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#2
01-05-2006, 06:47 PM
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Re: rear diff
a 26 spline 7.5.
__________________
RIP Hypsi - I just want to express I will never be the same after having lost such a good friend. You meant alot to me and I feel I am a better person for having known you. Til the day we meet again my friend you will always be in my heart. Mods: Weight reduction (I don't wear underwear) 
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#3
01-05-2006, 06:53 PM
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While we're on this topic, I have an '89 Trans-Am originally equipped with a 5.7 350 automatic...any idea which diff. is in it? Thanks.
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#4
01-05-2006, 07:15 PM
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Re: rear diff
I would need to know the vin to tell for sure but I would bet on a 28 spline 7.625 (which they call a 7.5). 89 is the year they switched from 26 spline to 28 spline axles.
__________________
RIP Hypsi - I just want to express I will never be the same after having lost such a good friend. You meant alot to me and I feel I am a better person for having known you. Til the day we meet again my friend you will always be in my heart. Mods: Weight reduction (I don't wear underwear)
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#5
01-05-2006, 08:16 PM
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Re: rear diff
limited slip or no?
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#6
01-05-2006, 08:30 PM
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Re: rear diff
Do you leave dual tracks when you take off?. I would think that the 5.7 would have to come with a posi but I am not positive. Thats easy enough to figure out though. Either Power brake it and see if both spin or jack it up and put it in neutral and a healthy posi unit will cause the other wheel to spin when you spin one.
__________________
RIP Hypsi - I just want to express I will never be the same after having lost such a good friend. You meant alot to me and I feel I am a better person for having known you. Til the day we meet again my friend you will always be in my heart. Mods: Weight reduction (I don't wear underwear)
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#7
01-05-2006, 09:26 PM
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yea, I just didn't want to have to resort to that...plus the engine is still out of the car as I am rebuilding it and was just curious. Thanks for the spline info. though.
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#8
01-06-2006, 05:34 PM
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Re: rear diff
thanks for the reply.i recently built and installed a 383 stroker for this car ,im worried if my 10 bolt will hold up to the extra torque.im wanting to replace the rear gear with a 3.73 to make it a little more streetable.any comments or ideas is appreciated
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