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07-15-2003, 07:02 AM | #1 |
One of my kids. Cute eh?
Join Date: Oct 2001
Location: Mitchell, SD
Posts: 1,286
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one piece or two piece driveshaft
OK. I know this has been hashed on the board a few times, but I can't remember what the advice has been regarding going with a one piece or two piece driveshaft. And with seach down....well here is the question again.
I'm putting a 700R4 trans in the 70 Chev pickup. It has a two piece driveshaft now. Should I have that one modified or switch it over to a one piece? I have the driveshaft out of the 85 Sub that I used for a engine/trans donor. Is this driveshaft going to be long enough to use for a start? I'm guessing it is going to be too short. Thanks for the advice so far on this project! Mike
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If a kid asks where rain comes from, I think a cute thing to tell him is “God is crying.” And if he asks why God is crying, another cute thing to tell him is “Probably because of something you did. John 3:16 2006 Chevy HHR 2000 Dodge Durango 1985 Jeep CJ-7 1970 Chevy Pickup |
07-15-2003, 08:25 AM | #2 |
Formerly yellow72custom
Join Date: May 2001
Location: Austin, TX
Posts: 7,531
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A one piece will prevent carrier bearing failiure, since you won't have a carrier bearing, lol. And, next time you replace U-joints, you will only have 2 instead of 3, which will save alot of hassle.
It will cost more to have a 1 piece made than shortening the 2 piece. If you don't want to spend the extra money, get your current shaft shortned, install good-quality U-joints and a carrier bearing, and it should last quite a while before needing attention again.
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'72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg |
07-15-2003, 01:28 PM | #3 |
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Location: Paris, TX
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07-15-2003, 02:02 PM | #4 |
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Join Date: Dec 2001
Location: Dallas, TX USA
Posts: 80
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I have a question too...
I apologize also if this has been covered before, but since we're on the subject...
Does anyone know if there is any power gain or performance difference between the 1 pc. and 2 pc. drive shafts? I always assumed the single shaft was stronger since it didn't have to go through a carrier bearing, But that the 2 pc. was more economical since it spins on a less stressful axis. In other words, the 1 pc shafts are more likely to develop vibration and balance problems. Am I on to something in this line of thinking, or is it all just a myth?
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'72 Super Cheyenne LWB
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07-15-2003, 04:09 PM | #5 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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The main problem with a one piece shaft is they length. Most places will refuse to make a shaft over 6 foot long, and some of the shops who do it...shouldn't
Basicly, the shaft gets too long to support its own weight, and it starts to 'whip' as it spins. |
07-15-2003, 06:38 PM | #6 |
One of my kids. Cute eh?
Join Date: Oct 2001
Location: Mitchell, SD
Posts: 1,286
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Longhornmail,
Any idea how long the drive shaft would be with the 700R4 installed? It is going to be a couple of weeks before I have the engine and trans installed, but would like to try to reach a decision before then. Right now, I'm leaning to keeping the two piece. Looks like it could be less hassle. Any idea if the Sub driveshaft would be long enough for a start point on a one piece? Thanks Mike
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If a kid asks where rain comes from, I think a cute thing to tell him is “God is crying.” And if he asks why God is crying, another cute thing to tell him is “Probably because of something you did. John 3:16 2006 Chevy HHR 2000 Dodge Durango 1985 Jeep CJ-7 1970 Chevy Pickup |
07-15-2003, 07:25 PM | #7 |
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Join Date: Feb 2002
Location: Vacaville, CA
Posts: 2,746
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Probably the best place to start would be to measure the length of your current trans and your new 700R4. That will give you a fair idea how much shorter your drive shafts will have to be. As for using the burb shaft I don't know the length but unless its over 4" in dia. I wouldn't consider using it for the reasons Andy stated.
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70 C/10 Light Red 350/TH350, HEI, Duals w/40 series Flows, 91 seat, LED taillights 99 Pontiac S/C GTP, SLP Ram Air hood, GMPP Konis & springs 95 Neon ACR, MP PCM, AFX UDP, 3.0 CAI |
07-15-2003, 07:32 PM | #8 |
Wiseass secured himself a BAN
Join Date: Nov 2000
Location: MOON!!!
Posts: 2,282
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I have 2 piece and have never had a problem. Stay with the 2 piece.
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07-15-2003, 07:46 PM | #9 |
Senior Member
Join Date: Dec 2001
Location: Redding,CA...USA
Posts: 4,736
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i have a 2 piece on my low 12 second truck
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07-15-2003, 07:54 PM | #10 |
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Join Date: Apr 2000
Location: Frisco, Tx, USA
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This may only hold so much water, but I figure if the technology is still good enough for the newest trucks on the market, it is okay for my 34 yr old truck.
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07-15-2003, 11:07 PM | #11 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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I am unable to tell you...I haven't seen my tranny coparison sheet in ages.
Sorry. |
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