Notices
Modified JK Tech Tech related bulletin board forum regarding subjects such as suspension, tires & wheels, steering, bumpers, skid plates, drive train, cages, on-board air and other useful modifications that will help improve the performance and protection of your Jeep JK Wrangler (Rubicon, Sahara, Unlimited and X) on the trail.

PLEASE DO NOT START SHOW & TELL TYPE THREADS IN THIS FORUM

replace TF 2.5 coils with RK 3.5?

Thread Tools
 
Old 04-04-2013 | 08:43 PM
  #1  
notsoricer's Avatar
Thread Starter
JK Super Freak
 
Joined: Oct 2011
Posts: 1,384
Likes: 0
From: North Jersey
Default replace TF 2.5 coils with RK 3.5?

Hey guys. I currently have the TF 2.5 coil lift. I added the rear RK coil wedges to correct the rear springs so they dont hit my rear track back and that added 1/2" so I then added a 1/2 TF spacer up front for compensation.

What I want to do is go just a little taller to make up for my RR XHD with winch and my Smitty knock-off rear bumper/carrier. I feel like I lost some height over time.

I could a) add 1" spacer up front (replace current 1/2") and 1/2" spacer in the rear. that would bring me up 1/2" over my current height.

or b) add RK 3.5" progressive coil up front and add appropriate spacer in rear to level out.

i do off road and get some flexing in so I dont want anything to pop out at full flex. so far my front spacer has stayed in place..

will the 3.5 RK coil add a lot of height over what I have now? Is the ride quality similar to TF?

Thanks guys!
Old 04-05-2013 | 08:34 AM
  #2  
notsoricer's Avatar
Thread Starter
JK Super Freak
 
Joined: Oct 2011
Posts: 1,384
Likes: 0
From: North Jersey
Default

Bump. Any insight?
Old 04-05-2013 | 09:13 AM
  #3  
3min3m2's Avatar
JK Enthusiast
 
Joined: Jul 2012
Posts: 192
Likes: 0
From: United States
Default

With my limited experience, I would like to think you can do this. But I have very limited experience. I am interested in possibly doing this.
Old 04-05-2013 | 09:21 AM
  #4  
Hinrichs's Avatar
JK Enthusiast
 
Joined: Aug 2012
Posts: 378
Likes: 0
From: Wyomissing, pa
Default

not much help here either, but if i decide to go taller, im looking into the evo plush ride coils after hearing good reviews.
Old 04-05-2013 | 09:37 AM
  #5  
mpkelley20's Avatar
JK Super Freak
 
Joined: Oct 2009
Posts: 1,381
Likes: 1
From: East Bridgewater, MA
Default

People use spacers all the time to adjust for either sagging coils or for leveling purposes when heavy bumpers have been added.

As for mixing and matching coils....Hmm..I wouldn't do that. I'm sure others would disagree but the TF coils are completely different from RK coils. I've run both systems (TF 2.5" before my current lift) and the ride was noticeably different between the two lifts. Mixing coils...no clue on result but I wouldn't do it.

The 3.5" RK coil will net you about 4" of total lift even after you account for the heavy bumper. Leaving the 2.5" TF coil in the rear means running a minimum of 1" spacer or more to offset. Add in the fact that TF coils sometimes tend to sag over time, you may need to add even a bigger spacer.

Plus, what are you doing about shocks? Are your shocks long enough for the added lift? And then there are driveshaft issues, caster issues, steering issues.....list goes on once you start getting over 3" of lift. If it was me, I'd do it right and get a complete lift. If money is an issue, hold off and just add some spacers to get back the lift you lost.
Old 04-05-2013 | 10:15 AM
  #6  
13-JKU-Freedom's Avatar
JK Newbie
 
Joined: Jan 2013
Posts: 41
Likes: 0
From: Salt lake city, UT
Default

I have the RK 3.5 coils and they ride smooth. My rears sit about an inch lower than the front. I'm going to add a 1/2 or maybe a 1" spacer to level it out
Old 04-07-2013 | 02:52 AM
  #7  
notsoricer's Avatar
Thread Starter
JK Super Freak
 
Joined: Oct 2011
Posts: 1,384
Likes: 0
From: North Jersey
Default

Thanks guys. I'm just going to go with the spacers for now. Coils would be great but atm I can't afford the guessing game and possibility of new ds.
Old 04-07-2013 | 06:57 AM
  #8  
JK Inspired's Avatar
JK Freak
 
Joined: Jan 2013
Posts: 643
Likes: 0
From: Westfield
Default

JKS ACOS- on point!
Old 04-08-2013 | 08:29 AM
  #9  
Rock Krawler Suspension's Avatar
Former Vendor
 
Joined: Jul 2008
Posts: 1,644
Likes: 13
From: Albany New York
Default

Originally Posted by mpkelley20
People use spacers all the time to adjust for either sagging coils or for leveling purposes when heavy bumpers have been added.

As for mixing and matching coils....Hmm..I wouldn't do that. I'm sure others would disagree but the TF coils are completely different from RK coils. I've run both systems (TF 2.5" before my current lift) and the ride was noticeably different between the two lifts. Mixing coils...no clue on result but I wouldn't do it.

The 3.5" RK coil will net you about 4" of total lift even after you account for the heavy bumper. Leaving the 2.5" TF coil in the rear means running a minimum of 1" spacer or more to offset. Add in the fact that TF coils sometimes tend to sag over time, you may need to add even a bigger spacer.

Plus, what are you doing about shocks? Are your shocks long enough for the added lift? And then there are driveshaft issues, caster issues, steering issues.....list goes on once you start getting over 3" of lift. If it was me, I'd do it right and get a complete lift. If money is an issue, hold off and just add some spacers to get back the lift you lost.
This by far is the safest bet! Good luck with your continued build.

We would put our coils as far as ride quality up there with any set of coils on the market as long as they are paired with a good set of shocks, tires and wheels! We get no complaints about the ride quality unless someone is on 20" or 22" wheels with 50 psi in them! LOL.

RK
Old 04-08-2013 | 08:45 AM
  #10  
jkbarnett's Avatar
JK Enthusiast
 
Joined: Nov 2011
Posts: 128
Likes: 0
From: Bishop Ca.
Default

Are the RK rear coils narrower in overall diameter than the TF rear coils ?




All times are GMT -8. The time now is 04:30 AM.