysler put the Dana 60 in the 440 and 426 hemi four speed cars. They simply hold to torque without breaking. Plus as mentioned you are going to have the power of the engine plus the wiegh of the car fighting the rearend until you start moving foward. Plus, a Dana 60 cant hurt the value of the car any. Just my opinion.

Well,I'll say it again!

Stop and think what was in the Max Wedge / Race Hemi / Altered wheelbase  cars before the Dana came into play in 1966. 

I got no clue what was in them, how heavy they were, howmuch power went through them, how long did they last. I have NO idea so its hard to think what was in them.

Please elaborate in detail

[62 Max]

Well there is a reason chrysler put the Dana 60 in the 440 and 426 hemi four speed cars. They simply hold to torque without breaking. Plus as mentioned you are going to have the power of the engine plus the wiegh of the car fighting the rearend until you start moving foward. Plus, a Dana 60 cant hurt the value of the car any. Just my opinion.

Well,I'll say it again!

Stop and think what was in the Max Wedge / Race Hemi / Altered wheelbase  cars before the Dana came into play in 1966. 

I got no clue what was in them, how heavy they were, howmuch power went through them, how long did they last. I have NO idea so its hard to think what was in them.

Please elaborate in detail

All were 8 3/4 rear,tapered axle from 62/64 then flange in 65.
Take some time and read this.
http://board.moparts.org/ubbthreads/showflat.php?Number=3257129

[G-man]

Thanks

I read it all... didnt really say anything to do with how long they lasted or anything, just gave 'this car ran 12 seconds, street cars etc etc'

Dunno, maybe it was wrong link?

But heres another I got from DrDiff when I asked about the old 64 Hemi cars etc.

Stock stroke, lightweight, automatic cars can run 8 3/4" rears.  '60s top
fuel dragsters also used 8 3/4" rearends. 

Torque, traction and weight will break 8 3/4" rears regardless of the 1/4
mile ET, however.  For example, my friend's 383/4 speed SuperBee was fine
until he swapped in a 440.  After that, the 12 second car couldn't make 1
pass without breaking the 8 3/4 rear.  After 2 sets of axles and 2
third-members, I built him a Dana 60.  No more problems.

Cass

[maxwellwedge]

I ran an 8-3/4, 4.30 gears, Auto, 4800 stall 685 Horse 440 Challenger with 10" slicks (and stock axles) many years at the strip with no problems. I was probably lucky with the stock axles but I never heard a whimper out of that rear end. Got near 11.00 flat et's before I sold the car.

[G-man]

I ran an 8-3/4, 4.30 gears, Auto, 4800 stall 685 Horse 440 Challenger with 10" slicks (and stock axles) many years at the strip with no problems. I was probably lucky with the stock axles but I never heard a whimper out of that rear end. Got near 11.00 flat et's before I sold the car.

Probbably because it wasnt a Manual car that shocks it more so.