CVPI Driveshaft

[ddogg626]

Hey Guys
Would it be worth it for me to buy a CVPI driveshaft and install it? I`m running 4`10 gears and get vibration around 100+ with the factory shaft.
So the question is can the CVPI shaft hold up or will it turn into a wet noodle too?

[ntd]

just take yours to a driveshaft shop and have it balanced, if your allready having vibrations cheak your tailshaft bushing for damage

[Stranger in the Black Sedan]

balancing will increase critical speed only if the balance job was imperfect in the first place, beyond a perfect balance you are gonna run into limitations w/ the shaft itself

babbage where are you?

[RacerX]

babbage where are you?
He's busy thinking how he's going to get his time down now that I have N2O... :D Check ebay for driveshafts too...

[Stranger in the Black Sedan]

I did the ebay game, it is tough to get sellers to verify color codes, and then even toughter to get a shaft that does not have dings and cuts in it from rough junkyard handling. It can be done but you have to make sure the seller is willing to accept the shaft back if it ends up being wrong or damaged.

[ddogg626]

What are the codes to a CVPI shaft ??? just so I do not get ripped off.

[FordNut]

Good luck. Get a dynotech carbon fiber shaft. I would normally recommend a Dynotech MMC shaft but they're no longer available. If you pull it and get the measurements and specifications on the front & rear yokes you can get a MMC shaft custom-made from Mark Williams Enterprises.

[ddogg626]

How about Reinharts shaft on his page ??

[DOOM]

Dont we already have CVPI driveshafts???
Thats what i was told in indy when i met steve babcock.

[RacerX]

How about Reinharts shaft on his page ??
I was just thinking that I thought I saw that still advertised on Dennises site.

[fastblackmerc]

I was just thinking that I thought I saw that still advertised on Dennises site.

I'd get yours balanced first. Most large truck shops do it or will tell who they use.

[Stranger in the Black Sedan]

We have CVPI length driveshafts. Most CVPI's use an aluminum shaft similar to the Marauder, but without a damper. Some use an MMC shaft with a higher critical speed than ours. The literature I have found says pink/green stripes or pink/green/blue are MMC. Pink/green/green are stock Marauder plain aluminum and pink/blue/orange are CVPI plain aluminum (without damper). Some of the newer CVPI's have shafts that are different from these color codes but no one has ever chimed in about newer CVPI's having MMC shafts so I couldn't tell you about the new stuff.

All based on what I have read, take it for what its worth.

[offroadkarter]

just take yours to a driveshaft shop and have it balanced, if your allready having vibrations cheak your tailshaft bushing for damage


You can balance a banana, but its still a banana


Good luck. Get a dynotech carbon fiber shaft. I would normally recommend a Dynotech MMC shaft but they're no longer available. If you pull it and get the measurements and specifications on the front & rear yokes you can get a MMC shaft custom-made from Mark Williams Enterprises.

+1 I know someone with the carbon fiber shaft, good quaility stuff


How about Reinharts shaft on his page ??


which is no longer made

[ntd]

[quote=offroadkarter;827585]You can balance a banana, but its still a banana

:banana:good thing driveshafts aren't made out of banana's:banana:

[FordNut]

If you're fixin' to take the car to Europe, you ought to fix it with the best possible solution before you go. Best easy solution is the CF shaft from Dynotech. Best but less easy is the Mark Williams MMC shaft.

[LANDY]

which is no longer made

DISAGREE.
two months ago i had dynotech make me one. i also ordered through Reinhart

[NATEHAWK]

DISAGREE.
two months ago i had dynotech make me one. i also ordered through Reinhart

How much for that?

[LANDY]

$591 plust tax

[LANDY]

Hey Guys
Would it be worth it for me to buy a CVPI driveshaft and install it? I`m running 4`10 gears and get vibration around 100+ with the factory shaft.
So the question is can the CVPI shaft hold up or will it turn into a wet noodle too?
Sir.
i have gone over 140mph with the dynotech driveshaft. i would do it all over again.
i dont know about the DS that comes on the '99 to'00 CV but i believe they are also better than the factory MM.

[DOOM]

I have had my car up to 160mph (stock 3:55's & stock drive shaft) with no vibration.

[LANDY]

I have had my car up to 160mph (stock 3:55's & stock drive shaft) with no vibration.

its kinda funny how some cars don it and some dont.
is yours an '04?
do you think it has sumthing to do with the years?
or the difference in trans on these two years?
:confused:

[DOOM]

Mine is an 04 nates is an 03 we both had our cars doing 160 at the same time! :eek:
I don't think he had any vibration issues either.

[DOOM]

its kinda funny how some cars don it and some dont.
is yours an '04?
do you think it has sumthing to do with the years?
or the difference in trans on these two years?
:confused:

The transmissions are basically the same but the 04's have a slightly higher stall torque converter. I don't know if this will make a diffrence as far as vibration. I doubt it.

[LANDY]

thanks Doom!

[FordNut]

which is no longer made


DISAGREE.
two months ago i had dynotech make me one. i also ordered through Reinhart

They make driveshafts for the Marauder, but they no longer use the MMC material.

[RR|Suki]

I like my 99 CVPI shaft so far and it only cost me $75 :banana2:

[NATEHAWK]

No vibration here

[MrBluGruv]

add 1 to the 160mph+ with no issues. Only vibration I got was not practicing smart braking technique and getting wobble from the rotors. :( I will say though that I don't at all plan on doing it again, not particularly worth it.

BUT, from what I've heard that causes the driveshaft failure, there are two main things that come to mind: #1 EVERY driveshaft will have a critical speed, so ideally the smart thing to do would be to build a stronger tailshaft to insure that even if you can't have the most balanced driveshaft you'll have almost no risk of failure at that point. #2, if it's essentially a harmonic resonance point, theoretically once you go beyond that speed the resonance would drop and the vibration would subside much like an unbalanced tire. Am I crazy and there has been evidence to prove my theory wrong, or am I on to something?

[cougar9150]

Definitely get a good quality driveshaft if you will be hitting the autobahn. If my new ride hadn't come with a dynotech I would be calling PST in Clearwater Fl for a CF one. Quoted me $800-900 2 years ago for the CF and $500-600 for the 6061 4".

I would also recommended the tailshaft forced lubrication mod if you plan on staying at high speeds for a decent period of time just for that extra peace of mind.

[DOOM]

What's the tailshaft lubrication mod??? :confused:

[4play]

Ky?.......

[NATEHAWK]

What's the tailshaft lubrication mod??? :confused:

DR sold a kit for it with a braided hose and some fittings I think. You have to tap the rear tailshaft housing.

[cougar9150]

Ky?.......

That's for tail not tailshafts.

Not 100% sure Doom, Landy pointed it out on my car which has the art carr stage 2 kit. I gave him a confused look but knew i hadn't seen it on my 1st MM.

I looked it up and saw that Darrin offers a forced lube mod for the tailshaft housing. I have seen it mentioned in numerous threads but never saw it till Landy showed me mine.

It has a braided hose that runs to the tailshaft housing that connects to a fitting threaded into the side housing and I guess forces more fluid into the tailshaft housing. I'll take a pick when it is light out tomorrow.

[CRUZTAKER]

Hey Guys
Would it be worth it for me to buy a CVPI driveshaft and install it?

I have been running a CVPI MMC POLICE shaft for years now with 4:10's, gobs of hp, AND MANY >140 MPH jaunts.
No issues.

Your only problem is that Ford stopped making those years ago and all stock was sold or returned to Ford. The drive shaft we have is what was replaced and now used on the police interceptors. I highly doubt you will find a new CVPI MMC POLICE shaft that was rated for those speeds at this junture.

Look else where.

And just to make you really bummed...I got mine new for $180 to the door when the dealerships were fazing them out.
I knew I should bought several for posterity. :rolleyes:

Oh yeah....you few doing 160 with stock shafts...your day is coming lol.
You may not feel it, but that tail shaft is taking a beating.
Do that speed for more than the few seconds you likely did and watch that tranny or diff go to pieces.

[NATEHAWK]

For those looking for the forced lube mod


http://www.blueovalchips.com/index.php?action=item&id=74&prevaction=category&previd=4&prevstart=0

[4play]

That's for tail not tailshafts.

Not 100% sure Doom, Landy pointed it out on my car which has the art carr stage 2 kit. I gave him a confused look but knew i hadn't seen it on my 1st MM.

I looked it up and saw that Darrin offers a forced lube mod for the tailshaft housing. I have seen it mentioned in numerous threads but never saw it till Landy showed me mine.

It has a braided hose that runs to the tailshaft housing that connects to a fitting threaded into the side housing and I guess forces more fluid into the tailshaft housing. I'll take a pick when it is light out tomorrow.

:banghead: I knew that......dure...

[FordNut]

The early version forced tailshaft lube used solid tubing rather than braid. I got mine from Dennis.

It is an integral part of the tailshaft housing for the 4R100, cast into the part rather than added on externally.