C4 (vs C3) differential question: Yoke longevity
06-28-2011, 02:51 PM
#1
Tech Contributor
Thread Starter
Member Since: Jun 2004
Location: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
Posts: 18,355
Received 768 Likes
on
550 Posts
C4 (vs C3) differential question: Yoke longevity
Just curious why I never hear complaints about output yoke end-wear on C4 differentials similar to how often (and quickly) the yokes wear out in C3 differentials. The basic construction looks similar. Does the "opposite" offset of the C4 wheels reduce the side force enough in straightline driving to reduce/eliminate this problem? Or, what is the reason?
Just curious.
Just curious.
06-28-2011, 03:22 PM
#2
Race Director
Member Since: Sep 2003
Location: Database Error Indiana
Posts: 16,615
Received 230 Likes
on
162 Posts
The yokes on a C3 can push in against the the pin that the spiders ride on pretty easy if the camber is way off. I dont think it can happen on a C4. I put 200k miles on a C3 and never had that problem.
06-28-2011, 08:53 PM
#4
Le Mans Master
This is a very good question. I've never considered this until now, and now I'm curious about this, too. I don't think I've ever heard of yoke end wear problems on a D44 or D36.
Does the "opposite" offset of the C4 wheels reduce the side force enough in straightline driving to reduce/eliminate this problem? Or, what is the reason?
Anybody know the answer to this? I'm guessing maybe better hardening of the yoke ends than was done on the yokes in C2/C3 diffs?
Live well,
SJW
06-28-2011, 10:57 PM
#5
Tech Contributor
Thread Starter
Member Since: Jun 2004
Location: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
Posts: 18,355
Received 768 Likes
on
550 Posts
This is a very good question. I've never considered this until now, and now I'm curious about this, too. I don't think I've ever heard of yoke end wear problems on a D44 or D36.
I doubt this is the answer. In straight-line travel, there's no relative movement between the yokes' ends and the shaft they bear upon, so there should be no wear regardless of side loading in straight-line travel, even in a C2/C3. Remember, no two tires are exactly the same circumference, especially if they've got a few autocrosses or miles on them. There's always going to be some relative movement going on in the differential. Anybody know the answer to this? I'm guessing maybe better hardening of the yoke ends than was done on the yokes in C2/C3 diffs?
Live well,
SJW
I doubt this is the answer. In straight-line travel, there's no relative movement between the yokes' ends and the shaft they bear upon, so there should be no wear regardless of side loading in straight-line travel, even in a C2/C3. Remember, no two tires are exactly the same circumference, especially if they've got a few autocrosses or miles on them. There's always going to be some relative movement going on in the differential. Anybody know the answer to this? I'm guessing maybe better hardening of the yoke ends than was done on the yokes in C2/C3 diffs?
Live well,
SJW
