Notices
JK Off-Road 101 Bulletin board forum regarding topics such as general off-roading tips, tricks, techniques and equipment usage such as winching and vehicle recovery information.

Using 3.5 inch parts for 2.5 inch parts

Thread Tools
 
Old 01-13-2021, 09:57 AM
  #1  
JK Newbie
Thread Starter
 
Josh8986's Avatar
 
Join Date: Jan 2021
Location: Virginia
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
Default Using 3.5 inch parts for 2.5 inch parts

Hi, I have a 2012 2 Door JK that's all stock and im looking to put a lift on it. I have acquired 35 inch tires and a 4 inch lift that's missing some key essentials for smooth operation. Im not sure what the best route to go is because I don't want to be too high with just 35s and I don't wanna spend another $1,000 or more on parts if I don't haft too. I use my jeep as a daily driver but I want it to be an off road jeep as well. When I say off road I mean trails with mud and some rocky terrain to climb through. I live around the Fredericksburg VA so its not super hilly but will be moving to Harrisonburg in the next year. I got a great deal for my 4 inch lift but idk if its worth spending the extra money on the others parts for the risk of how high I will be off the ground. In the lift I have now I have: 4-3.5 lift kit inch spring coils, 4 bilstein shocks, upper and lower adjustable synergy control arms, teraflex front and rear track bars with the mounting bracket for the back and 4 35 inch tires. I wanna know if it would be worth it to buy smaller springs and just use what I have and make it a 2.5 inch lift or buy the remaining parts and make it a 4 inch lift. Ive read if I do that I need a tie rod and drag link which are about $800, bigger sway bar links, drive shaft extension, exhausted extension, break line extension and I need to regear as well. What am I missing if I go for 4 inches or will the 2.5 inch be better economically and safety?
Old 01-13-2021, 10:31 AM
  #2  
JK Jedi
FJOTM Winner
 
resharp001's Avatar
 
Join Date: Jun 2013
Location: Willow Park, TX
Posts: 10,591
Received 1,827 Likes on 1,597 Posts
Default

That is a hecka lotta lift for a 2dr, and the higher you go the more things you really need to address. You haven't even accounted for drive shafts at that height. The control arms would be useful to have regardless of different springs or not, as would track bars and brackets. If you went with lower springs you might need to do different sway bar links. I'd say you'd have less aggravations staying lower, more like 2.5". When you go higher you're just raising that COG which isn't going to benefit you off road. Go as high as you need to accommodate the tire you want to use.
Old 01-13-2021, 10:31 AM
  #3  
Super Moderator
FJOTM Winner
 
karls10jk's Avatar
 
Join Date: Dec 2010
Location: Knoxville
Posts: 5,642
Received 483 Likes on 440 Posts
Default

4" is a bad idea. Around Harrisonburg, you won't need it at all. I got by with 2.5" and 35's with no sweat. Going 4" will cost you quite a bit more in parts and frustration. Go with a properly designed 2.5" kit and ditch your current parts to someone else that can use them.
Old 01-13-2021, 11:02 AM
  #4  
JK Newbie
Thread Starter
 
Josh8986's Avatar
 
Join Date: Jan 2021
Location: Virginia
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
Default

that's what I was thinking do you think I could use what I have now and ditch the springs for smaller ones and I already figured I have to buy sway bar links
Old 01-13-2021, 11:56 AM
  #5  
Super Moderator
FJOTM Winner
 
karls10jk's Avatar
 
Join Date: Dec 2010
Location: Knoxville
Posts: 5,642
Received 483 Likes on 440 Posts
Default

Looking at your list above- no, ditch them all. The shocks will be too long and control arms aren't necessary at 2.5"....but could bring value for resale of the old parts.

Buy quality. Trying to "make it work" will cost you more in the long run. I've been there. Do it right.
Old 01-13-2021, 12:12 PM
  #6  
JK Jedi
FJOTM Winner
 
resharp001's Avatar
 
Join Date: Jun 2013
Location: Willow Park, TX
Posts: 10,591
Received 1,827 Likes on 1,597 Posts
Default

Can you tell us what you paid? Also, are the Synergy arms the old style poly bushings or their newer DDM bushings? I don't necessarily disagree with Karl, but adjustable arms are nice to have if the build changes, the adjustable trackbars will work with any lift, and the rear raised bracket is needed regardless. The shocks would have to go with the springs as they'd likely be too long. IDK, I guess a lot depends on what your price was and what the arms have in em. It's just my 2c....or at least another perspective. If you have the jack to sell it and buy a brand new metalcloak 2.5" lift and upgrade the steering components, that is 100% the way to go.
Old 01-13-2021, 01:40 PM
  #7  
JK Newbie
Thread Starter
 
Josh8986's Avatar
 
Join Date: Jan 2021
Location: Virginia
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
Default

I paid 1600 for all the parts with the tires and rims together. I think im going to go with a 2.5 inch lift then, I was very concerned about being so high up on a 2 door and this has reassured me. As great of a metal cloak lift sounds its not in my budget. The shocks are adjustable and I will be using those when I convert to the new lift.
Old 01-14-2021, 07:17 PM
  #8  
JK Newbie
 
eldertec's Avatar
 
Join Date: Aug 2020
Location: Baltimore, Maryland
Posts: 31
Likes: 0
Received 5 Likes on 5 Posts
Default

2011 stock 2 door jk.
Went with the 3.5" Rough Country suspension lift kit, everything you need.
$529
And some friends to help you.
Went with 33"s because of the 3.21 gears.
Runs great, manual.
Attached Thumbnails Click image for larger version

Name:	photo324.jpg
Views:	92
Size:	1.05 MB
ID:	677701  
Old 01-14-2021, 07:30 PM
  #9  
JK Newbie
 
eldertec's Avatar
 
Join Date: Aug 2020
Location: Baltimore, Maryland
Posts: 31
Likes: 0
Received 5 Likes on 5 Posts
Default

You could easily fit the 35's, and the gears would be fine.
Attached Thumbnails Click image for larger version

Name:	photo331.jpg
Views:	71
Size:	646.8 KB
ID:	677702  
Old 01-14-2021, 07:32 PM
  #10  
JK Newbie
 
eldertec's Avatar
 
Join Date: Aug 2020
Location: Baltimore, Maryland
Posts: 31
Likes: 0
Received 5 Likes on 5 Posts
Default

And I went to Peters Mil No problem, jus sayin...


Quick Reply: Using 3.5 inch parts for 2.5 inch parts



All times are GMT -8. The time now is 12:37 PM.