How Can I Decrease The Gap Between Timbrens And Axle?

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Question:

I just installed the FRTT350J on my 20225 F350 Dually. I used the spacers as instructed, but the gap between the rubber and the axle is 2 1/8inch . The paperwork says 1/2inch to 1 1/2. Please advise.

asked by: Charles W

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FRTT350J on 20225 F350 Dually
(click to enlarge)

Expert Reply:

Hello Charles, thanks for reaching out. Yes a 2-1/8" gap is too much. Sounds like you are going to need additional 1" spacers. For that you can use the following:

- Timbren 1" Spacer For Raised Frame Vehicles - 3/8" Bushing # A25723-90AH00

Please note that using additional spacers may mean the included bolts are not long enough. In this case you will need to source longer bolts at a local hardware store.

expert reply by: Jesse M

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A25723-90AH00
(click to enlarge)

Charles W.

7/3/2025

Thanks for the information. I’ve already ordered the additional spacers. My F350 is “stock” so you should have a way to let customers know that the additional spacers will be needed so they don’t have to install them twice.

Reply

Jesse M.

7/3/2025

@CharlesW That would be the first I have heard of a truck with stock suspension needing additional spacers beyond what is included with the kit. Timbren tests these and custom tailors each kit for the stock suspension. I see you put the word "stock" in quotation marks. Do you have some kind of factory package that adds a lift?

Reply

Charles W.

7/3/2025

@JesseM not that I'm aware of. It does show 14,000 GVW in the options but other than that, it's a regular F350 DRW 4x4.

Reply

Jesse M.

7/7/2025

@CharlesW Interesting. Perhaps this is something unique to the new model year. Will definitely keep this in mind going forward next time I am dealing with one of these trucks.

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See All (12) Replies to Charles W. ∨

Answer 1

When people are looking for suspension enhancement for their trucks like your 2023 Ford F-350 I generally don't like to recommend Timbrens unless the vehicle is going to be basically towing heavy all of the time as they are known to make the ride…

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Answer 2

Yes, the Timbren kit part #TFR350SDJ that you referenced is correct for your 2022 Ford F-350 dually.

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Answer 3

Hey Tony, based on how the Timbren kit part #TFRTT350J installs I do not see how your overload spring spacer block would interfere with it so this would work for you. Is that block that you have designed to engage the overload springs a little sooner…

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Answer 4

There are two Timbren systems for your 2023 Ford F-350, like you said, with the best definitely being the following part number: - Timbren Suspension Enhancement System #TFR350SDJ The reason for that is the #TFR350SDJ is designed for standard pickups…

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Answer 5

Hey Dustin, welcome back! The Timbren SES #TFRSDJ will offer you more support over the severe service kit #TFRTT350J. Are you experiencing squat with your current Timbrens? If you are then it would be worth upgrading. If you really aren't, then…

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Answer 6

We have two Timbren rear suspension kits that fit your 2020 Ford F-250 we have the standard duty #TFRTT350J which has a spring height of 3-9/16 inch and a bracket height of 2-3/8 inches. The severe duty #TFR250SDJ is 3-5/8 inches tall and has the…

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Answer 7

The Timbren TFRTT350J will measure 7" from the top of the bracket to the bottom of the rubber spring/jounce. With you having 8-1/2" of space on your 2022 Ford F-250 Super Duty, you will have a 1-1/2" gap between the bottom of the…

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Answer 8

Hey Kent, thanks for the information. If your 2024 Ford F-350 is a 4WD model, I recommend the SumoSprings Rebel Custom Helper Springs item #SSR-128-40-2. These have a 3,000 lbs leveling capacity and replace your factory bump stops. The springs have a…

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Answer 9

I recommend going with the Timbren Suspension Enhancement System #TFRSDJ for your 2024 Ford F-450 Super Duty because it's designed better for pickup truck-type applications. The other Timbren kit #TFRTT350J is designed more for Severe Service…

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Answer 10

The only Timbren kit that fits your 2024 Ford F-350 Super Duty is the Timbren Suspension Enhancement System #TFR350SDJ rated for 8,600 lbs. Please note these are only designed to help support your OEM suspension, and it won't increase your load…

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Answer 11

Hey Tony, if you are wanting additional suspension support and are concerned about ride quality at all the best solution is the Roadactive Suspension Kit part #RAS3611-SLHD as this is only option that will give the additional support you are looking…

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Answer 12

Hey Cory, Air springs are going to be the best at leveling your F-350 back out once the weight is added but they will most likely affect your unloaded ride quality, even when aired down. That being said, a majority of the unloaded ride quality…

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How Can I Decrease The Gap Between Timbrens And Axle?

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