Wondering About A Gear Swap In The LS?

02LSE96LSC91SE84TC said:
Right, but to really clarify Mustangs are really solid axle 8.8s so a IRS 8.8 diff is needed, meaning Cobra or as I used and as far as I know the same as Cobra, MarkVIII diff.


With good fab skills between me and ILLS, and his good welding skills, I remember being $1500 in or so. Without the skills or means to do the needed fabbing.....cost is hard to say. Finding someone to take it at a shop on with little more than posts on here about mine that it works well will be hard.


Having the only 4.10ed LS around.......priceless.



As far as I know anyway.
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Have you gone back to the track yet Mr. Mastercard??
 
Good to hear, I dont plan on making it to the track again this year, whole front end of my LS is apart and I have no wheels at the moment. Im really hoping you pull a 14.23 or better so that I have a need to go back.
 
02LSE96LSC91SE84TC said:
4.30s vs. 4.10s will only be a few hundred rpm different on the highway, 4.56s a few more.


I can't imagine needing a shift to 5th with 4.56s. That would be a very good reason not to do them. But I'm FAR from red line with 4.10s, can't see 4.56s pushing it that much up.
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I was going by someone else's math. I want to say it was a conversation with Sully, but I could very well be wrong. So, for the sake of argument, let's not throw him under the bus.

I do think a 3400 stall would put you at redline faster than the stock converter.
 
pektel said:
I was going by someone else's math. I want to say it was a conversation with Sully, but I could very well be wrong. So, for the sake of argument, let's not throw him under the bus.

I do think a 3400 stall would put you at redline faster than the stock converter.
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When you stall the converter up the engine holds at that rpm until the rest of the drivetrain catches up to its speed and then continues on up to redline, technically it should reach that point faster because your accelerating faster but I think your thinking that the converter itself is allowing the engine to rev faster? Correct me if Im wrong, and yea it probably was Sully, where is that guy anyways, I lost his number.. I think a 3400rpm stall might be over kill with bolt ons.
 
I'm thinking exactly how you are explaining it. Technically, I would think it would redline faster because you are accelerating faster.

Why the sudden change of heart on stall speed? Last I heard, you wanted more than the 3K...
 
Found a complete Mark VIII rear end today for $350. Let the 410 gear games begin and FINALLY something good about having a Gen 1. :)
 
Torrie just confirmed having a correct tune for the gearing change. We have a go for a Spring launch Houston!!! :)
 
marcredd said:
Found a complete Mark VIII rear end today for $350. Let the 410 gear games begin and FINALLY something good about having a Gen 1. :)
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Thats way to high of a price. All you need is the pumkin. That should be 100 dollar range roughly. I just checked carparts.com and there are like 10 on there for 100 dollars. I have my stock one sitting in my garage also.
 
Need to change it all on the LS. Ask Quik....and see his post toward the beginning of this thread.
 
right. all you need is the pumpkin. if you are going to 4.10s and a trac lok, (don't go to 4.10s without one) you will pull out the stock 3.08/3.27 and open diff anyway.
ergo, you just need the housing.
 
I smell a pissing contest coming and I will stay out of it. LOL.
 
marcredd said:
Going to the full 8.8 swap. Appreciate the input.
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I could be wrong but I thought to do this swap you need Gen 1 LS "axles" to mate to the lincoln Mark 8 pumpkin. You stated you found complete mark 8 rearend. To me that means the whole drop out rearend subframe. If you only need the pumpkin why buy whole rear? I will never be doing this swap so just what I thought I read.

And of course if you buy mark8 pumpkin you will have to buy gears and trac-lock.
 
But did I ever say I only had one vehicle that I need these parts for? LOL.
 
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