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u joint strength #575172 01/06/10 06:40 PM 01/06/10 06:40 PM
Joined: Sep 2006 Posts: 1,139 West Tennessee R rbstroker OP super stock
rbstroker OP super stock R Joined: Sep 2006 Posts: 1,139 West Tennessee	I am trying to find a chart telling what the strength of the various Mopar u joints might be (7260, 7290, 1330). I currently have a 7260 rear joint and a ball and trunnion front joint in my early bracket car. Not too worried about the B&T but the 7260 gives me something to think about since I am upgrading to bigger tires. This is the land of the free because of the brave

Re: u joint strength [Re: rbstroker] #575173 01/06/10 07:23 PM 01/06/10 07:23 PM
Joined: Jan 2003 Posts: 20,179 Park Forest, IL slantzilla Too Many Posts
slantzilla Too Many Posts Joined: Jan 2003 Posts: 20,179 Park Forest, IL	How fast is the car? I have seen plenty of people running low 10's with 7260's with trans brakes. "Everybody funny, now you funny too."

Re: u joint strength [Re: slantzilla] #575174 01/07/10 11:30 AM 01/07/10 11:30 AM
Joined: Sep 2006 Posts: 1,139 West Tennessee R rbstroker OP super stock
rbstroker OP super stock R Joined: Sep 2006 Posts: 1,139 West Tennessee	7.99 1/8 mile is the target this year. This is the land of the free because of the brave

Re: u joint strength [Re: rbstroker] #575175 01/08/10 12:46 PM 01/08/10 12:46 PM
Joined: Jan 2003 Posts: 5,270 Missouri M MY340 master
MY340 master M Joined: Jan 2003 Posts: 5,270 Missouri	Use a solid 7260 race u-joint if you're not already using one. The guy who built my custom driveshaft used them for my old street driven built 340-4spd Duster since my HP was way more than stock. 1970 FE5 Duster 360/904/3.91's SOLD 1973 TB3 SpaceDuster 340/4spd/4.10's SOLD Moparless for now but when the opportunity is right I'll have another one.

Re: u joint strength [Re: MY340] #575176 01/08/10 08:07 PM 01/08/10 08:07 PM
Joined: Jan 2003 Posts: 5,894 Florida Locomotion master
Locomotion master Joined: Jan 2003 Posts: 5,894 Florida	Quote: Use a solid 7260 race u-joint if you're not already using one. The guy who built my custom driveshaft used them for my old street driven built 340-4spd Duster since my HP was way more than stock. I've been using Spicer solid 7260 u-joints in my car since 1999 and never had a u-joint related problem. However, I did find that the OEM rear end yokes can start to spread and let the u-joint pound themselves out. I went to a billet yoke and no issues for years! I've run 11.31 @ 115 with 1.47 60' times with the wheeels up....weighing 3,540+ lbs! I'm very happy with my 7260 joints.

Re: u joint strength [Re: Locomotion] #575177 01/08/10 08:12 PM 01/08/10 08:12 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Myron do you have a # handy for the 7260 solid Spicer one? I never thought about the solid/hollow difference until I read this (& the other) thread but I'm a quick study and a believer now. live every 24 hour block of time like it's your last day on earth

Re: u joint strength [Re: rbstroker] #575178 01/08/10 09:27 PM 01/08/10 09:27 PM
Joined: Jan 2003 Posts: 20,179 Park Forest, IL slantzilla Too Many Posts
slantzilla Too Many Posts Joined: Jan 2003 Posts: 20,179 Park Forest, IL	Quote: 7.99 1/8 mile is the target this year. My Valiant has been 7:40's with standard NAPA 7260 joints with grease zerks in the caps. "Everybody funny, now you funny too."

Re: u joint strength [Re: slantzilla] #575179 01/08/10 10:14 PM 01/08/10 10:14 PM
Joined: Dec 2007 Posts: 10,542 BROOK PARK, OH WILD BILL Senior Member of the Junior Dragster Club
WILD BILL Senior Member of the Junior Dragster Club Joined: Dec 2007 Posts: 10,542 BROOK PARK, OH	My charger did 7.0 1/8th mile times off a T brake W/ a 7260 front joint and a 7260/7290 conversion joint in the rear Solid joints of course

Re: u joint strength [Re: WILD BILL] #575180 01/08/10 10:26 PM 01/08/10 10:26 PM
Joined: Jun 2006 Posts: 699 Cooperstown, NY jrlegacy23 mopar
jrlegacy23 mopar Joined: Jun 2006 Posts: 699 Cooperstown, NY	To make the U-Joint a little more reliable, if it is greasable, place the grease fitting so it is getting pushed together by the driveshaft turning, not trying to pull the fitting apart. a little off topic, just my... [color:"#00FF00"]68 Fastback Barracuda with some stuff[/color]

Re: u joint strength [Re: jrlegacy23] #575181 01/09/10 11:33 AM 01/09/10 11:33 AM
Joined: Mar 2003 Posts: 15,491 the boonies aarcuda I Live Here
aarcuda I Live Here Joined: Mar 2003 Posts: 15,491 the boonies	a solid ujoint is great for a race car that sees 100 miles a year but for a street car that sees thousands of miles needs to be greased periodically. the zerk makes that possible with ease. ive run the hollows on mine and never broke the cross shaft. i have seen lack of greease destroy rollers and caps though. so i would think that if you were running a 11 or 12 second street car that sees track time, you need the greaseable fittings unless you want to pull the ujoints out every year to grease them It's got a cop motor, a 440 cubic inch plant, it's got cop tires, cop suspensions, cop shocks. It's a model made before catalytic converters so it'll run good on regular gas.

Re: u joint strength [Re: aarcuda] #575182 01/09/10 11:48 AM 01/09/10 11:48 AM
Joined: Jan 2003 Posts: 1,374 Houston,Tx. L Lee446 pro stock
Lee446 pro stock L Joined: Jan 2003 Posts: 1,374 Houston,Tx.	Hey guys, if you go to some of the major driveshaft maker sites, there is a lot of good information available on this subject! One of the is www.drivelineshop.com Go to their specsheets section and it tells you the torque ratings of the commonly available u-joints. it says 7260 rated for 400 ft. lbs. continuous torque, 800 ft. lbs. short duration torque, and 1600 ft. lbs. to failure. 7290 #'s are 550, 1000, and 1875. Dennys driveshaft site also has good relevant info under FAQ's. Lee.

Re: u joint strength [Re: RapidRobert] #575183 01/09/10 01:20 PM 01/09/10 01:20 PM
Joined: Jan 2003 Posts: 5,894 Florida Locomotion master
Locomotion master Joined: Jan 2003 Posts: 5,894 Florida	Quote: Myron do you have a # handy for the 7260 solid Spicer one? I never thought about the solid/hollow difference until I read this (& the other) thread but I'm a quick study and a believer now. Sorry, I don't have the number handy. My driveline guy put them in years ago and I never got around to getting spares. The spares I do have are Brute Force, but he said Spicer is a better joint.

Re: u joint strength [Re: Locomotion] #575184 01/09/10 01:25 PM 01/09/10 01:25 PM
Joined: Mar 2003 Posts: 15,491 the boonies aarcuda I Live Here
aarcuda I Live Here Joined: Mar 2003 Posts: 15,491 the boonies	great, now you all have me thinking I need a new driveshaft with bigger ujoints, yokes etc... It's got a cop motor, a 440 cubic inch plant, it's got cop tires, cop suspensions, cop shocks. It's a model made before catalytic converters so it'll run good on regular gas.

Re: u joint strength [Re: aarcuda] #575185 01/09/10 01:33 PM 01/09/10 01:33 PM
Joined: Feb 2004 Posts: 7,196 Harrisburg, Pa. screamindriver master
screamindriver master Joined: Feb 2004 Posts: 7,196 Harrisburg, Pa.	And another variable to add.... ...I just had a shaft made up this week for a road runner I'm working on...There's a few different syles of solid joints...Some are heat treated and some are'nt...FWIW...I used the spicer solids in past years...This time I went with the brute force heat treated..The shop claimed they were the best with a bigger diameter at the cap than the others and use them in all the serious drag pieces they make..

Re: u joint strength [Re: aarcuda] #575186 01/09/10 01:35 PM 01/09/10 01:35 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Quote: great, now you all have me thinking a need a new driveshaft with bigger ujoints, yokes etc. We dont have any of our own money to spend... live every 24 hour block of time like it's your last day on earth

Re: u joint strength [Re: RapidRobert] #575187 01/09/10 01:50 PM 01/09/10 01:50 PM
Joined: Jul 2003 Posts: 267 Northwest, Ohio 360DOUG enthusiast
360DOUG enthusiast Joined: Jul 2003 Posts: 267 Northwest, Ohio	7260 Spicer solid u-joint # 5-789X. I've been using these on my bracket car for years leaving on a trans brake.

Re: u joint strength [Re: 360DOUG] #575188 01/09/10 04:52 PM 01/09/10 04:52 PM
Joined: Sep 2006 Posts: 1,139 West Tennessee R rbstroker OP super stock
rbstroker OP super stock R Joined: Sep 2006 Posts: 1,139 West Tennessee	Where is the best place to get either the spicer or the Brute Force u-joints? This is the land of the free because of the brave

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