Pinion Snubber not needed with Torque Arm... Why? - Ford Mustang Forums : Corral.net Mustang Forum
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post #1 of 10 Old 03-10-2018, 10:56 PM Thread Starter
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Smile Pinion Snubber not needed with Torque Arm... Why?

I don't understand why a TA changes the need. It is more or less just a bump stop right? Can anyone enlighten me?

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High-Rate / Torque-arm Rear Springs, pair

(bullet point #3)


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post #2 of 10 Old 03-10-2018, 11:14 PM
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Pinion snubber limits upward rotation of the pinion under acceleration. By stopping the rotation of the axle it transfers the weight of the car to the rear tires.

Torque arm does the same through a different mechanism.

Keep in mind this is a gross over simplification.

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post #3 of 10 Old 03-10-2018, 11:33 PM Thread Starter
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Thanks, that makes sense.

I was thinking it was more like a bump stop... but is more of an axle wrap stop I take it. The TA having a ton more leverage negates the need for this.

So, with it gone, what physically stops the axle at full compression with a Torque Arm? Coil bind? I can't think of anything else.

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post #4 of 10 Old 03-10-2018, 11:56 PM
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The two body mounted rubber bump stops. As stated above the pinion snubber was to limit rotational forces, the bump stops limit upward travel of the rear axle in a vertical plane.
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post #5 of 10 Old 03-11-2018, 12:19 AM
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post #6 of 10 Old 03-11-2018, 10:29 PM
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The pinion snubber is only there to control the axle housing rotation due to excessive compliance in the control arm bushings. With the TA bolted to the axle housing, it must follow a path dictated by the geometry of the TA.

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post #7 of 10 Old 03-12-2018, 09:12 AM Thread Starter
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Thanks, I understand. Seems like a silly question now.

Hard to believe the axle wraps up that much.

MM TA/PHB is due to be installed soon (whenever spring finally shows up) and I was just looking over the parts list making sure I did not forget any of the smaller bits to get it swapped over. I am basically starting from "Level 0" (which includes 5 lug swapping it too) and am having to slay this dragon in chunks.

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post #8 of 10 Old 03-13-2018, 03:38 PM
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Welp.. sucks for me. I don't have those anymore.

How does this work in regards to an SN? I know they don't have those bumpstops and only the pinion snubber.
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post #9 of 10 Old 03-13-2018, 03:59 PM
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It's exactly the same on an SN95 chassis. The only difference is that the bumpstops are hidden on the shock shafts under the dust boot instead of on the frame rails.

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post #10 of 10 Old 03-13-2018, 08:24 PM
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I thought the MM T/A instructions said to remove the two frame bump-stops for more lowering clearance. I did that and have no frame interference. But I am running sn95 Bils on the 86.

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