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#1 |
Registered User
Join Date: Jun 2000
Location: Festus, Missouri
Posts: 1,005
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Re: Extreme Drops
my truck is a driver also (only on a trailer when its broken) love cruising around as low as i can in my truck... drove it to midwest all truck nats from stl to kc and back and i think it rides better on air then it did from the factory
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*SOLD* 1968 Chevy SWB Fleet 350/350 combo Tach/tilt/buddy buckets Bagged/18" Wheels Black on Black ![]() Project "Pandemic" the Farm Rat 1927 Chevy Capitol Truck Rat rod '30 Model A Frame Dual Carb 5.3 LS http://www.67-72chevytrucks.com/vboa...d.php?t=804162 2007 GMC 4 DOOR 2WD BUILT 5.3 STAGE 3 CAM 93 TUNE LIFTED 22X12 WHEELS 33" TIRES 2023 Jeep RENEGADE Wifes ride |
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#2 |
Registered User
Join Date: Feb 2007
Location: yuma arizona
Posts: 448
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Re: Extreme Drops
can you explain why there would be a problem with vibrations with the driveshaft on an incline since the vibrations are caused from the angles of the ujoints working aginst eachother? or is that not correct?
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#3 |
Registered User
Join Date: Feb 2007
Location: yuma arizona
Posts: 448
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Re: Extreme Drops
can you explain why there would be a problem with vibrations with the driveshaft on an incline since the vibrations are caused from the angles of the ujoints working aginst eachother? or is that not correct?
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#4 | |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 22,137
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Re: Extreme Drops
Quote:
Secondary couple loads brief explanation from Greg Frick @ IEDLS: These loads operate at 90 degrees to the shaft. With equal and opposite angles these loads cancel out and are not an issue. When the angles are equal, but both on the same side of the drive shaft (the top in my case), they add up. The result of additive secondary couple loads is a shaking of the mounts: the transmission and the rear end. This shaking goes everywhere in the car and is very aggravating. An odd feature of the secondary couple load problem is that the farther they are apart the less of a problem they seem to be. Unfortunately there is no rule on how far is far enough or how close is too close. What works in a '53 Studebaker will not work in a bucket T. I have asked more than once for an explanation on the inclined driveshaft issue but haven't gotten any solid feedback. IEDLS has reference material that only states that is the one orientation to avoid. As far as I can tell, the main reason is because that configuration yields excessive working angles for the u-joints. Pages 3-4 explain some typical variations on driveline set-ups: http://www.iedls.com/asp/admin/getFi...&TID=28&FN=PDF
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. Last edited by SCOTI; 02-01-2011 at 12:42 AM. |
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#5 |
Senior Member
Join Date: Dec 2003
Location: Mesa,Az
Posts: 3,981
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Re: Extreme Drops
One thing we must all remember when dealing with "customized" and "altered" trucks, chassis, suspension, drive-trains, etc. is that there is no longer a perfect world scenario. If we were to drive vehicles that were set up according to spec. in its "perfect" form... they would no longer be appealing to us.
Once we have voided our factory warranty by modifying our ride, we must look at our game plan from a different angle (pun intended). We must find the compromise, that allows us to accomplish the MOST of what we want (sometimes we get lucky and accomplish ALL of what we want, but this is not always the case). This may mean that we get conflicting or unclear information from different sources... even professionals. Heck, I could go and see three different doctors for the same illness and be prescribed three seperate remedies! This is just how it goes. And why is it that whenever I call and talk to a wheel manufacturer that they can never tell me the backspacing I need... don't they make wheels and sell them everyday? Oh, they just don't want to be liable and responsible if it doesn't work out and the customer isn't satisfied. Scoti- In your case, your driveline will always slope up in the rear... it's just going to be that way unless you raise your truck another 4"-6". So, what can be done? One real world solution I have recommended and used is a CV or Double Cardon Joint. This will allow the angles to cancel eachother out... no vibrations. I know your drive-line guys told you that's just a band-aid fix... but what other alternatives are there at this point? Maybe raise the truck? ![]()
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www.PorterbuiltFabrication.com Phone: 480-297-2621 E-mail: sales@pbfab.com Find us on FaceBook under Porterbuilt Fabrication Specializing in Chassis and Suspension Components for your Classic Chevrolet Truck. We offer components from the following manufacturers: Porterbuilt Accuair Ridetech (Air Ride Technologies) Air Lift Wilwood Intro Unisteer ECE Gotta Show Air Lift Borgeson CPP Supporting this forum since 2003! |
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#6 | |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 22,137
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Re: Extreme Drops
Quote:
As I mentioned, I'm confident in your recommendation per our discussions. I also wanted a 'fudge' factor built-in so I have the ability (if possible) to adjust the angles just in case. I currently have it set-up w/2.5° @ the trans & 2.2~2.4° down @ the pinion w/the d.shaft slightly sloping down. I haven't gotten over to the truck to measure & see how much material out of the floor this would require removing. This would be my alternative if the numbers we discussed (3° down @ tailshaft, CV @ trans, & as close to 0° @ the pinion as possible) doesn't work.
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. Last edited by SCOTI; 02-01-2011 at 10:36 AM. |
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#7 | |
Registered User
Join Date: Jun 2010
Location: Sandown, NH
Posts: 419
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Re: Extreme Drops
Quote:
http://www.hotrodhotline.com/md/html..._harmonics.php Posted via Mobile Device
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-------------------------------------------------------- 1984 CC Dually - 454 - TH400 - Western Hauler Edition Big plans are coming! My build thread HERE |
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#8 | |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 22,137
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Re: Extreme Drops
Quote:
My buddy also questioned how the d.shaft knows whether it's sloping up or down thus it shouldn't make a difference. This is why I stated earlier that the 'difference' would be that when the shaft slopes upward to the pinion, you calculate the angles differently. The result is typically excessive angles that are nearly impossible to cancel thus why I feel they recommend it to be avoided.
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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#9 |
Registered User
![]() Join Date: Aug 2008
Location: New Orleans Louisiana.....a great place to visit but you wouldn't want to live here!!!
Posts: 883
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Re: Extreme Drops
Hey Scoti how far from Dallas to Columbus....y'all only have about six months!
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Down......with the sickness!! |
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#10 |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 22,137
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Re: Extreme Drops
17hrs straight through..... been there & done it so I know what to expect. This truck will make that drive.
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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#11 | |
Registered User
Join Date: Jun 2010
Location: Sandown, NH
Posts: 419
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Re: Extreme Drops
Quote:
http://www.drivetrain.com/parts_cata..._problems.html Posted via Mobile Device
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-------------------------------------------------------- 1984 CC Dually - 454 - TH400 - Western Hauler Edition Big plans are coming! My build thread HERE |
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#12 | ||
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 22,137
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Re: Extreme Drops
Quote:
Quote:
If the driveshaft is sloping down from the pinion & the pinion is angled down, you would subtract the angles. We'll say the d.shaft is @ that same 2° up & the pinion is 3°dn: 3-2 = 1° working angle. The numbers yield a 4° difference.
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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#13 |
Registered User
Join Date: Oct 2007
Location: Wilsonville Or
Posts: 705
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Re: Extreme Drops
SCOTI -
I know this isn't a Chevy but the point still stands the same... I bought a Hardbody ('97) brand new with 3 miles on it. When it had only 794 it was in my garage on jack stands getting a static drop with the frame 2 1/4" off the ground, that's pretty low. Driveline was pointed up for sure! I put lots of trips on the truck around 700 miles or so with zero issues ever. Sold the truck with over 24k on it and the driveline nor u joints were ever replaced. And no the truck was not abused either, no dents, scratches, or stains. -The driveline angles might never be completely perfect but you can make it work. I think the driveline companies might be scaring you a little bit. Like you said, do it right the first time and it will be just fine! |
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#14 |
Registered User
Join Date: Nov 2010
Location: california
Posts: 631
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Re: Extreme Drops
heavey metal that Justin Drove 2300 miles each way from Ventura, CA to Indianapolis, IN
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#15 |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 22,137
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Re: Extreme Drops
Ok, I knew what vehicle you were talking about.
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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#16 |
Registered User
Join Date: Nov 2010
Location: california
Posts: 631
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Re: Extreme Drops
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#17 |
Registered User
Join Date: Oct 2008
Location: oxnard ca
Posts: 2,201
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Re: Extreme Drops
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#18 | |
Registered User
Join Date: Sep 2008
Location: CASA GRANDE AZ
Posts: 4,276
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Re: Extreme Drops
Quote:
Posted via Mobile Device
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70 SWB STEPSIDE 70 BLAZER 09 challenger |
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#19 |
Registered User
Join Date: Oct 2008
Location: oxnard ca
Posts: 2,201
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Re: Extreme Drops
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#20 |
Registered User
Join Date: Oct 2008
Location: oxnard ca
Posts: 2,201
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Re: Extreme Drops
What happen guys nobody wants to come out and play!
Justin |
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#21 |
Registered User
Join Date: Oct 2007
Location: Wilsonville Or
Posts: 705
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Re: Extreme Drops
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#22 |
Senior Member
Join Date: Dec 2003
Location: Mesa,Az
Posts: 3,981
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Re: Extreme Drops
It would be cool to see some "action" shots of Heavy Metal out on the Interstate! I think I remember hearing it even rained on you guys.
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www.PorterbuiltFabrication.com Phone: 480-297-2621 E-mail: sales@pbfab.com Find us on FaceBook under Porterbuilt Fabrication Specializing in Chassis and Suspension Components for your Classic Chevrolet Truck. We offer components from the following manufacturers: Porterbuilt Accuair Ridetech (Air Ride Technologies) Air Lift Wilwood Intro Unisteer ECE Gotta Show Air Lift Borgeson CPP Supporting this forum since 2003! |
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#23 |
Registered User
Join Date: Nov 2010
Location: california
Posts: 631
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Re: Extreme Drops
I remember seeing it in indy looked like a swiming pool and justin didnt care LOL interior was replaced i think 2-3 times due to un foreseen rain storms
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#24 |
Registered User
Join Date: May 2006
Location: at work
Posts: 2,552
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Re: Extreme Drops
ken, do you have any side shots of that truck so that the wheels can be better seen?
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R.I.P. Killer 71 10/26/07 |
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#25 |
Happy to be here
![]() Join Date: Mar 2000
Location: Cypress, TX
Posts: 39,021
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Re: Extreme Drops
Lets see what I have...
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