Mine has 23k… not sure what the noise is. I feel Iike mine is coming from the trans tbh. But maybe not.

Fords 8.8 rear end with 3.73 gears are known to make noise at those speeds.

I always thought the whine in my car was the rear end until the MT82 died. The whine disappeared with the Tremec. It i still quiet with the 4:10's and Tru Trac.

Here's why I'm leaning towards the DS. The noise doesn't change with gear changes, it does it in 4th, 5th and sixth. It's the same if the clutch is engaged or not. Purely speed related. I can hear it faintly around 50 by 65 it's in full song and then it's gone at 80. It seems like it's right in the middle of the car too. I'm also getting a little clunkiness at low speeds in and out of first and second if I'm not real smooth, which is tough with the stock clutch, which is another reason for me to do away with the carrier bearing design.
The car is lowered, so I'm aware of the possible interference issues. Everything I've read says a 3.5" should have no rub.
Am I on the right track here? TIA

TMSBOSS said:

Fords 8.8 rear end with 3.73 gears are known to make noise at those speeds.

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Torsens too?
Btw, I love your signature under your avatar. I can relate!

Skidmarc said:

Here's why I'm leaning towards the DS. The noise doesn't change with gear changes, it does it in 4th, 5th and sixth. It's the same if the clutch is engaged or not. Purely speed related. I can hear it faintly around 50 by 65 it's in full song and then it's gone at 80. It seems like it's right in the middle of the car too. I'm also getting a little clunkiness at low speeds in and out of first and second if I'm not real smooth, which is tough with the stock clutch, which is another reason for me to do away with the carrier bearing design.
The car is lowered, so I'm aware of the possible interference issues. Everything I've read says a 3.5" should have no rub.
Am I on the right track here? TIA

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I'm going to bust this up into chunks as I reply. Here is MY experience with my BOSS 302.

• Speed related - check.
• 60/65 it's full song, comes on quick right around 60.
• Fades out around 75 and isn't noticeable by 80.
• My trans has always been clunky at low speeds/low RPM shifts (say <2500RPM), ESPECIALLY when cold. Takes a while for the gearbox to get heat into it. I'm running MOTUL MULTI DCTF, but it was the same with OE fluid. MGW X-SPEC did not really change this characteristic.

Re: mods/changes:

• The driveshaft will add some NVH I think, though it gets rid of the clunk yes.
• Moving to a McLeod RST will definitely add a lot of NVH. Avoid this if you're sensitive to it. It's not as forgiving as the OE clutch in modulation either, but holy bejesus does it grab.
• Adding an aftermarket shifter that mounts solid like the MGW X SPEC will also increase NVH.
• Correct - 3.5" no rub from what I've read. I'm running a Stifflers Driveshaft Safety Loop that mounts up by the trans/mounts to the trans.

All of these things help with driveability but add NVH unfortunately. Tradeoffs.