Thread: Cryotreating gears to improve strength...

Okay guys, I know this has probably been asked 100 times before, but I'm not getting definitive answers to my particular question, while searching here and on the other site...


Tranny pulled from car last night: (I think) 1999 P11 non-lsd (which means older gearstack, not the beefy one).

Problem: I don't think my tranny will hold with the power I plan on putting down (GT3076R on a built block, big cams, etc. etc.)

Solution(s): Do I sell of the 1999 non-lsd P11 tranny and look for a 2000+ P11/B15 tranny? Or, can I cryotreat/shotpeen the 99 P11 tranny for strength comparable to that of a P11 (2000+) or more? IF at all possible, I'd like to have the shotpeen/cryotreat done if it will save me money, and still provide the same performance of the newer gearstacks...

The clutch setup will be the ACT XTPP with the 6 puck sprung disc...

Thanks.

i would DEFINITLY say sell the non lsd to get the lsd, from what i have heard, cyrotreating and shot peening the parts are really going to yeild you a whole lot of strength over stock, jgy claims 20% incease in srength over sock for cyro and 25% over stock with shot peening, but with the lsd transmission you are having physiclly bette internal transmission parts, verses having weaker parts treated to give a little more strength. i too was going to get a b13 transmission worked like that, but the gain overall wasnt worth the money i ddidnt think personally.

imagine getting the g20 lsd trans and having that worked lol

you are going to be pushing some real nice numbers i personally wouldnt chance it, but thats just me, i wouldnt want a weak link in a setup mking over 500.

not only that but you would really benifit in your setup with a lsd that is for sure

regardless of strenthening the gears, the way the older transmissions are designed, they are doomed to fail. I would recommend selling your 99 and getting a 00-up tranny. At the end of the day you'll have spent $200-400 more if even that since you can sell your tranny for $500+.

-JCC

I have a 01 p11 trans in my VE-T and it holds amazing. I can slam third and it just grabs hard and takes off. So far so good. Hopefully the tranny holds up when I really start pushing the boost. Looking for 20 psi on pump at least. The older transmissions will not hold up for long at even 300whp, but my old sentra is still going making about 340whp and it has not broken third yet. But in your case I would save your pennies and get the newer trans.

Thanks guys Looks like I'm in the market for a 00+ P11 LSD tranny then. Damnit that means I need an axle too. (I needed one anyway )

I think that NOT having LSD in the tranny is going to hurt you more than the strength. You'll spin one tire with all that that turbo is going to spit out & an open-diff isn't going to aid at ALL. You are better off getting both wheels turning . When they are BOTH spinning, then you can worry about if they'll hold up or not. Get a 2000+ basically

The less traction you have, the less likely you are to break anything. =]
Run an open diff and skinnies up front and you can run any tranny you want.

Seriously though, the problem with the B13 and other transmissions (if you didn't know already) is that the gear stacks separate, causing the gears to sheer. The 3rd gear is in the middle of the stacks, making it the most prone to sheering as the stacks separate. Cryo-treating increases the strength of the gears a bit, allowing them to resist sheering slightly, but it is really just a band aid. The shot-peening makes the metals coefficient of friction lower, preventing wear to the metal, and has almost no affect on the ability of the transmission to hold together under load.

If you're going over 280 HP, you need a transmission with mechanisms in place to keep the gear stacks in place. I'm not up on which years those are, but if this P10 tranny you mention doesn't have the spring-loaded bearing holding the stacks together, I'd ditch it.

best of luck sir, :P

if you get a p11 trans you need one from a 01+. The 00+ b15 tranny is stronger too. Just don't make the mistake of getting the 00 P11 trans because it is the same as the 99!