12 bolt r & p setup

Paul Merolla · 11-08-2008, 01:09 PM

I'm halfway through setting up my first ring & pinion for my stocker, and thought I'd better stop and ask a few questions before buttoning it up...don't want to have to do it all over. First, the manuals I've been using are all aimed at the typical rebuild, not a race application. The pinion bearing preload specs are calling for 20-25 in./lbs. for new bearings...is it unwise to lower that number for less rolling resistance? Same goes for carrier bearing preload...they say "as tight as you can without damaging the shims during installation"; that seems kind of vague to me, but I don't see any way to measure it. One more: I am assuming backlash is not really a place to gain or lose rolling resistance - specs call for .006-.008 for a pro gear...does that sound right? Thanks in advance!
BTW, the gearset is used - just a few passes, but looks fine and has a good pattern.

11-08-2008, 01:09 PM	#1
Paul Merolla Senior Member Join Date: Dec 2001 Location: Papillion, NE Posts: 610 Likes: 242 Liked 293 Times in 65 Posts	12 bolt r & p setup I'm halfway through setting up my first ring & pinion for my stocker, and thought I'd better stop and ask a few questions before buttoning it up...don't want to have to do it all over. First, the manuals I've been using are all aimed at the typical rebuild, not a race application. The pinion bearing preload specs are calling for 20-25 in./lbs. for new bearings...is it unwise to lower that number for less rolling resistance? Same goes for carrier bearing preload...they say "as tight as you can without damaging the shims during installation"; that seems kind of vague to me, but I don't see any way to measure it. One more: I am assuming backlash is not really a place to gain or lose rolling resistance - specs call for .006-.008 for a pro gear...does that sound right? Thanks in advance! BTW, the gearset is used - just a few passes, but looks fine and has a good pattern.