Members Marshall M. Posted June 21, 2016 Members Share Posted June 21, 2016 Background: Mustang with 8.8" rear Backlash I've read anywhere between 0.008-0.012. Not sure if tight or loose is better for racing Pinion Depth Does everyone setup their pinion depth for a wear pattern in the middle of the gear, or do you favor the heel or toe of the gear? Pinion Drag I've seen anywhere between 16-24 in-lbs on a new bearing... High side or low side of that range?? Quote Link to comment Share on other sites More sharing options...
lonewolf583 Posted June 23, 2016 Share Posted June 23, 2016 Background:Mustang with 8.8" rear Backlash I've read anywhere between 0.008-0.012. Not sure if tight or loose is better for racing Happy medium on this guy. Too loose invites more shock loading and noise when you transition from acceleration to deceleration and vice versa. Too tight invites a smaller oil film for lubrication and cooling. Anywhere in that range should be fine. Pinion Depth Does everyone setup their pinion depth for a wear pattern in the middle of the gear, or do you favor the heel or toe of the gear? Right in the middle. Ever so slightly biased towards toe is ok. More safety margin in the toe. Pinion Drag I've seen anywhere between 16-24 in-lbs on a new bearing... High side or low side of that range?? Can't comment here. Quote Link to comment Share on other sites More sharing options...
Members Marshall M. Posted June 27, 2016 Author Members Share Posted June 27, 2016 Background:Mustang with 8.8" rear Backlash I've read anywhere between 0.008-0.012. Not sure if tight or loose is better for racing Happy medium on this guy. Too loose invites more shock loading and noise when you transition from acceleration to deceleration and vice versa. Too tight invites a smaller oil film for lubrication and cooling. Anywhere in that range should be fine. Pinion Depth Does everyone setup their pinion depth for a wear pattern in the middle of the gear, or do you favor the heel or toe of the gear? Right in the middle. Ever so slightly biased towards toe is ok. More safety margin in the toe. Pinion Drag I've seen anywhere between 16-24 in-lbs on a new bearing... High side or low side of that range?? Can't comment here. Ended up with 0.0075 backlash, wear pattern right in the middle and 26 in-lbs for the pinion drag... It's been about 11 years since I've setup gears and forgot how much assemble/check/disassemble/repeat there is... Quote Link to comment Share on other sites More sharing options...
Members Marshall M. Posted June 27, 2016 Author Members Share Posted June 27, 2016 Background:Mustang with 8.8" rear Backlash I've read anywhere between 0.008-0.012. Not sure if tight or loose is better for racing Happy medium on this guy. Too loose invites more shock loading and noise when you transition from acceleration to deceleration and vice versa. Too tight invites a smaller oil film for lubrication and cooling. Anywhere in that range should be fine. Pinion Depth Does everyone setup their pinion depth for a wear pattern in the middle of the gear, or do you favor the heel or toe of the gear? Right in the middle. Ever so slightly biased towards toe is ok. More safety margin in the toe. Pinion Drag I've seen anywhere between 16-24 in-lbs on a new bearing... High side or low side of that range?? Can't comment here. Ended up with 0.0075 backlash, wear pattern right in the middle and 26 in-lbs for the pinion drag... It's been about 11 years since I've setup gears and forgot how much assemble/check/disassemble/repeat there is... Quote Link to comment Share on other sites More sharing options...
lonewolf583 Posted June 28, 2016 Share Posted June 28, 2016 Background:Mustang with 8.8" rear Backlash I've read anywhere between 0.008-0.012. Not sure if tight or loose is better for racing Happy medium on this guy. Too loose invites more shock loading and noise when you transition from acceleration to deceleration and vice versa. Too tight invites a smaller oil film for lubrication and cooling. Anywhere in that range should be fine. Pinion Depth Does everyone setup their pinion depth for a wear pattern in the middle of the gear, or do you favor the heel or toe of the gear? Right in the middle. Ever so slightly biased towards toe is ok. More safety margin in the toe. Pinion Drag I've seen anywhere between 16-24 in-lbs on a new bearing... High side or low side of that range?? Can't comment here. Ended up with 0.0075 backlash, wear pattern right in the middle and 26 in-lbs for the pinion drag... It's been about 11 years since I've setup gears and forgot how much assemble/check/disassemble/repeat there is... It's definitely tedious! Quote Link to comment Share on other sites More sharing options...
Angry Banana Racing Posted July 13, 2016 Share Posted July 13, 2016 https://performanceparts.ford.com/download/instructionsheets/FordInstShtM-4209-8.pdf I used this and it helped alot. As far as high or low end of preload, i'd say higher end since new bearings wear in and might loosen a hair. Quote Link to comment Share on other sites More sharing options...
B-MAC Posted September 2, 2016 Share Posted September 2, 2016 Backlash is a little tight. Shoot for .011-.015 next time. i.e., for road racing. Quote Link to comment Share on other sites More sharing options...
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