What is a CV shaft and why do I want one? - Page 6 - JeepForum.com

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post #76 of 158 Old 05-20-2010, 04:42 PM
bhall687
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Wow, I feel like I should pay you for the education that I just received. Thank you for sharing your time and knowledge. I also thank you as I thought at first I would need a SYE for my Rubi. I read earlier today about it and the book you wrote reinforced what I was told earlier. Thank you thank you.

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post #77 of 158 Old 05-20-2010, 09:27 PM Thread Starter
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post #78 of 158 Old 06-09-2010, 07:28 AM
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NICE read and thanks for the great info.

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Last edited by domano 68; 06-09-2010 at 10:02 AM.
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post #79 of 158 Old 07-16-2010, 07:57 AM
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great job. this information is going to help me a lot!
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post #80 of 158 Old 12-08-2010, 09:00 PM
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This may sound retarted, but when you move the pinion angle what does it do to the coils, is this something to worry about or do you have to correct the mounts?
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post #81 of 158 Old 12-08-2010, 09:11 PM Thread Starter
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Quote:
Originally Posted by ColoradoCole View Post
This may sound retarted, but when you move the pinion angle what does it do to the coils, is this something to worry about or do you have to correct the mounts?
its causes a curvature of the spring, and more noticably, a misalignment of the bumpstops. the most pronounced effect is the shocks mount movement, causing the shocks to rub the spring perch.

Search "rear spring relocation" and "outboard" shock mounts. You can outboard the lower rear shock mount, without doing the upper rears (upper rear requires cutting big holes in the frame)

Very good write up:
http://www.jeepforum.com/forum/f9/ou...cation-929056/

More good stuff:
http://www.jeepforum.com/forum/f9/re...ckets-1126962/
http://www.jeepforum.com/forum/f9/re...or-kit-856163/
http://www.jeepforum.com/forum/f9/lo...antage-852221/
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post #82 of 158 Old 12-08-2010, 09:21 PM
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Thanks, i need to do the alignment but wasn't sure about the coils
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post #83 of 158 Old 12-16-2010, 01:42 PM
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I have a jeep for a while but just started upgrading and I can't tell you how much that helped. I am an engineer and fairly mechanical, but never worked with cars much so just explaining the abbreviations was huge.
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post #84 of 158 Old 03-14-2011, 06:27 PM
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Thank you for the info.

THANKS.
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post #85 of 158 Old 03-24-2011, 07:52 PM
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Great job

I was looking for info on this subject as I'm getting vibes from my rear driveshaft & pinion seal is leaking, so looks like an SYE & CV shaft as well as adjustable rear arms, Just Empty Every Pocket,
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post #86 of 158 Old 03-26-2011, 09:52 PM
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Great thread, answered alot, except...

Quote:
A Jeep TJ SWB (non-Rubicon) w/ a 2.5" lift with need a CV Driveshaft
Does this mean that a TJ SWB Rubicon, will also, or will it not need a CV driveshaft at 2.5"?

------

Also I was wondering if doing a body-lift change angles and lift recommendations at all...

After reading this entire thread, lemme ask the experts....

Would a 2004 Rubicon, with a 2" Suspension lift (OME) + 1.25" Body Lift + 1" MML, require or not require a new CV Drive-shaft?
-- Would the 1.25" body and 1" MML, not only allow for a safe T-case angle on a 2" Susupension lift, but also allow for a T-Case/Tummy tuck?

-----------

This thread explains, why only a 1" BL, causes extreme vibration on a 1997 TJ. Gotta be careful before doing it, and do it right.
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post #87 of 158 Old 03-26-2011, 10:08 PM Thread Starter
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Quote:
Originally Posted by awalp View Post
Great thread, answered alot, except...

Does this mean that a TJ SWB Rubicon, will also, or will it not need a CV driveshaft at 2.5"?
What you quoted there doesn't exist in this thread. Re-read the 1st post.

Quote:
Originally Posted by Unlimited04 View Post
Example:
- A ~2" lifted SWB NV231J equipped TJ will most likely experience some vibrations. A small transfer case drop will fix this.
- A 2.5" lifted LJ (LWB TJ) with a NV231J will NOT experience vibrations. No SYE or transfer case drop will be necessary - the driveshaft is long enough the driveline angle is not as severe.
- A 2.5" lifted SWB or LWB NV241J equipped TJ/LJ will most likely NOT require a Double Cardan Shaft. The shorter transfer case allows for a longer driveshaft - less severe angles.
- A 4" lifted NV231J SWB TJ WILL require a SYE or large transfer case drop.
- A 4" lifted NV231J LJ will likely NOT require a SYE. Slight vibes may start at 4-4.5" - pay close attention!! 4-4.5" of lift is about the max you can get out the LJ's single cardan driveshaft without experiencing some vibes. You can most likely do a small transfer case drop (stack washers) to eliminate the vibes, or install a Double Cardan Shaft (SYE for NV231J and Flange style for NV241J)

Quote:
Originally Posted by awalp View Post
Also I was wondering if doing a body-lift change angles and lift recommendations at all...
body lifts do not effect driveline angles at all.

Quote:
Originally Posted by awalp View Post
Would a 2004 Rubicon, with a 2" Suspension lift (OME) + 1.25" Body Lift + 1" MML, require or not require a new CV Drive-shaft?
as stated in the first post, that setup will likely not need a CV shaft.

Quote:
Originally Posted by awalp View Post
-- Would the 1.25" body and 1" MML, not only allow for a safe T-case angle on a 2" Susupension lift, but also allow for a T-Case/Tummy tuck?
what are you asking? a TT adds effective height to the lift. So if you have a 2" lift, with a TT, you've essentially got 4-5" of lift, depending on the TT style. Also covered in Post#1.

Quote:
Originally Posted by awalp View Post
This thread explains, why only a 1" BL, causes extreme vibration on a 1997 TJ. Gotta be careful before doing it, and do it right.
a 1" BL does NOT effect the drivetrain.
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post #88 of 158 Old 03-29-2011, 10:27 AM
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Has anybody heard of a constant velosity joint in a dana 30 shaft. just wondering cuz i havent but i thought it could be interesting

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post #89 of 158 Old 03-29-2011, 02:13 PM Thread Starter
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Quote:
Originally Posted by epeck87 View Post
Has anybody heard of a constant velosity joint in a dana 30 shaft. just wondering cuz i havent but i thought it could be interesting
yes, D30 & D44 CV shafts are available. See here: http://www.rcvperformance.com/store/catalog/index.php

But this thread is about double cardan driveshafts, not front axles.
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post #90 of 158 Old 04-01-2011, 09:35 PM
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I understand, and see that the topic of when a rear driveshaft is required.....

but not, when a front driveshaft is required?

I'm trying to find out whether or not I need to change the front driveshaft on my Rubicon.

I'll have somewhere between 4-5" of lift at the transmission/transfer-case (2" TT Lift + 2" Suspension lift).
-- I believe I need a new rear driveshaft, as it could end up measuring 5" or a partial inch more...
Getting a 2"-6" Lifted Jeep Tom Woods Rear Driveshaft...

At that point, does the front driveshaft need addressed?
-- ~4-5.25" lift... min 2" TT Lift + min 2" Suspension lift
(min = 2 sometimes is 2.5 with the suspension, and 2 could be 2.75 with the Tummy Tuck)

Even though the front is a double driveshaft, are the angles and length going to become an issue?
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