ive seen a lot more people complaining about breaking gears.
seems to be the trend when people start making more power.

im not talking about peope wheel hoping and breaking the housing or stuff like that. im talking about 3rd gear shredding from traction and power at the track...

what is the average setup when people are doing this? how much hp and tq?
just wondering

 

Not sure if it's the same for the lsj or not but the lnf tranny seems to go right around 400 whp for some people. Others are more lucky.

 

There's also people that blow gears almost stock. Almost seems like a luck kinda thing with how strong a tranny you get

 

It'd be a bit hard to separate power failures versus failures due to the driver or how it had been driven, an example being just running 500hp through it versus no-lifting all the time.

I'd wager that if any stock cars are blowing transmissions, it'd be due to NLS, bad shifting (whether it be the driver or bad TOB), wheelhop, or overly sticky tires/clutch.

 

yes hahah yes

 

i was just thinking about this, How many of you guys that are bolted and tuned still NLS?

 

I will still NLS from time to time. It really depends on how the race is going, but I really try to avoid NLS's being that it is alot of extra stress on the transmission. And I have an LSJ though.

 

My first transmission was NLS'd a fair number of times both on stock and tuned power levels. I went to E85, and then third went completely out on it and then it was iffy whether I could grab other gears.

On my second transmission, I avoided NLS while on tuned power and I NLS'd only a handful of times only when on "stock tune" power level, with a messed up NLS on only one occasion. Then later the transmission went out within a few months of doing the engine build, which added head/cams/clutch mods adding more stress on it. Second gear shifts started grinding sometimes, so I took it in, and then the tech had nearly all the gears go out on him (stock flash at the time) while testing the second gear.

I'm on a third transmission now that had about 20K miles on it when I swapped it in, so I don't know its history. I feel like I'm on borrowed time now though, and looking for sustainable options so I can stop stressing in the back of my mind if the next gear shift will be my last.

So there are a few data points: I had one go out while basically tuned with E85, but with NLS history, and then another go out with a sticky clutch and more power, but pretty much no NLS history.

 

I don't think I've done a NLS since being tuned. That's not saying I wouldn't, I just don't race people really.

 

How many people are busting transmissions on a stock car? COMPLETELY stock? I know you can count these guys on one hand, but I'm curious. I'm stock, and I plan to stay that way.

 

well a ton of guys who race have blown up axles and cracked cases on the tranny stock...
but im prety sure no one has blown out gears stock. but not many of these cars are stock any more

 

thanks for the input as well. maybe we can get a few more people with a bit more knowledge about busted trannies.

also there is a thread about shep transmissions building us a beefed up tranny to withstand more power. i have a second transmission that i am thinking of sending to them just for piece of mind

 

In short... Our transmission weren't supposed to handle anything past like 258Lbs of Torque or something like that.... At least the F35... From what I understand F35's are better than the LNF's transmission

 

Huh? The LNF uses the F35...

You mean the slightly higher final drive F35 found in the HHR SS and LSJ Cobalt SS versus the lower final drive F35 in the LNF Cobalts?... Because they're all the same exact F35s other than the ratios.

 

BUMP so wheres the built trannys? why is a built trans so hard to get when a Full blown turbo kit is just 3 grand away?

 

has anyone taken the gears out and had em cryo2ed?

 

That's what Saab initially certified them to in the later revision behind their 2.3L Ecopower (B235R) powertrain in the previous generation 9-5 Aero. Besides the 9-5 sedan they also used the F35 in the heavier 9-5 Aero wagon and backed the factory powertrain warranty even with the Hirsch 305 hp, 310 ft-lbs upgrade kit in both sedan and wagon when they were new. The factory input torque certification numbers are just that, numbers that the manufacturer tested and certified what the transaxle or transmission is able to hold and meet all their internal durability requirements. That doesn't mean a trans won't hold more power, just that it wasn't tested to higher input torque. The vehicle weight also plays a big part and taking a trans from the heavier 9-5 and using it in the lighter Cobalt should decrease stress on the internals, case, etc.

 

Link to thread? Good info in this thread BTW.

 

i have been through two, cracked my first one due to being a dummy and racing from a dig with all the wheel hop.

second time is when i was just about fully bolted and tuned with mounts and stage 2 axles, blew 5th gear............of all gears 5th, dont ask me how cuz i know how to drive my car.......so yea, you heard me right lol. so i just went with a HHR since they have they higher FD knowing chevy would never warranty my car.

 

finally an option for t35 guys


this is just stupid i cant link to the actual website in this thread...

anyways thats the link thats the name of the thread

 

That's what I've been wondering.

Shep's option requires money and waiting, the ZZP 5 speed is no longer being shipped, and the ZZP 6 speed option isn't out yet. :/

Yeah, Mongorat had one Cryoed, assembled by Powell, and then sent on to Texas. No idea who it's for though.