Front CV Maximum Angles
Posted: Fri, 15 Dec 2023 11:46 +0000
I have done some searching on this but comes up with allot of random speculations, so if there is a thread I've missed please direct me there
I want to know what the maximum CV angles are for the front drive half shafts are, inner and outer.
The reason I want to know this is because I want to know what safe amount of droop I can add to the suspension (coilover spacer) before the shafts start to contact the housings. Note that full droop the wheels is most likely off the ground or in a very low traction situation, so pressure on the CV should be low at the max extreme, this is more that it doesn't yank the inner. (Clearly as soon as I limit the ball joints out of the UCA then that is its maximum droop).
I've looked on the GKN website and I got this about the inner CV.
I think the inner is this type - Tripod Plunging (AAR) Joint
In addition to the properties of the GI joint, the low plunging resistance and low axial forces of the AAR joint deliver additional NVH refinement, making it appropriate for high working angles. It has a maximum articulation angle of 26 degrees and 50mm plunge.
If that is true 26° is allot, as I'm currently measuring only 18.8° at full droop. (7.2° left of safety).
The outer CV joint I'm not sure, but I'm guessing it's the 50°versions? clearly this has steering to deal with also so true working angle is a combination of steering angle and shaft angle etc.
I've ordered a Kaon diff drop kit, which is in UK customs at the moment so not got my hands on it.
Now I know allot of times people ask how far can I lift my truck and that is when CV angles suffer as they are operating at this extra height at all the time, but this is not what I'm after here, I'm happy to run a 40mm lift but I'm just trying to gain as much articulation as possible. I want to add a spacer at the top of the BP-51 to push shock down, and trade that for shock compression so I'm not so close to topping the coilover out. Currently 9mm away from stops with 10mm preload!
When the diff drop arrives I plan to strip the BP-51 down and do some accurate measurements, as I have a feeling the BP-51 shock is kinda short but without knowing what other brands do I can only go off what the OEM shock length is.
Be interested to know what people know or what they have learnt by going to far etc.
I want to know what the maximum CV angles are for the front drive half shafts are, inner and outer.
The reason I want to know this is because I want to know what safe amount of droop I can add to the suspension (coilover spacer) before the shafts start to contact the housings. Note that full droop the wheels is most likely off the ground or in a very low traction situation, so pressure on the CV should be low at the max extreme, this is more that it doesn't yank the inner. (Clearly as soon as I limit the ball joints out of the UCA then that is its maximum droop).
I've looked on the GKN website and I got this about the inner CV.
I think the inner is this type - Tripod Plunging (AAR) Joint
In addition to the properties of the GI joint, the low plunging resistance and low axial forces of the AAR joint deliver additional NVH refinement, making it appropriate for high working angles. It has a maximum articulation angle of 26 degrees and 50mm plunge.
If that is true 26° is allot, as I'm currently measuring only 18.8° at full droop. (7.2° left of safety).
The outer CV joint I'm not sure, but I'm guessing it's the 50°versions? clearly this has steering to deal with also so true working angle is a combination of steering angle and shaft angle etc.
I've ordered a Kaon diff drop kit, which is in UK customs at the moment so not got my hands on it.
Now I know allot of times people ask how far can I lift my truck and that is when CV angles suffer as they are operating at this extra height at all the time, but this is not what I'm after here, I'm happy to run a 40mm lift but I'm just trying to gain as much articulation as possible. I want to add a spacer at the top of the BP-51 to push shock down, and trade that for shock compression so I'm not so close to topping the coilover out. Currently 9mm away from stops with 10mm preload!
When the diff drop arrives I plan to strip the BP-51 down and do some accurate measurements, as I have a feeling the BP-51 shock is kinda short but without knowing what other brands do I can only go off what the OEM shock length is.
Be interested to know what people know or what they have learnt by going to far etc.