Looking for 2nd gen 4.6 Rear Diff

N

Newbie

New member
Hi there,

Does anybody have a source for a second gen 4.6 rear end? I know they used to make them, but have not for some time now. Anybody using one to clutter their garage???

I know all the fast guys use the 5.12 but I'd like to try going DOWN from my current 4.88.

Steve
 
Originally posted by Newbie@Nov 24 2005, 06:29 AM
Hi there,

Does anybody have a source for a second gen 4.6 rear end?  I know they used to make them, but have not for some time now.  Anybody using one to clutter their garage???

I know all the fast guys use the 5.12 but I'd like to try going DOWN from my current 4.88.

Steve
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Not sure if the 4.6 is still available but you should be able to get a 4.44 still.
 
ISC has ONE, and it may be the last one around. He thinks it will cost $2500. Sounds a little steep for an experiment, what do you think?

I was hoping there would be some laying around in storage somewhere.

Steve
 
The only reason I would go down from a 4.88 would be to develop a dedicated enduro car...or to develop a car as a ONE track pony.

Otherwise, you are giving up speed.

AB
 
Originally posted by Andy Bettencourt@Nov 25 2005, 01:10 PM
The only reason I would go down from a 4.88 would be to develop a dedicated enduro car...or to develop a car as a ONE track pony.

Otherwise, you are giving up speed.

AB
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Agreed, even then I would opt for the cheaper 4.44 than can be found in miata's at your local junk yard. :D
 
Originally posted by hare_ITC@Dec 8 2005, 11:39 AM
Agreed, even then I would opt for the cheaper 4.44 than can be found in miata's at your local junk yard.  :D
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Miatas came with a 4.10 or 4.30. And many of the 4.30 gears were in the smaller diff that won't work in an RX-7.
 
I've got the 4.6 in my car (Kip's old car). My last Mazda had the 5:12 and it's definetly faster. If I wasn't moving into stock cars I'd buy a 5:12 and have my buds at Flatout pop it in.

Cheers,
 
Does that mean you're selling the RX-7 to another person who may have a 5.12 put in and is looking to get rid of the obsolete 4.6??? :rolleyes:
 
I wish I had a buyer! Too many friggin 2nd gens over on the classifieds section. I might just keep the sled and have my SPO stock car too! That way I can show up at key races to aggrevate my old ITS buds.

I might consider a swap for a good 5:12...


Cheers,


PS - Andy, you gotta put some good contraversial stuff up so we have some entertainment in the off-season here - the site's a little quiet!
 
Hey Ben
Now you have the idea!!! It'll be fun to have another former ITS driver to show up with to annoy the regulars :happy204:
Just Kidding Guys :P

John Costello

P.S. He's right there are too many for sale!!!! I need more garage space and the red and white rocket takes up too much space!!!!!!
 
Originally posted by benspeed@Dec 9 2005, 10:55 AM
I've got the 4.6 in my car (Kip's old car). My last Mazda had the 5:12 and it's definetly faster. If I wasn't moving into stock cars I'd buy a 5:12 and have my buds at Flatout pop it in.

Cheers,
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Mike used the 4.6 in Kip's old car specifically at Sebring and possibly at other tracks. I don't think he used it at Daytona. The idea was eliminate the need for 5th gear, and with the 4.6 and a 225/50-15 tire, he was able to do that.

While I don't think that the 4.6 is a better all-around gear than the 5.12, it may be better at specific tracks.
 
Originally posted by JeffYoung@Dec 9 2005, 09:44 PM
A 5.12? Wow. What kind of RPM do you guys pull?
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Up to 9K. Not much power over 8K though. Not much torque anywhere.
With 225/45-15 tires 8K in 4th gear is 107 MPH. 5th gear speed depends on which transmission you've got.
 
Originally posted by Chris Wire@Dec 9 2005, 10:54 PM
Mike used the 4.6 in Kip's old car specifically at Sebring and possibly at other tracks.  I don't think he used it at Daytona.  The idea was eliminate the need for 5th gear, and with the 4.6 and a 225/50-15 tire, he was able to do that.

While I don't think that the 4.6 is a better all-around gear than the 5.12, it may be better at specific tracks.
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You are correct sir! I never have to pull 5th in this car, but at the short tracks like LRP or NHIS I'm at a disadvantage.

A 5:12 with the GTU fifth gear is the setup to have. Even at the fast tracks like the Glen or Pocono it's faster. You do row the gears alot though and I also think that the high rev 2nd to 3rd shift must be done with a moments hesitation to let the tranny catch up or you can blow your trans easy (done it twice).
 
Originally posted by benspeed@Dec 12 2005, 10:32 AM
You are correct sir! I never have to pull 5th in this car, but at the short tracks like LRP or NHIS I'm at a disadvantage.

A 5:12 with the GTU fifth gear is the setup to have. Even at the fast tracks like the Glen or Pocono it's faster. You do row the gears alot though and I also think that the high rev 2nd to 3rd shift must be done with a moments hesitation to let the tranny catch up or you can blow your trans easy (done it twice).
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With the 5.12 do you have corners that are clearly 2nd gear? Since I got mine this past season, I've been learning all new shift points, and although there a few corners that are quite tempting, I'm currently thinking they're all faster with 3rd gear.
 
Originally posted by Eagle7@Dec 12 2005, 05:35 PM
With the 5.12 do you have corners that are clearly 2nd gear? Since I got mine this past season, I've been learning all new shift points, and although there a few corners that are quite tempting, I'm currently thinking they're all faster with 3rd gear.
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There are only two corners that I do in second with either the 5:12 or the 4.6 - devils elbow at Pocono and turn three going up the hill at NHIS. These are very low speed corners and must be done in second or you get pulled big time. It puts a whipping on your tranny. The fraction of a second you hesitate before jamming it in third will help prolong your trans. I had a bad habbit of shoving it in third and just ignoring the grind. An expensive habbit until I started being very gentle and precise with my shifting.
 
Steve, let's stick with Blackhawk Farm for talking. Using your 4.88 what gear do you use through T3 & going to 4 & on the front straight & the straight before T7.

What times do you turn at the Farm with your 4.88 & whatever size tires ?
 
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