A properly set up rear end w 5.71 is plenty strong. I read the artilcle, spoke with Zuk and swapped in a set of 5.71's and am very happy.
And no, this is not on some mall crawler. These are on a 84 Toyota class 7s dezert race truck. I am very hard on this truck yet have no concerns about running over 2' whoops, in 2nd or 3rd gear, with the built 22re (140hp) at 5200 rpm and turning 33" BFG Baja's (extremely heavy tire) on a V6 spool. They have run an entire race season with no issues. And I have friends that get 1 - 2 races out of a set of Ford 9" gears with a simular truck.
However, like the article says you must run a quality gear (ours are Precisoin V6 gears - not GG or a shimmed 4cyl gear). a solid pinion spacer and properly set up the rear diff. This includes torking the snot out of the carrier bearings.
The next time I do the rear end I will have the gears cryo's - to prevent the minute scuffing that does occur due to the hard racing use.
Bluecoyote--- Replying to your 6 month old post
......I wish I had offered to set up your first set of 571 rear gears......and congrats on getting Precision as that is probably the best qual gear for a Toyota application.
Next time, just send it my way and I will set it to racing standards. I will do a link on it also.
Also, there is a surface preparation process(slips my mind right now) that results in a chrome-like finish that means no break-in required.....run it right in the desert at 80 mph with no break-in. I know Randys offers service for about 75.
Oh ...... the name of the process is called REM resulting in an isotropic finish.....
Here's a goodarticle....they specifically mention racing and off-road also
http://www.metalimprovement.com/case.php Judging by the way they talk of this process, maybe cryo is not required if isotropics is applied......
Wow....here's a ring gear with an "isotropic finish"
http://www.musclemotorparts.com/REM.htmhttp://www.procryo.com/RemGears.html ZUK
