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differential

  1. Help Diagnosing Damaged Differential

    Need some help diagnosing my damaged differential. Wanted to see if any experts in here might know what is wrong since I know next to nothing about differentials. Car is a 2015 mustang gt, 6r80 with the 3.15 differential. ~125k miles on diff. Started noticing noise when going from drive to...
  2. Texas 3.31 iron differential

    $250 plus shipping obo Came out of a 2016 GT with 75k miles Includes rebuild kit for bearings and seals. Needs pinion, so likely could work for auto or manual from 15-17.
  3. Texas 3.73 torsen diff from 2015 mt82

    $600 plus shipping obo Came out of My 2015 GT with 50k miles Changed because I'm switching to 3.31 gears. Had no issues with it.
  4. Differential and Rear Subframe Bushings, HELP NEEDED!

    Okay, so I am doing differential and rear subframe bushings because my differential bushings were extremely bad. I went ahead and picked up the bmr bushings for both. So far, I was able to get the rear subframe and differential out with no problem, but getting the bushings out is another...
  5. 2019 Ecoboost Premium Dragging Sound in Rear When Turning At Slow Speeds

    Hey everyone, I have a 2019 Convertible Ecoboost Premium, with around 96k miles. For the last month, each time I take a sharp turn at slow speeds (ex. during parking) I get a dragging sound in the rear, and sometimes there's a little vibration in the steering. I have no issues or sounds when...
  6. Hard clank and power loss when flooring

    2015 mustang gt premium, 6r80, 3.15 diff, bmr drag springs, fbo e85 cam, nitto nt555r2 305/35R19 tire Recently I took my rear seats, passenger seat, and trunk spare tire cover out of the car to see if the weight difference was noticeable. What I did end up noticing is sometimes when flooring...
  7. North Carolina Loaded 3.31 Rear Differential - TractionLOK - Manual

    Loaded 3.31 rear differential for sale - Iron housing. TractionLOK / Clutch pack LSD. Pulled from a 2015 mustang GT manual so this has the 113mm pinion flange. This will only mount up to a driveshaft that has the matching pinion flange (or you can swap pinion flange/driveshafts). Miles: 52k...
  8. 2020-2022 Shelby GT500 differential gear fluid change - how to video!

    In this video, I show the workshop manual and walk through how to change the diff fluid on a 2015-2023 Ford Mustang S550 with a differential cooler.
  9. Roadcourse Willow Spring 2015 PP GT

    Planning to go to streets of willow soon. For those people who track their cars. Any recommendations, regarding engine oil that i should use? Or will stock work just fine? Im going to use Motul RBF 600 for brake fluid. I have a 2015 Mustang GT PP with FP power pack 2, and FP track handling...
  10. ISO. Pinion Seal replacement instructions.

    Looking for instructions , PDF, step-by-step, etc.. about replacing my pinion seal myself. I've done numerous things on my car myself , but for some reason I'm not as confident with this.lol. I've searched numerous threads on here but just cant find the answers I'm looking for.
  11. Michigan 2019 PP Torsen 3.73 differential Loaded Iron like new - PRICE DROP !

    I got this off a 2019 GT PP with only 2k miles on it. I never got around to installing it due to CoVID and other stuff so it's essentially like new Differential Housing Torsen Loaded Iron With 3.73 Gears. Manual flange $600 obo. I'd prefer local pickup
  12. Differential and MT-86 fluid change procedure

    I'm about to change the rear differential and the MT-86 fluid for the first time. Is there any special procedure I should follow or do you just fill both on level ground until the fluid starts dripping back out of the filler hole? I have a performance pack equiped 2017 Mustang Ecoboost. It's an...
  13. Ohio 3.73 Differential (pumpkin) SOLD

    $500.00 plus shipping Shelby takeoff purchase. This is the 3.73 factory diff option on PP. Only a few hundred miles on differential from time of removal for a shelby build. Never installed and only removed from original shipping crate to take photos for sale. It looks and is basically BRAND...
  14. 2015 differential clutch packs on V6 auatomatic?

    2015 V6 automatic with the standard LSD. What clutch pack would I need for a full service job? Would you use the packs from the previous generation 8.8?
  15. Differential Flanges - Any Experts?

    I have a 2015 GT manual with 3.31 ratio and cast iron housing. I purchased a used differential from a 2018 GT manual (verified in person) with 3.55 ratio and cast iron housing. Everything I have found indicates there are only two available flange options from Ford, one for manual and one for...
  16. Rear gear swap effect on quarter mile

    I have an 18 manual with the 3.55 LSD. The instrumented tests of the 2018 Mustangs you find on the web and in the magazines are done with the PP Mustangs that have 3.73 Torsen rears. I want shorter gears like the PP, but even shorter. I'm actually looking at installing the 4.09s since they...
  17. Florida 3.15 Gears / Differential housing

    3.15 gears with Trac-Loc differential, full housing/pumpkin out of my car, 28k miles on it. I have the manual pinion flange with it, but isn't attached (neither is an auto one). Swapped out for a 3.73 housing. Looking for $200 OBO, hoping for a local deal instead of needing to ship but can if...
  18. GT 3.55 loaded diff manual

    Selling my great condition 3.55 ford loaded diff. Came out of my car at 25k miles. Diff oil was changed twice in its life. Reason for sale is I replaced it with a performance pack 3.73 Torsen diff. Only downfall is you need to use your diff cover as I had to use my steel cover on the PP due to...
  19. 3.55 loaded diff Manual

    Selling my great condition 3.55 ford loaded diff. Came out of my car at 25k miles. Diff oil was changed twice in its life. Reason for sale is I replaced it with a performance pack 3.73 Torsen diff. Only downfall is you need to use your diff cover as I had to use my steel cover on the PP due to...
  20. New gears... vibration??

    Hi everyone, first post here. I got new 3.73 FRPP gears installed on my 2017 3.7L. I also had to get a new diff so the new ring and pinion could be installed (stock diff for 3.15 do not fit 3.73s). However, now I get a vibration above 45ish mph. I went back to the shop and ran it on the lift...


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