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Thread: lowering: blocks, leafs, diff angle, shimmed carrier
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AZosian
1st Gear
Posts: 14
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posted July 22, 2015 03:09 PM |
 Edited By: AZosian on 22 Jul 2015 15:11 |
Lowering: Blocks, Leafs, Diff angle, shimmed carrier
What's the biggest size block anyone has used, Taperd or none? Also does anyone pull a leaf spring? And also do we need to maintain a certain diff angle or shim the carrier for the drive shaft?
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Brad
Rotorhead
Posts: 1672
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posted September 02, 2015 03:45 PM |
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quote:
What's the biggest size block anyone has used, Taperd or none? Also does anyone pull a leaf spring? And also do we need to maintain a certain diff angle or shim the carrier for the drive shaft?
I've seen someone use a 4" but that is a lot of block. I use 1.5" I think, with a tapered shim on top to get the diff angle I like. That minimizes and almost eliminates rear end vibration. After you lower it take it for a drive. Look for vibration on light throttle, no throttle, and under acel and decel. Add a shim and retest. It makes a difference and it even moves around the mph that it vibrates at.
Me and Gary have pulled a leaf. Lowers the rear and makes it less bouncy and less harsh. Especially when there's nothing in the bed.
The more you lower it, the more you have to worry about driveshaft and pinion angle. Before I shimmed the rear, the pinion was angled up 2.5*. AFter shim, my driveshaft angled downwards 2 degrees, and the pinion is flat - 0*.
You can also lower the center bearing in the driveshaft with washers if need be but keep in mind that also impacts the angle of the front half of the driveshaft, and if too much angle it'll wear the output shaft bearing .
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