Compression and Droop Talk - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Wrangler Forums > YJ Wrangler Technical Forum > Compression and Droop Talk

Ruffstuff XJ Unirail Channel Reinforcement....Rugged Ridge Modular XHD Snorkel Now for both 3.8L and 3.6RIGID LED Light Blowout Sale - All Sizes, All Series, all

Reply
Unread 01-06-2014, 01:39 PM   #1
flipit
Registered User
1993 YJ Wrangler 
 
Join Date: Jan 2009
Location: East Bay, CA
Posts: 398
Compression and Droop Talk

The main reason I am starting this is for compression,
but I figure droop is good to keep in case anyone is looking,

So what happened here is I was thinking about everything I'll list,
and I got some ideas, but seeing how I've not done anything, thought I might be able to get some intelligent insight.

Where I'm at, I have new to me axles strapped up under the Jeep,
and now It's time for all the final touches- pinion angle, shock and brake length,
and for those who do the gas tank mod I figure that should fit in the conversation as well.

I read through http://www.jeepforum.com/forum/f12/w...droop-1804905/ while Googling to see if I could find the answers I was looking for.

So after all that blabbing, the core of the question.
How can I, or anyone check the max droop and compression for six parts,
the four corners and the two axle centers?

some situations specific to me...
I don't have a forklift,
I haven't found a small ditch or ramp in the near vicinity where my Jeep can currently get to.

The ideas I have had I think are good,
but I have sometimes done some things that some people might call "questionable" or "downright stupid"
so here goes nothin'!

So I've been planning on pulling off my body, for other reasons,
and I was thinking,
what if I ratchet strap the axle to the frame on both sides,
and just crank on it until it doesn't move any more?
Is that a good way to get full center compression?
I figure full center compression will be good to see if the axle can contact the gas tank,
and also see the max compression driveline angle.
then I lift the entire rear end,
and let off the ratchet straps on each side and both sides for full droop.
doing each side will give me my shock and brake line lengths,
and all that can be done in a garage yeah?

so how crazy is my idea?
and what does everyone else do?

__________________
Project #1- http://www.jeepforum.com/forum/f12/5-0-yj-right-way-1799609/
flipit is offline   Reply With Quote Quick reply to this message
Unread 01-06-2014, 02:18 PM   #2
yjcrawlr
Registered User
1990 YJ Wrangler 
 
Join Date: Jan 2008
Location: Southern Oklahoma
Posts: 1,795
How you said you come up with some crazy stupid ideas this is one of those times. The ratchet strap idea is a bad one. Simply find a place to drive and flex your jeep out.
__________________
90 YJ 102 in wb stretch, SOA, dana 60, 14 bolt welded,4.56s, 37in Parnelli jones dirt grips, currie twin stick dana 300, york oba, tractor link traction bar, full custom armor,poison spyder tube fenders, 95Cherokee High Output 4.0
2014 JKU, modified Rubicon Rails, RC stubby with warn 8000m, 2" leveling springs and OME trim spacers, Superchips Flashcal, Spidertrax wheel spacers, rubi shocks, and Lots more mods soon!!!
yjcrawlr is offline   Reply With Quote Quick reply to this message
Unread 01-06-2014, 02:43 PM   #3
flipit
Registered User
1993 YJ Wrangler 
 
Join Date: Jan 2009
Location: East Bay, CA
Posts: 398
I figured the would be the case,
but okay, so the flexing is good for shocks and brakes,
but how can I compress my full rear axle and check the driveshaft and pinion?
__________________
Project #1- http://www.jeepforum.com/forum/f12/5-0-yj-right-way-1799609/
flipit is offline   Reply With Quote Quick reply to this message
Unread 01-06-2014, 03:04 PM   #4
yjcrawlr
Registered User
1990 YJ Wrangler 
 
Join Date: Jan 2008
Location: Southern Oklahoma
Posts: 1,795
Set you pinion and drive shaft up with your jeep on level ground and with its normal weight in it.
__________________
90 YJ 102 in wb stretch, SOA, dana 60, 14 bolt welded,4.56s, 37in Parnelli jones dirt grips, currie twin stick dana 300, york oba, tractor link traction bar, full custom armor,poison spyder tube fenders, 95Cherokee High Output 4.0
2014 JKU, modified Rubicon Rails, RC stubby with warn 8000m, 2" leveling springs and OME trim spacers, Superchips Flashcal, Spidertrax wheel spacers, rubi shocks, and Lots more mods soon!!!
yjcrawlr is offline   Reply With Quote Quick reply to this message
Unread 01-06-2014, 03:14 PM   #5
flipit
Registered User
1993 YJ Wrangler 
 
Join Date: Jan 2009
Location: East Bay, CA
Posts: 398
yeah, that will get the angle right for welding the perches on,
okay, maybe I'm missing a part here.
okay, so you set it at the weight and you weld it,
so lets say its pointing at a 45* angle just for arguments sake,
I have the stock bump stops to keep it from going too far,
but nothing else is stock any more,
so I need to compress it to see where I need to stop it now right?
and if I put any rear stretch on it,
I need to compress it to see if I clip the gas tank skid or not true?
so how does one go about compressing an axle?
__________________
Project #1- http://www.jeepforum.com/forum/f12/5-0-yj-right-way-1799609/
flipit is offline   Reply With Quote Quick reply to this message
Unread 01-06-2014, 03:24 PM   #6
jsawduste
Web Wheeler
2006 YJ Wrangler 
 
Join Date: Jul 2006
Posts: 3,038
I`ve done this a number of times.

Nothing wrong with using the wider ratchet straps for cycling the suspension. A bit of planning where your going to place the strap and remember the kinetic energy stored when tightened down.
jsawduste is offline   Reply With Quote Quick reply to this message
Unread 01-06-2014, 03:32 PM   #7
Anticanman
Follow me
 
Anticanman's Avatar
1994 YJ Wrangler 
 
Join Date: Aug 2009
Location: Ripon, California
Posts: 19,250
If you find yourself near my shop in Ripon, you're welcome to use my forklift. Jam86 has one at work in Byron if you need one closer. I'm sure you could find a local farmer with a loader and ask to borrow it for a few minutes to check.

Just throwing it out there.
__________________
Luck Favours The Prepared
[SIGPIC][/SIGPIC]
Anticanman is offline   Reply With Quote Quick reply to this message
Unread 01-06-2014, 03:36 PM   #8
flipit
Registered User
1993 YJ Wrangler 
 
Join Date: Jan 2009
Location: East Bay, CA
Posts: 398
I got some pretty heavy duty ones I think will hold.
any key spots to place the strap?
and did you fill the bed with some weight to push it down as far as you could then ratchet it the rest of the way?
__________________
Project #1- http://www.jeepforum.com/forum/f12/5-0-yj-right-way-1799609/
flipit is offline   Reply With Quote Quick reply to this message
Unread 01-06-2014, 03:48 PM   #9
flipit
Registered User
1993 YJ Wrangler 
 
Join Date: Jan 2009
Location: East Bay, CA
Posts: 398
Quote:
Originally Posted by Anticanman View Post
If you find yourself near my shop in Ripon, you're welcome to use my forklift. Jam86 has one at work in Byron if you need one closer. I'm sure you could find a local farmer with a loader and ask to borrow it for a few minutes to check.

Just throwing it out there.
Thanks Nick, I appreciate it. Unfortunately Ripon is a bit far without brakes and shocks :P
Jam86 might be a good person to talk to, I had no idea there was another JF member in this tiny town.
I think that last one might be perfect, I got a farmer across the street that's real friendly.

I was thinking about just using a cherry picker on the tire,
but if I can get a forklift conveniently,
that might be the better way to do it.
__________________
Project #1- http://www.jeepforum.com/forum/f12/5-0-yj-right-way-1799609/
flipit is offline   Reply With Quote Quick reply to this message
Unread 01-06-2014, 05:09 PM   #10
jsawduste
Web Wheeler
2006 YJ Wrangler 
 
Join Date: Jul 2006
Posts: 3,038
If you have a trailer then simply load the jeep up and ratchet off the frame to the trailer tie downs.

While trailering that is how I tie my junk down. Chain and chain binders compressing the suspension creating a tight secure package. Rather then just the axles leaving the jeep to bounce uncontrollably.
jsawduste is offline   Reply With Quote Quick reply to this message
Unread 01-06-2014, 05:27 PM   #11
flipit
Registered User
1993 YJ Wrangler 
 
Join Date: Jan 2009
Location: East Bay, CA
Posts: 398
Quote:
Originally Posted by jsawduste View Post
If you have a trailer then simply load the jeep up and ratchet off the frame to the trailer tie downs.

While trailering that is how I tie my junk down. Chain and chain binders compressing the suspension creating a tight secure package. Rather then just the axles leaving the jeep to bounce uncontrollably.
Oh, that's a good one, I don't have a trailer yet, I'm thinking about building one, I've been reading up on the laws and stuff, could be fun. But I think I can find a suitable sub for that, thanks!

posted this on my crap phone
__________________
Project #1- http://www.jeepforum.com/forum/f12/5-0-yj-right-way-1799609/
flipit is offline   Reply With Quote Quick reply to this message
Unread 01-06-2014, 08:22 PM   #12
yjcrawlr
Registered User
1990 YJ Wrangler 
 
Join Date: Jan 2008
Location: Southern Oklahoma
Posts: 1,795
Quote:
Originally Posted by jsawduste View Post
I`ve done this a number of times.

Nothing wrong with using the wider ratchet straps for cycling the suspension. A bit of planning where your going to place the strap and remember the kinetic energy stored when tightened down.
I've done it is well. This is why I have said I don't recommend it! Lol. It isn't a good way to cycle the suspension or measure much of anything other than gas tank skid clearance. I would find a way to take Anticanman up on his offer or just find a good flexer. I have experience a broken brake line on a crawler I built in my youth because I didn't properly cycle the suspension. I was using a cherry picker and a jack that time.
__________________
90 YJ 102 in wb stretch, SOA, dana 60, 14 bolt welded,4.56s, 37in Parnelli jones dirt grips, currie twin stick dana 300, york oba, tractor link traction bar, full custom armor,poison spyder tube fenders, 95Cherokee High Output 4.0
2014 JKU, modified Rubicon Rails, RC stubby with warn 8000m, 2" leveling springs and OME trim spacers, Superchips Flashcal, Spidertrax wheel spacers, rubi shocks, and Lots more mods soon!!!
yjcrawlr is offline   Reply With Quote Quick reply to this message
Unread 01-06-2014, 08:29 PM   #13
bgredjeep
Registered User
1987 YJ Wrangler 
 
Join Date: May 2005
Location: Augusta, GA
Posts: 1,800
That was the most confusing and complex way to ask how to measure for shocks. Lol

The cherry picker option is a good one I've seen used before if you can't drive the jeep anywhere to flex it.
bgredjeep is offline   Reply With Quote Quick reply to this message
Unread 01-06-2014, 09:01 PM   #14
flipit
Registered User
1993 YJ Wrangler 
 
Join Date: Jan 2009
Location: East Bay, CA
Posts: 398
Quote:
Originally Posted by yjcrawlr View Post
I've done it is well. This is why I have said I don't recommend it! Lol. It isn't a good way to cycle the suspension or measure much of anything other than gas tank skid clearance. I would find a way to take Anticanman up on his offer or just find a good flexer. I have experience a broken brake line on a crawler I built in my youth because I didn't properly cycle the suspension. I was using a cherry picker and a jack that time.
well, If everyones done it then I definitely gotta see how crazy it is!
I figure It'll be good for gas tank clearance definitely,
maybe other things too, I'll have to see

Quote:
Originally Posted by bgredjeep View Post
That was the most confusing and complex way to ask how to measure for shocks. Lol

The cherry picker option is a good one I've seen used before if you can't drive the jeep anywhere to flex it.
I was hoping to not just ask how to measure for shocks, I knew how to do the flex part, I was curious about the rear pumpkin compression,
and was hoping to kind of see some banter about the different options,
while first of course shooting at my own half-cracked epiphanies.

I've seen quite a few guys ask about shocks or brakes and the ole how to,
so I was shooting for a catch all thread.
and since we hit ratchet strapping trailers, and the regular flex routes,
I'd say we got most of the possibilities.
__________________
Project #1- http://www.jeepforum.com/forum/f12/5-0-yj-right-way-1799609/
flipit is offline   Reply With Quote Quick reply to this message
Unread 01-06-2014, 09:19 PM   #15
Dre40
Senior Member
 
Dre40's Avatar
1992 YJ Wrangler 
 
Join Date: Oct 2010
Location: Ellenton, FL, Florida
Posts: 636
I have used a set of springs that only have the main spring in it to flex it and it worked pretty well.
Dre40 is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Thread Tools






Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.