Driveshaft dilemma....

[tunkx90]

Been reading through numerous other threads on driveshaft lengths and I need some expert opinions. What I have is a '73 40 with a newer frame (with disk brake front differential .) The 3-speed trans was also replaced with a 4-speed trans and 4-speed transfer case. I believe it also has a 4 inch lift. I've got the original driveshafts from the 3-speed and another set from the 4-speed that measure 20.5" in the rear and 28.5" for the front (compressed length.) So, assume i've got all parts from about a 1976 model. The rear driveshaft works fine, but the front one is too short. Is this a result of the lift? I'm measuring 33" flange to flange in the front. Nowhere could I find anyone mentioning that length. What are the best options here?

 

[JackA]

Take it to a driveshaft shop and have it lengthened. No biggie

 

[tunkx90]

I called a driveshaft and got a ballpark estimate of $150-200 to re-tube or lengthen. Does that sound about right?

 

[tunkx90]

Estimate was from a local shop.

 

[JackA]

Sounds expensive, but it depends on the area.

 

[jcj_78FJ40]

Post up on the CLCC site. They are a very helpful bunch of guys that are local to you.

I'm wondering if your front springs are "flipped" or rotated 180 deg.

 

[65swb45]

I called a driveshaft and got a ballpark estimate of $150-200 to re-tube or lengthen. Does that sound about right?

It’s in the ballpark for your neck of the woods. Like @jcj_78FJ40 suggested, the CLCC guys will know if there’s a better deal around.

Keeping in mind that the front is only used offroad, I wouldn’t be surprised if more than one of them has a DIY shaft on their rig.

 

[tunkx90]

Just got an updated estimate from a Fleetpride Truck shop location. They want $265 to lengthen my driveshaft. Isn't that very high?

 

[mdsims]

Why worry about it if you have other quotes $150-200? Those prices sounds fine. Doubt I can do it for that here in the CA Bay Area.

 

[tunkx90]

To answer the question if my springs are flipped or rotated 180 degrees, here's what they look like.....

 

[tunkx90]

Now, that I took a closer look, I think my springs are rotated. Look for far forward the axle sits in the fender well in this pic. Can anyone confirm it's wrong?

 

[pb4ugo]

They appear to be flipped.

 

[David70FJ40]

Rather than fret about the cost, what is it worth to have professionally refurbished drive shafts? Find the shop with the best reputation and stake your life on that.

 

[germaneighter]

I just had one re-tubed and balanced for $135 at Drive Shafts Inc in Tulsa. Did not include cleaning, blasting or painting. (did that myself)

 

[crashn]

Right or wrong?

Now, that I took a closer look, I think my springs are rotated. Look for far forward the axle sits in the fender well in this pic. Can anyone confirm it's wrong?View attachment 1611910

They look reversed compared to the factory stance. However the longer wheel base is desired by some folks. I noticed the shackles on the front are straight down. If they are loaded right now with the front end weight of the 40 then they will ride very stiff. It is best to have the front shackles leaning to the front on the spring end. This allows the springs to be going in the working position at all times making the ride a little easier. I have noticed that some aftermarket lift kits don't have the spring eyes far enough apart, if that makes sense to U.

If you take a good look of the center pin location on the springs you will find that it is not centered in the length of the spring. U can turn them around pretty easy if you so desire.