84CUCV
3/4 ton status
sold the old axles out of it. forgot to take some measurements. i have 1 tons for it now. not sure how to center the axle and find the pinon angle. thanks hope to get this all done this weekend
CK5
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spring pad width on a 1980 k20
- Thread starter 84CUCV
- Start date
Perch width should be 42.5" center to center. The perches themselves are 2.5" wide.
You can measure between the inside of one backing plate to the other backing plate, then subtract 45" (42.5" + 1.25" + 1.25" to get the overall width), then divide by 2 to get the theoretical distance needed from the inside of the backing plate to the outer edge of the spring perch on either side.
As for pinion angle, I got my perches marked out and put two sacrificial tacks on them. Just enough to hold them in place, but really easy to hit them with a grinder later. Then i got the diff under the truck with the springs resting on the perches and the u-bolts on a little more than finger tight. Now I know the diff is centered under the truck...so I nipped out the small tacks and used a bottle jack under the yoke on the diff and slowly jacked up the front of the diff until I got it to the angle best suited for me.
Your best angle depends on the type of driveshaft, your drivetrain angle, etc etc.
Once everything looks the way you want it, nad provided the perches are still on their marks go ahead and tack everything up good and solid. Remove the u-bolts and weld them up.
Rene
You can measure between the inside of one backing plate to the other backing plate, then subtract 45" (42.5" + 1.25" + 1.25" to get the overall width), then divide by 2 to get the theoretical distance needed from the inside of the backing plate to the outer edge of the spring perch on either side.
As for pinion angle, I got my perches marked out and put two sacrificial tacks on them. Just enough to hold them in place, but really easy to hit them with a grinder later. Then i got the diff under the truck with the springs resting on the perches and the u-bolts on a little more than finger tight. Now I know the diff is centered under the truck...so I nipped out the small tacks and used a bottle jack under the yoke on the diff and slowly jacked up the front of the diff until I got it to the angle best suited for me.
Your best angle depends on the type of driveshaft, your drivetrain angle, etc etc.
Once everything looks the way you want it, nad provided the perches are still on their marks go ahead and tack everything up good and solid. Remove the u-bolts and weld them up.
Rene
Stomis
Professional Amateur
Lemme know if you need some help when your around here man. I havent worked on anything in quite a while.
84CUCV
3/4 ton status
thanks but the truck im working on is in north nj
