7260 versus 7290 ujoint?

[shadango]

Is it safe to assume that the 7290 series u jpints can take more abuse in general?

I am planning a rear chunk change to 3.55s...currently have the smaller 7260 driveshaft, but was planning on going with the 7290 pinion yoke when I get my new diff and use the conversion ujoint.

But, i was also planning on getting my (used, stock) driveshaft balanced and checked, and new spicer ujoints installed when that is done.....I also am wodnering about my front yoke so was going to have that checked.

Well, mancini has a complete driveshaft/yoke/spicer 7290 ujpint combo, ready to install, for  $324.

Seems like I will spend at least $200 in balancing and new joints and I will still have the small jointed shaft...and that assumes my yoke is ok........so maybe it just makes sense to go  this route "for just a few dollars more" ?

Anyone ever buy a shaft from mancini?

[Jesus H Chrysler]

I can't comment on the Mancini piece, but I've had good luck with the business I've done with them over the years.

Do you have any "FleetPride" stores near you?  Or other similar heavy duty truck stores?  I have one in town and they can rebuild/modify driveshafts for almost any application.  They are not that expensive depending on what you are looking for.  You can have a new shaft built with the beefiest u-joints you can find.

[Challenger6pak]

The larger U-joint will handle more power and more abuse.  The load is spread across a larger area.  Whether you need it or not will depend on how much power and how much traction you have.

[SBDave]

I regeared my 489 case with a 3.55 and went with the larger 7290 u-joint.  I'm using a conversion Ujoint for now with my old driveshaft.  I will be getting a whole new drive shaft when I figure out which tranny I want (switching from auto 904 to a manual, not sure which one yet).  The 7290 u-joint is larger and stronger.

The conversion Ujoint was pretty expensive though, I think $60 or so.

-Dave

[mopar12372]

i would get the mancini drive shaft 7290 with the 7290 cast pinion with the u-bolts not straps  for the rear . then your good to go .
 it will handle just about EVERY THING you throw at it EXCEPT FOR turbo / supercharger/ NAWZ/ /6.