moffetts
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- Nov 30, 2015
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- San Mateo CA
- Vehicle(s)
- Black Whippled 2015 GT PP
What part number is the gt350 rear bearing? I didn’t think they were different.
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I did change ratios but I didn't go the way most folks would think. I bought the car used from Carmax because it had all the options packages I wanted. Up to that point, I hadn't seen one configured this way and believe me, I've looked. Anyway, I found a web site that I could order a copy of the original window sticker from and I discovered the car also had the optional 3:55 final drive gears. That was the one option I would not have gone for left to my own devices so after a while, I started looking at options to return the car to the factory stock 3:31 gears.. I looked into buying the ring gear and pinion with bearings and shim sets and having someone do the gear swap but that would be pushing $600 to $800 at least. Then I found a factory differential assembly with the 3:31 gears that came off a 2017 GT. on Ebay. They said it came off a car that was being modded for track competition and only had about 1k miles on it. They wanted $430 for it with free shipping so I took a chance. I've been very pleased with the results. The difference in performance is exactly as you'd expect. It doesn't lay me back in the seat under full throttle acceleration like it did before but it's still no slouch. I didn't buy the car with any intent of racing but rather making road trips at every opportunity and I prefer the more laid back rpms while cruising. On the plus side, it gained 7 to 8 mph on the top end of each gear. Whether it's actually quicker or not, it feels like you get a little more out of each gear and I don't mind that either.Also forgot to ask - Did you change gear ratios? If so, what was the effect on performance?
Both 2017 MY:
GT 350: FR3Z-1104-E pricing about 455 US $ each
GT : FR3Z-1104-G pricing about 115 US $ each
just counter checked numbers and pricing at levittownfordparts.com
(however, the timken part HA590577 that comes from Ford as stock part is sold for under 39 US$ at some US Webshops)
And YES the bearings ARE different.
GT: double ball bearing, closed and sealed unit with hub and studs
GT 350: double conical roller bearing, closed and sealed with hub and studs
Since my drivers side rear wheel bearing just ate it in the past few weeks, I was looking into this hoping it was true that the GT350/350R had a more robust rear bearing to handle the track conditions those cars were made for.It really looks like the R has unique hubs. I’m mobile right now so it’s hard to be sure. Check this: https://www.mustang6g.com/forums/threads/gt305r-wheel-studs.86042/#post-1918806
Something is wrong with the ABS/Wheel Speed sensor you removed to do the hub change. Possibly it's not plugged in, or not installed properly.I just had to replace my passenger side rear bearing, after installing it my ABS & Traction control lights came on. Oddly, after a few days of light driving, my engine started revving a lot louder than before.
Visually everything looks fine on the bearing install. Anyone else have something odd like this happen?
what is the correct torque?Relatively common. I suspect because of improper torque on the axle nut. Before I started tracking my car regularly, I checked the torque on mine (car should be cold, metal shouldn't be hot) and both sides were far off from spec.