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  1. Pinion nut pre-load

    You should take a look here: (2) Inside the "Super 8.8" Rear End | 2015+ S550 Mustang Forum (GT, EcoBoost, GT350, GT500, Bullitt, Mach 1) - Mustang6G.com
  2. BASE GT350 NON-R & NON-Magna-ride SPRING's P/N#'s? HELP!

    My 2016 GT350 Non MagnaRide Front Springs: Spring Diameter: .555 Spring Rate: 194 Front Springs PN: FR3Z-5310-K
  3. BASE GT350 NON-R & NON-Magna-ride SPRING's P/N#'s? HELP!

    My 2016 GT350 Non-MagnaRide Rear Springs Spring Diameter: .750 Spring Rate: 914 Left Rear PN: FR3Z-5560-S Right Rear PN: FR3Z-5560-N Of course the RR spring on the GT350 is wound in the opposite direction. To Fit GT350 rear springs on S550 mustangs, it takes (2) LR springs from a GT350
  4. BASE GT350 NON-R & NON-Magna-ride SPRING's P/N#'s? HELP!

    The 2015 - 2016 GT350’s without Track Pack, and without tech package we’re referred to as Base Model. These base models do not have MagnaRide. I have one !
  5. Is 3.55 to 3.73 worth the cost?

    I guess I am considered a gear guy, I have done 20-30 of the Super 8.8 rebuilds and swaps. From the sound of what @geep81 is looking for, I'm not sure the 3.73 would give him what he wants. 18 points would barely make a noticeable difference. If a final decision of 3.73 is made, then definitely...
  6. Question about diff temp sensor on 3.55 to 3.15 pumpkin swap???

    T The Temp sensor does Not go all the way into the fluid. It's brass end bottoms out against the aluminum. Ford Manual says it's a (One time use), but I have heard of others swapping them over. Part Number for New Sensor: FORD OEM = 9L8Z-6G004-E Standard Ignition = TS653
  7. Inside the "Super 8.8" Rear End

    Alex, I was told that Ford & Ford Performance does not mark their Pinion gears in regard to pinion depth or shims. On OEM Ford Pinions Gears I have not seen them marked. Some aftermarket R&P manufactures do mark the pinion, but it is usually on the face of the pinion head. Here is a YUKON...
  8. Inside the "Super 8.8" Rear End

    Only (2) That I know of: 1. F3TZ-4214-A 2. JR3Z-4214-A Both may have the same tension
  9. Trans temp sensor?

    The sensor that ford uses is similar, if not the same, as the one they use for rear-end temp. It doesn’t go into the fluid itself. The copper end on the sensor just makes contact with the aluminum at the bottom of the hole (if that makes sense) usually there is a connector in the factory wiring...
  10. 2016 GT350 Track Pack Sync 3 conversion exhaust toggle

    You will need Forscan. I have 2016 (Base), that I upgraded to Sync3 w/8" screen I was able to activate exhaust mode toggle, (See Below) Here is how to do it: GT350 FORScan Tweaks | Page 46 | 2015+ S550 Mustang Forum (GT, EcoBoost, GT350, GT500, Bullitt, Mach 1) - Mustang6G.com
  11. Differential Flanges - Any Experts?

    Removing the outer pinion bearing race (from the front) would be nearly impossible with the pinion shaft still there. It's hard enough to punch it out from the rear. And it would take longer than diving in the deep end of the pool. To replace the crush sleeve, you will need to remove rear cover...
  12. Tremec 3160 swap in a 18 GT base

    If anyone is interested in a 2016 OEM GT350 Tremec TR3160 (Mint <4,000 mi), OEM Shifter, and OEM Driveshaft please PM me. John Vallo Venice, Florida
  13. 2023 GT/CS Auto Rear Gear Ratio?

    Raise/Jack-Up your car, Look for a white sticker on your diff unit Like This: 3L 15, or 3L 55
  14. What have you guys done to Dress Up the Engine Compartment ? ? ? ?

    I designed & made all the under hood vinyl graphics. You can PM me if you would like to discuss some for youself.
  15. 3.15 Gear Ratio -Why it is different-

    Some consideration may depend on what preload spring/springs you use. I thought I read about you were thinking of using or had used Belleville springs for preload.? I don't have a recommended good setting, Go with your best guess.
  16. Inside the "Super 8.8" Rear End

    This is very interesting, Applaud your creativity! This is like the shit I used to do when I was racing... I was reading several of your posts in the SCCA CAM-C Thread Seems like you are Firm on the 3.15 When they say there is no Torsen, for the 3.15 have you looked at this...
  17. 3.15 Gear Ratio -Why it is different-

    I will do my best to explain in detail why the 3.15 ratio setup isn’t compatible or doesn’t interchange with the other higher numerical gear ratio’s (i.e., 3.31, 3.55, 3.73 etc.), setups in the “Super 8.8” rear-end. -What’s Different? - First of all, the -Bare Housing- in the “Super 8.8”, (the...
  18. Inside the "Super 8.8" Rear End

    are you aware of any TBR differences between the models across the mustang range i.e. does a 350r or a 500 CFTP have a different TBR when compared to say a PP1 ? Not aware of any differences in the Torque Bias's I have heard rumors of differences, but not verified. I have not had any experience...
  19. Winters Quick Change Diff

    After 40 years of Racing Stock Cars, I can say I ran a quick change rear in about 35 of those seasons. Fixed, Rebuilt, Straightened many. As I recall you could order these rears with either a 4.11 R&P, or a 4.86 R&P. Of course the final gear ratio depended on the 2 spur gears you loaded in from...
  20. What is this connector?

    Well the Ford Engineer did say it was there for safety precaution in case of a wreck. It does secure the outer hood layer to the inner hood layer. Could this be the purpose ? Keeping the two layers of the hood from separating in case of front end collision ?





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