Started with a vibration - 2003-04 Mach 1 Registry Owners Club

mikeracing · 05-17-2018, 08:27 PM

So started with a vibration that the car has always had since i have owned it. Never really bothered me since it was only 120+mph. This winter i decided to play with it. The pinion angle was off so changed upper bushings.

Didnt help, thought maybe the alumium drive shaft was off balance put the factory shaft on... nope.

Decided to check the rear end. Pulled the cover and ooohhhh **** the spider gears are broke. Tear down and cleaning only damage spider gears. Waiting on parts

My 2 worries were a bent shaft in the trans but dosent appear to be. Ordered a slip yoke bushing since that was what went in my lasy mustang with similar vibration. Just assumed it was something else.

All in all glad i found the broken gears just a pain in the *** on my back. I miss having a lift

BONESTOCK · 05-18-2018, 10:16 AM

Dang! Pic of the gears?

ab_mach1 · 05-18-2018, 12:17 PM

Dang, that's crazy! Were they just holding on enough to function, just vibration? Lol, yeah I'd miss a lift too. Unfortunately, I've never been able to work with one. Thought about renting space at our local 'do it yourself' garage, but they want too much money.

TKat13 · 05-18-2018, 01:56 PM

This post has my attention, was the vibration on deceleration only or all the time above 120?

mikeracing · 05-18-2018, 04:26 PM

All time

311-420 · 05-18-2018, 06:15 PM

Right there with you. Just busted mine too. Sounds like rocks rolling around in the diff when turning at slow speeds. Built this rear not even 10k miles ago...no track time, no hard launches, nothing more than a nitto 555r.

Time to find something better than a ford racing diff..

05-17-2018, 08:27 PM	#1
mikeracing MECHANIC Join Date: Jun 2012 Location: Morgantown, WV Posts: 916	Started with a vibration So started with a vibration that the car has always had since i have owned it. Never really bothered me since it was only 120+mph. This winter i decided to play with it. The pinion angle was off so changed upper bushings. Didnt help, thought maybe the alumium drive shaft was off balance put the factory shaft on... nope. Decided to check the rear end. Pulled the cover and ooohhhh ** the spider gears are broke. Tear down and cleaning only damage spider gears. Waiting on parts My 2 worries were a bent shaft in the trans but dosent appear to be. Ordered a slip yoke bushing since that was what went in my lasy mustang with similar vibration. Just assumed it was something else. All in all glad i found the broken gears just a pain in the * on my back. I miss having a lift

05-18-2018, 10:16 AM	#2
BONESTOCK Registered User Join Date: Jul 2004 Location: Raleigh , NC Posts: 2,093	Re: Started with a vibration Dang! Pic of the gears? __________________ 2004 Torch Red Procharged Mach 1

05-18-2018, 12:17 PM	#3
ab_mach1 Lorraine's driver Join Date: Apr 2012 Location: Indianapolis, IN Posts: 2,442	Re: Started with a vibration Dang, that's crazy! Were they just holding on enough to function, just vibration? Lol, yeah I'd miss a lift too. Unfortunately, I've never been able to work with one. Thought about renting space at our local 'do it yourself' garage, but they want too much money. __________________ Instagram: @azurblumach1 SCT X3 with LaSota Racing tune Borla Stingers w/JBA off road H pipe MGW short shifter w/comfort handle Eibach Sportlines w/Koni STR.T's and Maximum Motorsports CC plates

05-18-2018, 01:56 PM	#4
TKat13 Mach-T Join Date: Jun 2004 Location: DFW Posts: 2,865	Re: Started with a vibration This post has my attention, was the vibration on deceleration only or all the time above 120? __________________ Darrell Black '04 Mach 1 Track Times (bone-stock w/drs):60 ft - 1.90 \| 1/8 - 8.67 (100 shot,E85,4:10s,Street tire):60 ft - 1.67 \| 1/8 - 7.88 New build - 750rwhp; not track tested (yet) Mods: Build Log Paint&Body Tuned by Manny @ HPP

05-18-2018, 04:26 PM	#5
mikeracing MECHANIC Join Date: Jun 2012 Location: Morgantown, WV Posts: 916	Re: Started with a vibration All time

05-18-2018, 06:15 PM	#6
311-420 Can't be bridled Join Date: Sep 2007 Location: Texas Posts: 7,006	Re: Started with a vibration Right there with you. Just busted mine too. Sounds like rocks rolling around in the diff when turning at slow speeds. Built this rear not even 10k miles ago...no track time, no hard launches, nothing more than a nitto 555r. Time to find something better than a ford racing diff.. __________________ 2004 Mach 1 #6956 5spd w/IUP Eaton swap, longtubes, built 3.73 SRA 452hp/409tq dynojet🏁

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