Rear ends

[Smokey73]

I'm planning to rebuild a spare dually axle for Big Russ next week. I don't know for sure what it is stuffed with, but I want to split the difference between the 3.55's that are in the truck now, and 4.10's. I was thinking 3.73's, but I don't know if they're even available for the rear ends, or even where to get a gear set from.

 

[3day240sx]

http://broncograveyard.com/bronco/c-450

 

[Smokey73]

what color speedo gear would I have to change to. Is there a chart somewhere?

 

[jperecko]

I also like Randy's Ring and Pinion

 

[Smokey73]

What's the deal with the long and short pinions. What do I have to look out for when ordering?

 

[Black dawg]

seems like 93 and later use the short pinion.

 

[sle2115]

seems like 93 and later use the short pinion.

NOPE! 92 on up use the long pinion. The break was in 1992, so a 1992 could have either. This is from two VERY reliable sources. I just purchased Ring and Pinion gears for mine, so I was researching quite a bit. You can use the long pinion in a short pinion too, just have to have a different yoke, or so I'm told.

 

[franklin2]

I heard they had a problem with the splines wearing on the rearend yokes(I have seen this several times myself) and they made the pinion spline area longer to combat the problem(more surface area).

 

[87crewdually]

NOPE! 92 on up use the long pinion. The break was in 1992, so a 1992 could have either. This is from two VERY reliable sources. I just purchased Ring and Pinion gears for mine, so I was researching quite a bit. You can use the long pinion in a short pinion too, just have to have a different yoke, or so I'm told.

Your source is correct. You can use a long spline pinion but will also replace the yoke if installing on 92-down.