Does anyone know the stock pinion angle for a 14 bolt ?
CK5
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Pinion angle question
- Thread starter dheavychevy38
- Start date
Pretty much gonna depend on what you’re putting it in, lift, driveshaft style etc…..when I do perches I set the axle in the truck, and get the angle where I want it at ride height and tack the perches, then remove it and finish weld. Easier to set angle now than fix it later with shims.
It’s a stock gmt400 94 k3500
There isn't any set angle, it's all relative to the vehicle, height, drivetrain. If you're not running a CV joint on one end then you want the trans output shaft and the pinion shaft parallel to each other.
Wheel base figures in as well
as per Zimmer's pic. if it's a cv shaft, you want it pointing more or less to the trans output. maybe a degree or 2 down as the axle will torque a hair.
If it's not, get a magnetic angle finder and stick to someplace on the trans/output location measure it and match it on the axle. Again a degree or 2 down never hurts.
If it's not, get a magnetic angle finder and stick to someplace on the trans/output location measure it and match it on the axle. Again a degree or 2 down never hurts.
When I did my truck, I bolted everything together u-bolts and all. Got it all on it's weight and spun the pinion to where I wanted it. Then tacked it in. Pulled it back out and burnt it fully.
Exactly how I did mine.
This is my Jimmy as it sits with 6º shims. I'm guessing i will need to find someone with a welder to redo the spring perches?
these angles seem steep for a 3" lift. I have the TC/Trans brace up against the rail spacers on top prefer not to drop since the front would suffer.
The shock mounts will be fkd so i guess cut those and re-weld too?
these angles seem steep for a 3" lift. I have the TC/Trans brace up against the rail spacers on top prefer not to drop since the front would suffer.
The shock mounts will be fkd so i guess cut those and re-weld too?
If it doesn't vibrate you may be ok. Just keep an eye on things. Make sure the U-Bolts stay tight, and the u-joints stay tight.
It has a vibration at about 65 mph thats why i put in the D Carden driveshaft and Tom Woods SYE. bummer to spend all that cash and still have vibration.
Traffic cruises around 75mph so even in the slow lane i'm shaken down the road. I'm guessing axle will be somewhere around 13-14º when done. seems steep
I wish there was a simple chart for these trucks with lift and degree or shim needed. seems like each K5 has its own quirks no standards
If its vibrating, you probably need more tilt. but make sure it's not tires or something else. At some point the shims will get kinda ridiculous and you'll want to have the perches moved. As for a chart, there's too many factors. And with leaves its better to be a degree or 2, high than low. Going down the road the leaves will twist a little bit from torque and the nose will come down a hair.
I went through all of this w/ my truck. It was like a paint shaker at 10mph. Had a normal slip shaft, got it balanced several times, no joy. Went to a double-cardan and got the angles right. Smooth as stock.
I went through all of this w/ my truck. It was like a paint shaker at 10mph. Had a normal slip shaft, got it balanced several times, no joy. Went to a double-cardan and got the angles right. Smooth as stock.
With a CV shaft you want the pinion in line with the driveshaft….are you sure you don’t have the pinion rotated up to high? 6 degrees seems like a lot for 3”
did you need to adjust the shock mounts too?
it makes sense to do them at the same time another 4º tilt will tweak the stock shock angles on my axle
it makes sense to do them at the same time another 4º tilt will tweak the stock shock angles on my axle
I will triple check tomorrow. I checked the angles twice with drive saft off and on thinking no way could it need more shim angle.
I'll take a photo or 3
The rear axle and driveshaft should both be same angle right? I'm thinking I need 3-4º of rear axle up
1 to 1.5 up. 3 to 4 would be a lot
The rear 10 bolt is a diesel military surplus for the M1009. Did these posibly have a different angle perch than the Ga K5?
