Rear driveshaft extension

[DylanICON]

There is additional droop but its not significant enough to affect drive line.
The biggest factor in the arc the axle follows and thus the amount the drive line plunges is in the spring. An OE spring that is flatter and uses a block is different then an arched spring that eliminates the block. The OE set up follows more of an up and down path as apposed to the aftermarket that moves forward as it droops due to shortening of the front of the spring as its arc increases.

The short of it is that I don't think the drive line plunge, although a known problem with clucking, is significantly affected by these mods. Mine clunked the first week I had it bone stock. I think how we drive them is a big factor in how often the splines need re lubing. I have done mine many times and finally had a new OE drive line put in due to wear on the slip yoke.

Some times when a mechanic is asked to see if anything is wrong they feel obligated to find something.

There isn't room for a much longer drive line. If you do it make sure it doesn't bottom as that would do a lot of damage. Its not the easiest thing to cycle and check as the most compressed state is under hard axle wrap.

 

[Hazzard]

Well that would have meant that practically everyone who has upgraded to rear 3.0's and leafs (Nationals, Deavers, WSI, etc) would have this issue, which I imagine is quite a few. I am surprised this has just now came up, or has it before?

Changing it was piece of mind for me, I didn't care for how it looked and IMO the stock driveshaft is crap compared to most aftermarket ones. My opinion may be jaded as my family has been running ADS driveshafts on our dirt track cars and lifted trucks for years. I think it has came up before KHC, TMX, SDHQ, I think swapped them out on some of their builds.

 

[Boss Hoss]

1st rule of suspension/tire/exhaust/modification! Put it on the rack and let it drop---then look very carefully underneath at everything..... Saved me more than once. Everything is important--be smart and save yourself some grief.

 

[TheJoker]

There is additional droop but its not significant enough to affect drive line.
The biggest factor in the arc the axle follows and thus the amount the drive line plunges is in the spring. An OE spring that is flatter and uses a block is different then an arched spring that eliminates the block. The OE set up follows more of an up and down path as apposed to the aftermarket that moves forward as it droops due to shortening of the front of the spring as its arc increases.

The short of it is that I don't think the drive line plunge, although a known problem with clucking, is significantly affected by these mods. Mine clunked the first week I had it bone stock. I think how we drive them is a big factor in how often the splines need re lubing. I have done mine many times and finally had a new OE drive line put in due to wear on the slip yoke.

Some times when a mechanic is asked to see if anything is wrong they feel obligated to find something.

There isn't room for a much longer drive line. If you do it make sure it doesn't bottom as that would do a lot of damage. Its not the easiest thing to cycle and check as the most compressed state is under hard axle wrap.

This make sense to me. My first question after reading the first post was, if you extend the length of the driveshaft, would it then "bottom out" at full compression? Maybe limit straps would be a better solution???