has it been decided if a 1 piece driveshaft has been made for the automatic cars without any problems?

 

I have the Coast driveshaft installed on my 07 GT Auto with Steeda Sport springs with no problems. I have had it for almost a week now and no clearance problems at all. Good product and great price at $589 to the door.

 

I have 8,000 miles and 275 passes at the track with my Powerhouse DS, and no problems at all.

 

Don: You know that old joke about someone's problematic car having more miles going up and down on the hoist than on the street... I wonder if your car's got more miles on the track than it does on the street?

 

I sell the Coast Aluminum Driveshafts for $589.99 shipped to the door. I have them back in stock now, too after a week of snow-hell! They fit with GT automatics, no problem. All of the vibration problems, etc are non-existant with the right pinion angle. They're a great product, if you want to know more about it and what's involved in installation, here's the thread:

http://forums.bradbarnett.net/showthread.php?t=60144

They're a 4" aluminum driveshaft, and use Dana Spicer components. They're made from 6061 aluminum, and weigh 17lbs compared to the 39lb stock 2 piece unit. Let me know if you're interested! Here's my contact info, ask for C.R.:

Tillman Speed
www.TillmanSpeed.com
610-497-5776 or 3736

Ron,

I'm glad you've got it installed and on the road! You'll have to send pictures of your ride when you get the chance!

CR
Tillman Speed

 

5000 miles on my Powerhouse aluminum driveshaft.
Twenty runs on the track. Never a shake, shimmy or clunk!

 

haha... It might be close!

 

Why does Ford use a 2 piece anyway?

 

What kind of performance increase did you notice, if at all.

 

they had a vibration and NVH problem they couldn't solve so they just put a bunch of band-aid fixes to cover up the issue i.e. filling the panhard rod with sand( or whatever the heck that stuff is?) axle dampeners, two-piece shaft, back cut ring gear, hydro mounts - large bushings everywhere possible.
i answered your other thread on modular fords so if you need any info about my type of aluminum driveshafts just pm me or do a search i've done about 30 or more for guys on here and other forums. 16.5 lbs oem quality and proven to work with autos. $499+shipping.

 

The difference will be quite substantial. The stock shaft assembly weighs approx. 42 lbs. The Coast aluminum unit is well under 20. Keep in mind that's rotating mass. Mass that the engine must accelerate. That 20 lbs will make a lot bigger difference as rotating mass than it would if removed elsewhere in the car. There is also the added benifit of the natural sound dampening characterstics of aluminum.

 

Exactly correct. To be honest, the only competition to the Coast Aluminum driveshaft is the Powerhouse unit. It's also a very nice design, but it's a little pricey. I wouldn't hesitate to pay the money, as it's a quality product. I'm just saying to coast driveline is identical in quality for a few hundered cheaper!

I just sent out 4 more driveshafts today, so people should be recieving them within the next few days, and we'll get some good reviews!!



Thanks everyone! I hope they work nicely for you!

CR
Tillman Speed

 

I have the coatline from Tillman, I hope to get it installed this week, the snow is finally melting and the temp. is rising. The car has been stored since the weather went bad about 6 wks. ago. I'll let everyone know how it feels after the install.

P.S. Its looks like a well made d/s.

 

I've had the Coast Driveshaft from Tillman Speed on my car for about a week now. I weighed the shaft without the spicer joint and it wieghed 16lbs exactly. I also weighed the stock shaft and it weighed 38.5lbs. So a good drop in wieght.

As far as performance, I haven't been able to push the car here in Michigan because of the snow, and now with the warm weather, the roads are all wet and tires spin. However, the car does get up to speed a lot faster. I don't know if it feels like any horsepower is gained, but it definitely winds up faster. I really have to watch my speed, it seems to wind up that much better.

I think, for me, the best improvement of the shaft is how smooth the car is now. With the old shaft, the car would vibrate in park and when I would idle in drive. Not bad, but you could feel it. Now it is very smooth and winds up fast and smooth. I am no expert, but these are just my observations. I also have 3.73 gears and the shaft was a great compliment to the gears. I would definitely recommend this mod.

 

So how would you correct the pinion angle if you're having vibration issues?

 

The best solution to the problem is adjustable upper control arms. Most people bolt these in, and find that their pinion angle is -2.7 to -3 degrees which is perfect.

CR
Tillman Speed

 

The best solution to the problem is adjustable upper control arms. Most people bolt these in, and find that their pinion angle is -2.7 to -3 degrees which is perfect.

CR
Tillman Speed

 

as long as the drive shaft is smaller then 4" thick you will have no problems

 

Even at 4" thick, I've sold a bunch and so far they've bolted right on without any pinion angle issues. There were a few who had Steeda springs, and a few Pro Kit's. I know we'll run into a snag eventually, here. Or atleast, everyone says we will.

CR
Tillman Speed

 

I got my Coastline d/s installed today, no vibration at all, the car does seem to have more zip, took it 0-100 without a problem seemed to pull much better. Now I have to park it again for awhile they're predicting a foot of snow this week-end.

Must be nice to live in a warm climate year round.lol