Why 2 parts #'s on Mach 1 alternators?? - 2003-04 Mach 1 Registry Owners Club

not a gt · 12-17-2014, 11:18 PM

Question, if you go to Advance and look up alternators, it shows one for a

Auto trans

http://shop.advanceautoparts.com/p/t...999%7CL3*15587

'''and one for manual trans

http://shop.advanceautoparts.com/p/t...999%7CL3*15587

What is the difference other than price?? (I did notice the the auto trans one said" Supplied With Clutch or Decoupler Pulley".

Would this one work for a manual trans Mach? Thanks guys!!

http://www.ebay.com/itm/231394700718...84.m1555.l2649

Flash88 · 12-18-2014, 04:24 AM

i had the same problem at oreillys. the chick got me one from a 2001 cobra and been using it since.

iamkevin7 · 12-18-2014, 06:29 AM

Resist the urge to buy from AA . I am fortunate to have a good local rebuild shop who is usually 1/2 to 1/3 the price of new on big truck alternators

Mach828 · 12-18-2014, 09:45 AM

The auto and manuals used a different amp alternator. I'm not entirely sure what the reasoning is behind it. I'd get the higher amp one regardless, some people even run aftermarket alternators rated at 170+ amps, to reduce voltage drop issues which eventually cause a lean condition.

I wonder if the 03+ crown vic p71 alternators would work on our cars. After some research I guess they switched to having a clutch type alternator to eliminate premature failures the older 130 amp models were having. The bullitt/mach alternators are also apparently thinner to provide clearance for the intake manifold, but since the centri's change the alternator location I wonder if there would still be clearance issues.

I just swapped the belt in my p71 and the stock alternator is 200amps. Ebay has reman and used ones for under $150. They both rotate the same direction, I'd image it would work.

66gam · 12-20-2014, 12:57 PM

The pulley is different and it doesn't stick out far enough. I bought a alternator and it turned out it was for a auto.

12-17-2014, 11:18 PM	#1
not a gt Registered User Join Date: Mar 2007 Location: Waaayy out in the country,leave your GPS at home! Posts: 4,825	Why 2 parts #'s on Mach 1 alternators?? Question, if you go to Advance and look up alternators, it shows one for a Auto trans http://shop.advanceautoparts.com/p/t...999%7CL315587 '''and one for manual trans* http://shop.advanceautoparts.com/p/t...999%7CL315587 What is the difference other than price?? (I did notice the the auto trans one said" Supplied With Clutch or Decoupler Pulley". Would this one work for a manual trans Mach? Thanks guys!! http://www.ebay.com/itm/231394700718...84.m1555.l2649 __________________ 2003 DSG Mach 1-03 Cobra Term/T56 swap: 2.3L Whipple,3.37 Upper,4 lb.lower, ID 1000 injectors,LCD cooling mod,Billetflow idlers,200A Alt,oil cooler delete with MMR adapter plate,MM oil filter kit,FrozenBoost Heat Exchanger Flowtech L.T., Maganaflow O/R X with Magnapacks, FRRP D.S.,T-56 with 26 spline input shaft and anti venom mod with reverse lockout box, FR steel flywheel,Spec Stage 3+,Moser 31 spline axles,FR 3.73 gear Tuned by B.Kurgan* 601Hp/558/Tq

12-18-2014, 04:24 AM	#2
Flash88 Registered User Join Date: Jul 2011 Location: jacksonville Posts: 664	Re: Why 2 parts #'s on Mach 1 alternators?? i had the same problem at oreillys. the chick got me one from a 2001 cobra and been using it since. __________________ ___________________________ 70mm single turbo.

12-18-2014, 06:29 AM	#3
iamkevin7 Registered User Join Date: Feb 2014 Location: Monroe NC Posts: 120	Re: Why 2 parts #'s on Mach 1 alternators?? Resist the urge to buy from AA . I am fortunate to have a good local rebuild shop who is usually 1/2 to 1/3 the price of new on big truck alternators

12-18-2014, 09:45 AM	#4
Mach828 Dark Knight Join Date: Nov 2009 Location: Albuquerque, NM Posts: 5,759	Re: Why 2 parts #'s on Mach 1 alternators?? The auto and manuals used a different amp alternator. I'm not entirely sure what the reasoning is behind it. I'd get the higher amp one regardless, some people even run aftermarket alternators rated at 170+ amps, to reduce voltage drop issues which eventually cause a lean condition. I wonder if the 03+ crown vic p71 alternators would work on our cars. After some research I guess they switched to having a clutch type alternator to eliminate premature failures the older 130 amp models were having. The bullitt/mach alternators are also apparently thinner to provide clearance for the intake manifold, but since the centri's change the alternator location I wonder if there would still be clearance issues. I just swapped the belt in my p71 and the stock alternator is 200amps. Ebay has reman and used ones for under $150. They both rotate the same direction, I'd image it would work. __________________ Vortech V2 S-trim, E85, A2A Treadstone, Comp cams, built engine, full exhaust, built rear, built 4r70, more mods. Tuned by me with SCT Advantage Last edited by Mach828; 12-18-2014 at 10:07 AM.

12-20-2014, 12:57 PM	#5
66gam Registered User Join Date: Apr 2011 Location: jacksonville,nc Posts: 170	Re: Why 2 parts #'s on Mach 1 alternators?? The pulley is different and it doesn't stick out far enough. I bought a alternator and it turned out it was for a auto.

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