Hey guys, I broke my RR knuckle and I have got a guy offering me an AP2 knuckle (I have an AP1). Anyway, I notice the part no. is different, so what exactly are the differences and it it compatible--anyone know?

 

I have an Ap1 With a Ap2 Left axle I was not aware that the Ap1 and ap2 axles were different. However I know the right and left axles are different lengths.

 

Thanks learner good to know. I found the answer out there for guys who are searching:

[quote name= ajatx]Just an FYI to this thread:
I thought the AP1 and AP2 knuckles can be interchanged, making swap of the defective wheel hub easier.

I have both side by side and you can see the slight differences in angle for the ball joints as well as thickness of the arms from the knuckle.
After the shop installed it, my toe was off more than 2 degrees! I got an alignment and it's straight, but I still feel the rear is a bit unstable compared to the AP1 knuckle.

Unfortunately, it's already installed on my AP1 on the passenger side. I've done a few track events but I can feel the slight instability in the rear when the suspension is compressing and de-compressing. Perhaps it wasn't as noticeable at the track since I'm typically loading up that side (counter clockwise track).[/quote]