Fox New Shoes for Black Jack!
- By FastDriver
- 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
- 236 Replies
Potential D/S length Solution:
Alright, so, here's the skinny: I have 3.6" to play with (ct alert here, @Noobz347). That is, from the tip of the yoke, the full length until it begins to widen is ~3.6". If I was effective in approximating having weight on the tires and I got the trans in the right place, then there's about 1.6" of yoke that will be exposed outside of the tailhousing and about ~2" of yoke-to-output shaft spline engagement. The recommendations out there from forums I've googled are that you want a minimum of .75" of yoke exposed beyond the output shaft housing to deal with suspension travel. Many folks on the drag race forums suggest 1". So, that's the tolerance I've decided on.
TMI: The rule-of-thumb for the amount of spline engagement required on very high hp cars is "1.5 times the diameter," but although that exact phrase is mentioned repeatedly, no one seems to finish their sentences. I believe what they mean is 1.5 times the diameter of the splines on the output shaft. If true, I measured the shaft at ~1.2" which would require 1.8" of spline engagement -- no issue. At worst case, though, the barrel diameter of the outer portion of the yoke is 1.5", which would require 2.25" of spline engagement, which I fall short of.
While looking around I found that Steeda produces an 11/16 (0.6875") pinion flange spacer. That should bring the exposed yoke length down to just under 1", and the spline engagement to just over 2.6" which I feel is about perfect.
Alright, so, here's the skinny: I have 3.6" to play with (ct alert here, @Noobz347). That is, from the tip of the yoke, the full length until it begins to widen is ~3.6". If I was effective in approximating having weight on the tires and I got the trans in the right place, then there's about 1.6" of yoke that will be exposed outside of the tailhousing and about ~2" of yoke-to-output shaft spline engagement. The recommendations out there from forums I've googled are that you want a minimum of .75" of yoke exposed beyond the output shaft housing to deal with suspension travel. Many folks on the drag race forums suggest 1". So, that's the tolerance I've decided on.
TMI: The rule-of-thumb for the amount of spline engagement required on very high hp cars is "1.5 times the diameter," but although that exact phrase is mentioned repeatedly, no one seems to finish their sentences. I believe what they mean is 1.5 times the diameter of the splines on the output shaft. If true, I measured the shaft at ~1.2" which would require 1.8" of spline engagement -- no issue. At worst case, though, the barrel diameter of the outer portion of the yoke is 1.5", which would require 2.25" of spline engagement, which I fall short of.
While looking around I found that Steeda produces an 11/16 (0.6875") pinion flange spacer. That should bring the exposed yoke length down to just under 1", and the spline engagement to just over 2.6" which I feel is about perfect.