This is topic 9 inch rear in forum Tech Talk at Northern California Ford Owners  .


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Posted by SlowAss01 (Member # 1848) on :
 
I was wondering if anyone knew a donor vehicle i can get a 9 inch rear out of that will fit on my 01 gt. I've heard they bolt right in no problem, and I know theyre way more durable than an 8.8. How much hp can they hold without hardened axles?
 
Posted by 2000BlackGT (Member # 283) on :
 
what do you need a 9" for? I see that you have longtubes and 3.73s, i dont think that should be snapping the 8.8?

[ December 11, 2002, 05:39 PM: Message edited by: 2000BlackGT ]
 
Posted by Pro50Eric (Member # 2065) on :
 
that 8.8 rear you have can handle about 500+rwhp. Why fork out the money for a 9 inch??
 
Posted by SlowAss01 (Member # 1848) on :
 
I dont want it now, but in the future i wouldnt mind. Just want to get info and later down the road when i need it then ill put one in.
 
Posted by 2000BlackGT (Member # 283) on :
 
quote:
Originally posted by SlowAss01:
I dont want it now, but in the future i wouldnt mind. Just want to get info and later down the road when i need it then ill put one in.
Jeff S has an 8.8 with 600+ RWHP and harold has 623+ RWHP with an 8.8. you think you will be pushing more than that?
 
Posted by racercosmo (Member # 1864) on :
 
The 8.8 is pretty durable. I believe it's better than a 9". 8.8 has: much bigger pinion shaft, less weight, uses less hp to turn, and it's already in your car. We have had very good luck running 8.8s in high horsepower cars, a few of them over 500 rwhp. A 9" has the advantage of unlimited gear ratios and it's pretty easy to change gears, but most people don't do a gear swap enough to consider that as a factor.

There is no 9" housing that would bolt right in, you will have to get one from Currie or Moser, or you can find an old housing at a wrecking yard and have it cut for size and the brackets welded on.
 
Posted by SlowAss01 (Member # 1848) on :
 
I was just wondering if it would swap in because someone had told me its a direct swap and i thought maybe it was possible to get one from a junkyard or something and swap it in instead of shelling out all the cash for hardedned axles and a new posi.
 
Posted by Tri-Bar (Member # 2191) on :
 
A nine is not a direct swap. You will have to have one made. The 8.8 is lighter nad can handle a lot of power. I would stick with it.If you really need a 9' call Currie, They will build one for you.
 
Posted by TOPnotch (Member # 1340) on :
 
How durable are 8.8 in stock form? I have a 93 cobra R rear end/ w 3.55 U think I can run slicks on it and be safe? I will hopefully have 300 rwhp
 
Posted by Tri-Bar (Member # 2191) on :
 
I would put a T/A cover on it just to be sure, but other than that I see no problem, How much HP ?
 
Posted by Tri-Bar (Member # 2191) on :
 
sorry, saw that 300rwhp. it should be fine with the cover.
 
Posted by SIR Paint Job (Member # 1708) on :
 
quote:
Originally posted by TOPnotch:
How durable are 8.8 in stock form? I have a 93 cobra R rear end/ w 3.55 U think I can run slicks on it and be safe? I will hopefully have 300 rwhp
when you put some slicks on it i'll race you with my DR [Big Grin]
 
Posted by Quick 88LX (Member # 1950) on :
 
If anything you could go for 9 inch ends and be cool.
 




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