Its by lethal performance and they say since its not 4" it has absolutly no clearance issues?
Anyone seen anything about this or have one? I couldn't find anything searching

http://www.lethalperformance.com/pag...riveshaft.html

 

a 4" will fit your car if it is not lowered, alot of people have problems when there stang is lowered and they try a 4" DS but it can still work do not get me wrong, but i am going to stay safe when i order mine and get one smaller than 4"

 

There should be plenty of information on Lethal Performance website. It is a 3.5 inch driveshaft by Driveshaft Shop. They have them available for manual cars in both 600 and 900 hp versions. Apparently, DSS is working on the dampner for an automatic version of the same shaft. Alternatively, Tillman Speed has a good deal for a Coast 3 inch shaft.

You can get a 4 inch shaft, but it you may experience problems if you are lowered ~1.5 inches or routinely carry passengers in the back.

EDIT: My bad, The Coast shaft is 4 inches. The dennys driveshaft is a 3 inch.

 

We've had no problems to date with the Coast 4" driveshaft.

We've sold them to cars with Ultralites, Sport Springs, and Eibach Pro Kits.

As long as pinion angle is correct. NO FITMENT ISSUES.

It weighs 16 pounds, and is $589.99 shipped to the door. Best bang for the buck IMHO.

CR
Tillman Speed
610-497-3711

 

I do have an auto, not lowered right now but possibly, so is anything available for the auto that doesn't have issues currently?

 

No issues with the Coast driveline. Installed on plenty auto's with no vibration issues, etc. I would reccomend that driveshaft the best.

They're 589.99 shipped to the door!

THANKS

CR
Tillman Speed
610-497-3711

 

It works well! but women don't like it as much! ..

 

Here you go. No matter which shaft you go with I highly recommend you at the least get a Adj. UCA to set the pinion angle and it is a MUST HAVE item if lowered. And this goes for any shaft.

http://www.dennysdriveshaft.com/html/ford_mustang.html

Richard

 

a 4" is fine wit ha lwoered car provided you adjsut your pinion angle. even with a 3" shaft if your lowered your pinion angle is off. by gonig with a 3" shaft your still only masking the real problem which is an incorrect pinion angle. Get an adjustable UCa and set your pinion angle back to factory spec and it doesnt matter what size Aluminum DS you go with

 

Thanks for all the info guys.
I know the rotational mass is less and you save weight with replacing the ds, but are there any numbers on what kind of gain I would expect to see at the wheels if I did this mod?

 

Absolutely correct. No matter what driveshaft you go with, pinion angle must be correct.

I will say *knock on wood* we haven't had any problems with pinion angle yet. Every car so far I think has been bolt-on and go! I'm very happy with the Coast units.

CR
Tillman Speed

 

A 3" Shaft also has less rotational mass than the 4"

Some guys even after adjusting the pinion angle have still had clearance issue with a 4" shaft and have had to smash the under carriage with a hammer in certain areas. Not a lot of guys but some.

It is the same thing with lowering some car do not need a adj. panhard bar and thing stay put while other have up to 1" of movement of the rear axle. I am one of those people that had to have the adj. panhard bar as my axle moved almost a full inch to the driverside after lowering.

Richard

 

There are no HP gains, just helping to use the horsepower better. It FEELS like a 20RWHP gain, but you wont see any actual numbers. You get up to RPMs alot quicker.

The coast driveline is one of the lightest units out there so far, weighing in at 16lbs.

CR
Tillman Speed

 

Alright this is the type of comment that is making my decision difficult.

To elaborate then, if this is true, the heavier (~24#s), tho smaller diameter 3" steel shaft (Denny) will take less rotating force to get spining than a lighter (~16#s), tho larger diameter 4" aluminum shaft (Coast). Does everyone agree with that? Any physicist in the crowd?? Does one or the other have less vibration or balance issues at "critical speed" (wtf that is)??

If that is true, then it's an easy decision; Denny's Steel 3", less rotating mass/inertia to get going, AND better clearance (tho not likely an issue in MY situation).

Clear as MUD!!

 

I do not think you can go wrong with either shaft. I originally saw the Coast 3.5? that Tillman is selling and was thinking of buying it. However i was still on the fence as far as clearance issues go since many people have had clearance issues on lowered cars. I then discovered the 3" Denny and it was not only the same diameter as the stock shaft but a lower price than the 3.5" Coast so the choice for me was obvious. The 5lbs difference to me is minimal and the smaller diameter of the 3" shaft i am certain will be better overall. Since they are both good shafts make your choice based on cost.

Richard

 

Okay,

That diameter of the Coast shaft being 1" larger (4" diameter) is also 8lbs lighter. The rotating mass will be less than the competition, and aluminum has much better dampening, or sound characteristics.

The Coast driveshaft is precision balanced to with 1/8 of a gram, and does not have vibration issues as long as pinion angle is correct.

Pinion angle is going to need to be correct no matter what driveshaft you choose.

There is nothing wrong with Denny's driveshafts, and they have been in business for years. I have installed a few of them as well, with no issues and the quality seemed to be A-Okay. I am just very confident of the Coast driveshaft over any of the competing companies.

You will notice a huge difference with the Coast driveshaft. 4" does not lead to any clearance issues, and that rumor has scared some people away who could have had a signifigantly lighter, yet still quality, product.

CR
Tillman Speed
610-497-3711