JBA upper control arms hitting Spring

[Ultarnr75]

Have a 2017 4runner with JBA A-Arms, 5100 Bilstiens and ToyTec coils.

My question is, when i have my car jacked up, should my A Arm be contacting the coil at full drop?

I installed everything myself, got Toyota front end Alignment and rides well with no knocking noise over bumps.

When i jacked my car up and suspension is at full drop, A Arm touches the coil.


Is this normal?

 

[SR5Bart]

No issue on mine. I got the JBAs paired up with an OME suspension

 

[Narat_524]

You might need to spin the spring until the UCA lands in the space between coils when the axle is at full droop.

I wish that step to check clearance was included in the lift instructions. It's a lot easier to correct at installation than it is to correct when everything is buttoned up.

Narat

 

[ayeyothisiskyle]

As mentioned, make sure the spring is set correctly. Also worth mentioning, did you install the UCAs on the correct side?

 

[Ultarnr75]

Thanks for the reply guys.

The spring is fully seated in the grooved perch on the shock body on the Bilsteins 5100


The JBA UCAs are on the correct side. I'm fairly sure because the brake line bolted in the proper location on the Aarms for both sides.

Tonight ill take the tires off and jack it up take pictures, that might help stop an issue.

Thanks all.

 

[Ultarnr75]

As mentioned, make sure the spring is set correctly. Also worth mentioning, did you install the UCAs on the correct side?

Finally got time to take photos of my setup before and after i jacked it up.

My driver side hits the coil and left side side is a hair away from hitting the coil but i stopped jacking once i hit on the Driver side.

I check to make sure my spring was fully seatedin the spring perch, and the JBA were installed on the correct side.


Are these springs to wide? They are the 521600 from Toytec.

Photos are of driver side: Sorry not sure to change orientation.

 

[borfoo3]

UCA's should clear your suspension throughout the whole travel range.. including full droop.

When I installed my KING extended travel suspension on the OEM UCAs I had coil contact at full droop.

After the JBA UCA it clears without issue at all.

You should also reach out to JBA on this. I'm sure they'll help

 

[Ultarnr75]

UCA's should clear your suspension throughout the whole travel range.. including full droop.

When I installed my KING extended travel suspension on the OEM UCAs I had coil contact at full droop.

After the JBA UCA it clears without issue at all.

You should also reach out to JBA on this. I'm sure they'll help

how wide in inches are your king shocks... with the coil-over included?
I feel like these springs are too wide for the setup. I dont know anyone with these Toytec Coils and JBA arms. Most have Icon or Kings and i have gotten no response from JBA.

 

[S4ndTrooper]

I installed my JBAs a month ago and I'm getting bad rub on the drivers side rear wheel well and frame. It only rubs turn hard left in reverse.
The drivers side tire is 1 inch closer to the wheelwell. Taking it back in Monday to have them look at it again.
265/70/17 wheels and tires
Demello bumper
Bilstein 6112 coilovers with heavy upgraded springs for the bumper
have the 6112s two notches higher on the drivers side to compensate for the driver lean from the battery and fuel tank.

 

[dmcminn]

UCA's should clear your suspension throughout the whole travel range.. including full droop.

When I installed my KING extended travel suspension on the OEM UCAs I had coil contact at full droop.

After the JBA UCA it clears without issue at all.

You should also reach out to JBA on this. I'm sure they'll help

I agree with reaching out to JBA - it wouldn't hurt to reach out to Toytech as well.

 

[Mudballz]

If you change direction I will make you an offer
Mike

 

[Crikeymike]

Seems like this could be an issue with long struts when used with JBA arms. I saw a photo today of some Dobinsons 574 front struts and the JBA's making contact with the coil at full extension. Those are a little longer than 5100's as well, so there was more contact than was mentioned in this thread already.
[MENTION=207965]Ultarnr75[/MENTION] any update?

 

[daytonaviolet]

I’m shocked to hear that an aftermarket UCA would hit the springs. Here are some comparison next to Oem. I wonder if I should return mine since I have not yet installed ?

 

[daytonaviolet]

I just forwarded this thread to Marlin from JBA. Perhaps he can comment.

 

[SnowYeti]

Looks like the OD of the JBAs bushing housing is larger. Might be a better comparison to run the bolt through them next to each other.

I researched them a lot and never found this issue

 

[Charlievee]

So, what did the op come up with? His last update was May 2019. Thread has been dead since Dec 2019. Kind of makes one hate cliff hangers. Would be good to know if they are the "stock" or high caster arms also.

 

[daytonaviolet]

Looks like the OD of the JBAs bushing housing is larger. Might be a better comparison to run the bolt through them next to each other.

I researched them a lot and never found this issue

I can take a pic. What do you mean by “run the bolt through them” ?

 

[daytonaviolet]

Here’s the response I got from JBA.


Fernando,
Jack your vehicle up without JBA UCAs, have your suspension hang at full drupe, If you have a lift kit on your vehicle now your factory UCAs will hit the factory style springs. (Fox, King & Icon coilovers have smaller diameter springs and at full drupe there is no contact.)

Out test vehicle: with the factory style spring on a Bilstein 5100, spring perch on the highest setting, the factory UCAs vs JBA UCAs, you will get 3/4" to 1" more down travel before hitting the spring with the JBA UCAs vs the Factory UCAs.

Our Goal is more down travel just with replacing the UCAs, and giving a great front end alignment with the UCAs!

The envelope for the suspension is only so big, there is a give and take to make it all work.

We moved our guest out farther to give more spring clearance, more spring clearance but less tire clearance with oversize tires on factory wheels. We recommend this wheel and tire combo for that reason, LT285/70R17 (32.7" x 11.2") tire on 17 x 9 wheel, -12mm offset (4.50" backspace)

So plan your build!
To eliminate spring contact use a racing style coilover and small diameter spring.

I hope this makes sense and answers your question.


Thanks
Marlin Gehman
K.M. Gehman Inc.
DBA: JBA Offroad
704 Forman Road
Souderton Pa 18964
Ph: 855-533-7437
Fax: 215-822-7735

 

[comtn4x4]

Here’s the response I got from JBA.


Fernando,
Jack your vehicle up without JBA UCAs, have your suspension hang at full drupe, If you have a lift kit on your vehicle now your factory UCAs will hit the factory style springs. (Fox, King & Icon coilovers have smaller diameter springs and at full drupe there is no contact.)

Out test vehicle: with the factory style spring on a Bilstein 5100, spring perch on the highest setting, the factory UCAs vs JBA UCAs, you will get 3/4" to 1" more down travel before hitting the spring with the JBA UCAs vs the Factory UCAs.

Our Goal is more down travel just with replacing the UCAs, and giving a great front end alignment with the UCAs!

The envelope for the suspension is only so big, there is a give and take to make it all work.

We moved our guest out farther to give more spring clearance, more spring clearance but less tire clearance with oversize tires on factory wheels. We recommend this wheel and tire combo for that reason, LT285/70R17 (32.7" x 11.2") tire on 17 x 9 wheel, -12mm offset (4.50" backspace)

So plan your build!
To eliminate spring contact use a racing style coilover and small diameter spring.

I hope this makes sense and answers your question.


Thanks
Marlin Gehman
K.M. Gehman Inc.
DBA: JBA Offroad
704 Forman Road
Souderton Pa 18964
Ph: 855-533-7437
Fax: 215-822-7735

Seems like a lot of constraints to run these UCA's. I'm not sure I see the benefit of running JBA's over the other aftermarket brands.
Is this information clearly indicated on their website?

 

[daytonaviolet]

Seems like a lot of constraints to run these UCA's. I'm not sure I see the benefit of running JBA's over the other aftermarket brands.
Is this information clearly indicated on their website?

Yes there are constraints posted on there site.