If I were you I would seriously consider installing the reinforced housing because if those bearing caps break like what happened to my unit, they will ricochet around and destroy everything inside. If my tech. still has the parts i'll post pics next week. The LSD, ring,pinion, bearings, crush sleeve, flange, shim set and etc......were all garbage. Oh I forgot , both halves of the housing were shattered thanks to a 7000rpm clutch drop on a sticky track. Total price for the overhaul $4000.00 and I got parts at wholesale.

 

since they are the 4.77's I should have to drop it at 7k I wouldn't think. that's what I was dropping it at before the gears and that worked fine. If I had to guess I would think 5-6k would be sufficient. Either way I won't do it untill at least 1

 

since they are the 4.77's I should have to drop it at 7k I wouldn't think. that's what I was dropping it at before the gears and that worked fine. If I had to guess I would think 5-6k would be sufficient. Either way I won't do it untill at least 1000-1500 miles are on the new gears. As for the reinforced diff, that is way outta my price range right now. That will be something that goes in when the supercharger goes in (about 5-6 years).

 

Make sure you change your fluid again at around this point.

 

will I have to change it every 1500 or is this just because they are new gears. thanks for the heads up!!!

 

[QUOTE]Originally posted by Gr8nbed11
[B]will I have to change it every 1500 or is this just because they are new gears.

 

Given that 4.77 gears are good to 99 mph( in 4th gear) and that probably equates to about 14 seconds flat give or take a few tenths. Wouldn't it make more sense to just bounce it off the rev limiter a couple of times to complete the 1/4 mile rather than a shift into 5th gear?

 

From this:
http://www.geocities.com/fkflee/
I get about 103 mph. How did you come up with 14 seconds? This would depend upon the track, the altitude, the driver, the tires, etc. I mean, even a stock car can do the 1/4 in around 14. And if the driver is a very fast shifter, the time taken to do one more shift is more than outweighed by the advantages of the extra acceleration of the 4.77's. I think even with the extra shift, we should still see low 13's, but since noone has done it, this is only an educated guess.

 

xviper,

Where did you get 103 mph from? If that's the case I don't think a shift to 5th gear in the 1/4 would be necessary. You believe low 13's are attainable with only 4.77 's in an otherwise bone stock S2000? Maybe under perfect conditions. Not too many people have run in the high 13's with bone stock cars. I think most of us mortals are seeing numbers between 14.1 and 14.5 most of the time. I'm just theorizing that a swap to a 4.77 final drive would have your average driver that used to run 14.1-14.5 probably acheiving something in the 13.7 - 14.0 range. Assuming he or she didn't have to make the extra shift into 5th which would probably cost them .3-.5 seconds nearly negating the gains they got from the gear swap in the first place. If your figure of 103 mph in 4th gear is accurate I definately don't think a shift into 5th would be necessary.

 

If you go to that link I posted and plug in 4.77 into the final drive ratio and plug in 9000 rpm into the top line, then go to 4th gear, you'll see that they calculate it out to be 103.
You are right about what the "average" driver can do. However, if you check out "Sev", in his sig, he has (or used to) 13.8 on a stock car. I've also seen other postings here from otherwise stock cars (pass. seat removed) doing a best of 13.7.
"ItalianBuckwheat" has shown in his experiments before and after 4.44 gears, with a clutch slip start (do dumping), he was able to best his stock 0-60 times by just under 1/2 second. This can be extrapolated to the 1/4 mile. With 4.77's, I'm making an educated guess, based on this information, of sub 13.5's.
Granted, we've only seen mid 13's with a S/C'd car and low 13's with a S/C'd car with 4.44's (fltfrshr? in Florida).
I must re-iterate that the driver CANNOT shift like a granny.