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PostPosted: Mon Jun 10, 2019 1:53 am 
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Year and Trim: 3800 1990
What are differences? Only + wire mount?

I have broken alternator on my 1990 and my friend has 1993 trans sport (3.8 v6) alternator but its on miles away so will someone know will that fit?

Same alternator which fits trans sport fits same age bonneville


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PostPosted: Mon Jun 10, 2019 11:49 am 
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Year and Trim: 3800 1990
Its 140a model but im happy to know will it fit or will 105a model on newer models fit.


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PostPosted: Mon Jun 10, 2019 8:50 pm 
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Joined: Wed May 21, 2008 11:47 pm
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Location: Philly
Year and Trim: 95 SLE
It's not looking like it's a direct swap:

Image
Image

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PostPosted: Tue Jun 11, 2019 9:37 am 
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Year and Trim: 3800 1990
95naSTA wrote:
It's not looking like it's a direct swap:

Image
Image


Seems like attachments are reversed, but if those are same size, you just turn alternator another way?

Only problem is, is there enough room for fatter 140a alterntor and is belt routing in same distance. I mean is measure same pulley top to alternatoe case.


Its possible to turn alternator bottom in another side if + wire connection is too low.


I wonder basic 105a newer alternator is easy to fit but bigger 140 :dontknow:


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PostPosted: Tue Jun 11, 2019 10:40 pm 
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Location: Philly
Year and Trim: 95 SLE
Honestly, without trying it, I doubt you'll know for sure one way or another.

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95 SLE... a keeper. 241k miles. Low and Slow.
97 BMW 528i
98 Infiniti vq35'd i30: 13.3@104mph, 30MPG Hwy
02 Jag X-type
07 Infiniti G35s 6MT
07 Ducati Monster S2R 800 with DS1000 swap
05 Suzuki DRZ400S
83 Yamaha IT175K
72 Yamaha DS7: '74 RD250 swap, JL chambers

Info on dropping a 92-99: Here.


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PostPosted: Wed Jun 12, 2019 6:47 am 
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Year and Trim: 2000 Bonniville SSEi L67
you gotta make sure the mount positions are the same take good pictures + measure: you can always make your own bracket for mount.

you can always have your own alternator refurbished.

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PostPosted: Mon Jun 24, 2019 1:34 pm 
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I know I'm late to the party here...

Yes, the 93 alternator will physically fit, but some modifications are needed. In addition to mounting reversed, the orientation of the output stud (as well the angle and tab on the big wire) are different and need to be modified.

I had one on my '89 Lesabre for a while, not bolt in but can be made to work.

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'67 Buick LeSabre - future victim


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PostPosted: Wed Jun 26, 2019 12:25 pm 
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Year and Trim: 3800 1990
I got it and it places fine even + wirr bolt but engine harness is stuck on bottom.


So alternator wont touch smaller bolt hole.

Longer belt or harness with new location will help.


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