Installation Instructions for Timbren Suspension System on a 2012 Nissan Frontier Pro4X 4x4 Off Road

Question

Question:

Hi, I have a Nissan Frontier 2012 Pro4x 4x4. What do I have to do to install these on this truck? Thank you

asked by: Dan

0

Expert Reply:

To install the Timbren Rear Suspension Enhancement System, # TTORTUN4L, on your 2012 Nissan Frontier Pro4x 4x4 you will need to safely raise the vehicle to allow the axle to hang freely, then loosen the axle u-bolts and remove the OEM rubber bump stop.

Next, install the lower bracket from the Timbren kit where the OEM bump stop was.

Finally, tighten the U-bolts and safely lower the vehicle.

I have attached installation instructions for you to review.

expert reply by: Robert G

0

click to enlarge

Rick S.

1/29/2013

Bob,I have over 10K Installed miles driving with the Timbrens installed on my Pro4X which you have pictured hooked up to my Jayco X17X. The product has worked as advertised and so far I am a happy customer. Unloaded the truck acts stock, loaded you know the Timbrens are working,Let me know if I can help with providing more pictures or information regarding this product and my Nissan Pro4X.ThanksRick

Patrick B.

2/8/2013

Thanks for the feedback, glad the Timbrens are working well for you.

William

9/10/2026

I am seeing that most people suggest to replace the u bolts. If I replace the u bolts and nuts does the procedure change?

Jesse M.

9/11/2026

@William Yea most axle U-bolts are intended to be torqued only once so it isn't recommended to re-use them. If you do replace them the procedure listed above doesn't really change you just swap the bolts out instead of keeping the old ones.

Answer 1

I went out and pulled both the Timbren kit part #TTORTUN4 and #TTORTUN4L from our warehouse to measure them for you and found that they both sit exactly 3-3/4 inches tall.

view full answer...

Answer 2

Timbren recommends a 1" gap when the Timbren Rear Suspension Enhancement System #TTORTUN4L is installed. The overall height of this kit is 4.6" so the distance between your leaf spring and the point of contact where the old bump stop hits…

view full answer...

Answer 3

The difference between the two SumoSprings Solos kits for your 2013 Toyota Tundra is the weight capacity for either. The part #SSR-610-47 provides 1,500 lbs of suspension support and the #SSR-610-54 has 2,800 lbs of capacity. Since you said you…

view full answer...

Answer 4

Hey Albert, thanks for reaching out. I see you already have an order in for the Timbrens, but I still wanted to reply to your question. Yes, you can use Timbrens, or other similar suspension enhancement products in conjunction with a weight…

view full answer...

Answer 5

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

view full answer...

Answer 6

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

view full answer...

Answer 7

Hey Doug! The Firestone Ride-Rite Air Helper Springs #F35FV are the right kit for your 2026 Ford F-350 FX4 dually. However, you will need to measure to be sure it fits. The distance from the top of your rear axle to the top of the jounce bump stop…

view full answer...

Answer 8

Yes, it will work. You'll just need to cut the Lance 6-pin connector out and rewire it into the etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector item #e99011. Here are the individual functions of that Lance 6-pin:…

view full answer...

Answer 9

Hey Jeff, I would strongly recommend the SumoSpring kit part #SS96EV for your 2025 Nissan Frontier. This will give you the support you are looking for without causing the ride quality to be overly harsh which the Timbrens are known to do. Install is…

view full answer...

Answer 10

Hey Jonathon thank you so much for all of that additional information! To haul your bikes behind your class C Sprinter motorhome, while flat towing your Mini, I recommend the Hollywood Racks RV Rider Bike Rack item #HLY64FR and the Roadmaster Dual…

view full answer...

Answer 11

Hey Melanie. The reason you can't find a replacement for your GE ARC15AACBL2 15,000 btu air conditioner is because they phased them out. In 2025 all RV AC systems had to change over to a new coolant called R32. This was a EPA mandated decision.…

view full answer...

Answer 12

For your 2024 Nissan Frontier I recommend the Redarc Tow-Pro Liberty Brake Controller #RED24FR. I like the Liberty because it is simple, reliable, and looks great in any vehicle. The main unit installs behind the dash, so only the control knob will…

view full answer...

Installation Instructions for Timbren Suspension System on a 2012 Nissan Frontier Pro4X 4x4 Off Road

Product Page this Question was Asked From

Featured Help Information

Instructions

Continue Researching