QuickStyle Posted March 17, 2018 Report Share Posted March 17, 2018 just did a 2/4 drop on my 04 SS (spindle, shackles, hangers). you can visually tell the driveline and pinion are pointing up, so i check with my angle finder and it calculates out to POSITIVE 7 degrees, i understand a slight pinion angle change can occur, but this is not right. leaf spring rear ends should be NEGATIVE 5-7 degrees. is this something that happens because of the lowering, i didnt measure the angle prior to installing the lowering kit, so i dont know how it was before Quote Link to comment Share on other sites More sharing options...
matslp488 Posted March 18, 2018 Report Share Posted March 18, 2018 A couple shims might help Quote Link to comment Share on other sites More sharing options...
EXGM Posted March 18, 2018 Report Share Posted March 18, 2018 I see you have the hotchkis rear sway bar..... where did you get that? Quote Link to comment Share on other sites More sharing options...
QuickStyle Posted March 18, 2018 Author Report Share Posted March 18, 2018 A couple shims might help I would need about 14 degrees of shims to make it correct, seems like a lot. im thinking more along the lines that something is wrong. the kit came with a 1 degree wedge to correct pinion angle, but thats clearly not enough. I see you have the hotchkis rear sway bar..... where did you get that? it came on the truck when i bought it Quote Link to comment Share on other sites More sharing options...
EXGM Posted March 19, 2018 Report Share Posted March 19, 2018 I would need about 14 degrees of shims to make it correct, seems like a lot. im thinking more along the lines that something is wrong. the kit came with a 1 degree wedge to correct pinion angle, but thats clearly not enough. it came on the truck when i bought it You should sell it to me. It may cause harm with that drop..... lol Quote Link to comment Share on other sites More sharing options...
QuickStyle Posted March 19, 2018 Author Report Share Posted March 19, 2018 (edited) You should sell it to me. It may cause harm with that drop..... lol do they not make them anymore? i have the front one too Edited March 19, 2018 by QuickStyle (see edit history) Quote Link to comment Share on other sites More sharing options...
Aldofashow Posted March 19, 2018 Report Share Posted March 19, 2018 do they not make them anymore? i have the front one tooyeah you got lucky Hotchkis doesn’t care about our trucks anymore they have moved on to newer trucks Quote Link to comment Share on other sites More sharing options...
davischevy Posted March 20, 2018 Report Share Posted March 20, 2018 Your pinion angle and yoke angle have to be the same to avoid vibration. Since the one at the tranny/transfer cant be changed, the axle must be rotated to match the opposite angle. Do a search for pinion angle and you will get more diagrams than you need. The 4 to 6 degrees is not uncommon when ride height is changed, but more won't hurt anything. The important thing is the angle is the same at both ends. (But wait, I said that already.) Quote Link to comment Share on other sites More sharing options...
EXGM Posted March 21, 2018 Report Share Posted March 21, 2018 do they not make them anymore? i have the front one too Unfortunately they do not anymore.... Quote Link to comment Share on other sites More sharing options...
QuickStyle Posted March 23, 2018 Author Report Share Posted March 23, 2018 installed 8 degree shims. im now sitting at -1 degrees. looks much better. i thought stock was -5 to -7 degrees, but after verifing a few other 99-06 silverados visually and they all seem to be stock at 0 degrees or so, found one with a 2/4 drop and it had the same -7 angle as mine originally did, so i guess this is normal. i figure -1 degrees should put me at 0 under load at the power level im at, just perfect. not sure why the drop kit doesnt include a shim to correct this. Quote Link to comment Share on other sites More sharing options...
davischevy Posted March 24, 2018 Report Share Posted March 24, 2018 Good to hear. Quote Link to comment Share on other sites More sharing options...
Guest Avva Posted September 10, 2019 Report Share Posted September 10, 2019 On 3/22/2018 at 6:48 PM, QuickStyle said: installed 8 degree shims. im now sitting at -1 degrees. looks much better. i thought stock was -5 to -7 degrees, but after verifing a few other 99-06 silverados visually and they all seem to be stock at 0 degrees or so, found one with a 2/4 drop and it had the same -7 angle as mine originally did, so i guess this is normal. i figure -1 degrees should put me at 0 under load at the power level im at, just perfect. not sure why the drop kit doesnt include a shim to correct this. Where did you get the 8 degree shims ? Quote Link to comment Share on other sites More sharing options...
QuickStyle Posted December 24, 2019 Author Report Share Posted December 24, 2019 On 9/9/2019 at 6:39 PM, Guest Avva said: Where did you get the 8 degree shims ? 8 degree shim is made by rubicon express part number RE1469. the centering hole was too small for silverado, so you will have to use a drill press to make the hole bigger (hand drill will not work), but its the only shim i could find with that big of a degree to make it work. also if you have awd, you will need 1" cv axle spacers to use the 2" drop in the front or the cv joint will pull itself out of the joint. i used part number 10805 made by tuff country Quote Link to comment Share on other sites More sharing options...
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