In setting up my 8.875 12 bolt with a Richmond 3.73, I've now got a good repeatable .008 backlash. Pinion preload is around 22 inch pounds. About 30 with the carrier in. All I can say is thank god for "Super shims". How would you get a stack of thin shims in otherwise?
My pattern now shows a very noticable high bias toward the crown and slightly toe on both Drive and coast. Pattern shows no marking compound visible at the crown whatsover. I Feel the pinion is too shallow, and needs to be moved out towards the carrier.
Following BGH's "Forget pinion depth measurement" and for right or wrong, a recomendation I saw on line on a Hot Rod magazine tech tip. It recomended a starting point of a .025-.027 pinion shim with a 3.73 gear. I realize I have to go bigger on the shim, but how far should I initially go? .002, 005 or more?
How much would you add? And was .027 a reasonable starting point, or was I way off?
Any thoughts?
Cheers, Mark.
My pattern now shows a very noticable high bias toward the crown and slightly toe on both Drive and coast. Pattern shows no marking compound visible at the crown whatsover. I Feel the pinion is too shallow, and needs to be moved out towards the carrier.
Following BGH's "Forget pinion depth measurement" and for right or wrong, a recomendation I saw on line on a Hot Rod magazine tech tip. It recomended a starting point of a .025-.027 pinion shim with a 3.73 gear. I realize I have to go bigger on the shim, but how far should I initially go? .002, 005 or more?
How much would you add? And was .027 a reasonable starting point, or was I way off?
Any thoughts?
Cheers, Mark.