I know this doesn't apply to many on this forum but I felt like this article was too good not to post. OBX vs Quaife (with pixors) - Drivetrain - HybridZ

 

This is why when I eventually put an LSD in mine I will only use Quaife and not even consider the OBX.

 

I went Quaife but am having issues with mine. it keeps going thru Axle seals as it doesnt seem its supporting the drivers axle properly.

 

OBX arent terrible units, but they are cheap for a reason, its the age old saying, you get what you pay for. Neon guys were using them with large amounts of success if they replaced the washers with heavier duty versions in a different stack pattern, then the thing would work just fine.

 

Anyone have issues with quaife inside wheel spin when on R compound tires (at autocross)?

 

I've only been out once with mine since i installed it (due to axle seal issues) if i make fontana road race at the end of the month, i'll try and see if i feel spin.

 

I will be using the f23 for drag racing and still am not sure what lsd unit I want to go with. I want to to the quaife because I don't think team green will hold all of the tq

 

Google quaife. Understand how it operates. If the car under steers and rolls a lot the Inside wheel will squawk the gears do not Like it. I use high helix quaife and the car has awesome handling I got no squawk at all. If the axle seals leak it's not the quaife assuming it's installed properly and in good condition.

 

Lincoln Locker

 

interesting update.. after another phonecall with quife and the shop, they think its because the spindle sits higher than the transmission output, so the slip angle is off and making it ride. Only thing i dont get is why didnt it leak for the year prior to the trans rebuild that the car was on coilovers.

Trying to think about how to properly remedy this.

 

??? no logic there

 

Thats what I said John. How would that affect it? But thats what the representative from Quaife told us. Im just not sure why the axle is resting on the seal and not being supported inside the diff when everything is brand new.

 

check the carrier bearings

 

indeed. Thats true. But the quaife is a very good unit as it sits.

I think your issue is coil overs; when you go to coil bind and run out of suspension travel bad things happen. Unlike the F35 cars, the F23 Cobalt has a really long passenger side axle shaft and that can be part of your problem. Going too low with suspension is 100% slower on the track than a car with higher trim height and sufficient ride travel to eliminate bottoming on the suspension.

Too low is not good. Although for sure its better aerodynamically to be about 2 inches or lower off the ground, the inefficiencies gained have to be plotted against practicality and require design change.

I made a Z06 with a seq. gearbox and a flat carbon undertray and 2 inches of ride height at the splitter. The car bottomed in the trailer when unloading, in the paddock also, so was difficult just to get on the track. Once on track the gains were there, about two tenths a lap, but the gearbox overheated and seized the seq shift rod; in the end we had to raise the car back up, and remove part of the carbon undertray to get the transmission to live. The trans had its own pumps and coolers, but they cannot overcome heat soak when the car stopped running.

On this Z06, to achieve that ride height with suspension travel, we installed special cast drop spindle knuckles at a cost of $5,000.00. The carbon honeycomb undertray was 3500.00 The seq gearbox was 40,000.00

The least expensive mod on the car was the area47 tune. Including air fare. That car was was built in 2006-2007 and the tune is still good to this day. 600+ whp.

I would guess that on your Cobalt, with our spherical cabs, rear beam inserts, rear bar and YYZ springs with decent struts and shocks you would sit higher, have less issues and go faster. But thats for you to decide. In the meantime raise the car up and check the transmission bearings; you can remove the axles and run a correctly sized small diameter pipe through the quaife and see if there is play discernible in the quaife unit which would indicate a bearing issue perhaps. I am clutching at straws here, as otherwise, it takes complete disassemble of the transmission

 

Just curious if you've tried those axle seal sleeves? They go on the OD of the axle shaft where the ID of the seal seats. Basically making the OD of the axle shaft a little larger to tighten up the fitment between the seal and axle.