jhelms

iTrader: (2)

A friend of mine is looking to do a few bolt ons for his Z28 LS1 M6 and wants the biggest bang for the buck - no internal stuff.

He has planned intake, exhaust and wants gears. He's had 4.10's before - but we want to go a little bigger, is there a set of 4.30's or 4.56's that will fit in the stock rear?

When we check out our online vendors most of them only carry up to the 4.10's.

ROB'S SS

they dont make a 4.30 gear set for the 10 bolt. but they do make a 4.56. i have them siting right next to me waiting to be installed. check out www.nationaldrivetrain.com. excellent prices and a warranty. picked mine up for $150 and the eaton posi for $335.

Pro Stock John

iTrader: (34)

IMO the 4.56 gears will only last 2 months of beating on them, the teeth are soooo tiny.

I had a friend with 4.56's and they were neat, he was able to roll off a lite in 3rd gear too.

jhelms

iTrader: (2)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Pro Stock John:
<strong> IMO the 4.56 gears will only last 2 months of beating on them, the teeth are soooo tiny.
</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Even with no drag strip launches, no drag radials and 320rwhp?

ROB'S SS - thanks for the link, let me know how your install goes, why did you also get the Eaton posi?

thanks!

ROB'S SS

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Pro Stock John:
<strong> IMO the 4.56 gears will only last 2 months of beating on them, the teeth are soooo tiny.
</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Even with an auto?

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted be jhelms:
<strong>ROB'S SS - thanks for the link, let me know how your install goes, why did you also get the Eaton posi?

thanks! </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">i got the eaton because my factory posi was shot. my car was a 6-speed , and now its an auto and im just doing a built up 10 bolt to see how long it lasts with an auto. the gears go in on thursday and illlet you know.

Pro Stock John

iTrader: (34)

Auto, no drag radials, and 320rwhp?

Not as bad...

Futral

iTrader: (1)

John, GM gears is the source for 4.30 gears,they came in Isuzu trucks with factory 7.5" rearends. If you need a set,just call.

ROB'S SS

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Futral Motorsports:
<strong> John, GM gears is the source for 4.30 gears,they came in Isuzu trucks with factory 7.5" rearends. If you need a set,just call. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">now thats interesting. thanks for the info <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> i searched all over the place for 4.30's before i decided to put a cam in and couldnt find any.

jhelms

iTrader: (2)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Futral Motorsports:
<strong> John, GM gears is the source for 4.30 gears,they came in Isuzu trucks with factory 7.5" rearends. If you need a set,just call. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Cool, this is for the guy that called you about the A4 to M6 swap. He found a sweet M6 and picked it up after talking to you.

He may call you if he decides on these gears, thanks!

jhelms

iTrader: (2)

We are trying to get in touch with people that are actually running 4.30's or 4.56's in a stock rear to find out some stuff about longevity - anyone currently running these that can give us some feedback?

Jason99T/A

iTrader: (21)

I know of one car currently running 4.56 gears in a 7.5". It is a M6 car that has a Futral Motorsport's 388 All-bore motor. He drives around on street tires most of the time, but has used some ET streets in the past without any problems.

Another LT1 car around here is/was using the 4.30s with pretty good results.

Again, they are not very strong at all. But, You may get lucky. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />