Quote:
A 904 uses a 26 spline and a 727 uses a 29 spline...
weight of the car will make the big difference BUT
you would most likely be better off with the 7290 joint
Quote:X2. Grease em then install and make SURE it's free in both planes in the front and 1 plane in the rear & after the install set the shaft flat on the bench but slightly supported along it's length so with the ujoint caps slightly up off the ground with the ears are at 12 o'clock and 6 o'clock whack the top ear (piece between the shaft and the round cap) solidly with a medium hammer several times then turn it over so the other ear is at 12 o'clock & whack it too then move it back & forth & see if it's totally free. Check it before/after & you'll see the difference. Bang it again if need be. If not free it will not last EDIT use the rounded pein side of the hammer head and do not hit the shaft or the cap and if you are unsure of your accuracy have a helper hold the shaft & you use the hammer and a brass drift
i would think the small 7260 joints will hold up if you use a good joint that has a solid cross and not the hollow ones that get greesed.
i allways go to napa for a spicer super joint with the non-greeseable solid cross.
Quote:Quote:
A 904 uses a 26 spline and a 727 uses a 29 spline...
weight of the car will make the big difference BUT
you would most likely be better off with the 7290 joint
The car is a '69 Barracuda notchback with fiberglass front end. Guessing 3100 lbs-ish
I think I will plan for the 7290 u joints. I will head to the junkyard and get a 904 and 8 3/4 yokes for the 7290. May be hard to get the 8 3/4 yoke off at the junkyard though! I can't get the pinion nut off my 70 Sport Satellite 8 3/4 while its in the car.
Quote:Quote:Quote:
A 904 uses a 26 spline and a 727 uses a 29 spline...
weight of the car will make the big difference BUT
you would most likely be better off with the 7290 joint
The car is a '69 Barracuda notchback with fiberglass front end. Guessing 3100 lbs-ish
I think I will plan for the 7290 u joints. I will head to the junkyard and get a 904 and 8 3/4 yokes for the 7290. May be hard to get the 8 3/4 yoke off at the junkyard though! I can't get the pinion nut off my 70 Sport Satellite 8 3/4 while its in the car.
I don't think you will find a 904 yoke that will take a 7290 u joint!
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I was able to find new 904/7290 yokes for $39 on-line.
Using 7260 u joints would be great since I already have what I need but I'm nervious about using them.
Quote:I have used the 7260 U joints, HD with solid cross shafts, not the standard duty passenger car greaseables ones
I was able to find new 904/7290 yokes for $39 on-line.
Using 7260 u joints would be great since I already have what I need but I'm nervious about using them.
in the rear on my Duster It went 10.34 at 128 MPH weighing 3450 lbs with me in it before I twisted the 8 3/4 housing up bad enough to break the ladder bar brackest off of it 
I did break the stock front 7290 U joint trans yoke and then it spread a new Dana stock cast steel piniion yoke far enough apart to let the locking snap ring on the rear Ujoint to come out 
I ended up buying a new Yukon billet steel 7260 rear pinion yoke from Randys Ring and Pinion after that and never had those problems again, until the housing gave up All the 1963 Max Wedge cars came with 7260 in them, at least all the ones I saw and raced did Make sure and only buy the H.D. solid cross shaft four wheel drive ones 