Drivetrain Swapping A 8.8 Into A 79

Hi guys,

I recently found a 8.8 rear end out of an auto stang that the owner says has 3.27 gears (stock) out back. I plan on swapping this into my car prior to putting in my rebuilt motor because I don't believe that the stock 7.5 will stand up to the output of my new setup. In order to install this correctly I was wondering if the parts that I have links to will be all that I need to pick up.

Rear end installation kit: http://www.americanmuscle.com/moinkit8re.html

Differential Rebuild w/ carbon discs: http://www.americanmuscle.com/ford-88-traclok-kit.html

As a side note it says I'll need a S-Spring for the 28 spline axles but I would imagine that there should be one in there. Whether or not that will need to be replaced I am not sure but if you have any opinion or input feel free to drop it here.

Speedo gear: http://www.americanmuscle.com/speedo-gear-19tooth-manual.html

Gear Oil: http://www.americanmuscle.com/royalpurple-85w140-gearoil.html

Another side note: On the gear oil I assumed that because this will be a daily driver that having a higher viscosity would be better to deal with heat but I may be mistaken. If there is a better route to take give me a heads up.

Thanks guys,
Andrew

7991LXnSHO said:

The rear should be a bolt in. Run whatever Ford calls for fluid viscosity. It is what they want for a daily driver. Use the friction modifier additive.

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You don't think it's worth it to pull out the diff and rebuild it prior to putting it in? And it is necessary to add the friction modifier although the royal purple says they already have it in there?

7991LXnSHO said:

If you think it needs serviced, by all means do it now. If I was tearing into it, the rest of the bearings and seals would be new too. And yes, I would add the modifier anyway. It is cheap compared to tearing it apart again for chattering clutches. And if you are using Purple stuff, I bet you want it done right the first time.

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That is exactly the information I was looking for. Thanks man