The backlash is the "play" between the gears. It should be like .009-.015 or something like that..on the 2 sets of FMS iv'e done. they came in at the max or largest dim allowed...no noises with either set...I checked mine just like pic #1
On the large carrier shims....I bagged as removed from one side and re-installed on the SAME side at re-assy...Watch the chamfer.. on one side of those shims, they have a large chamfer...be mindfull if it was facing in or out...may want to jot that down when removed....
Corral has a great article on doing up gears...check that out to...
http://www.corral.net/tech/drivetrain/gears.html
On the large carrier shims....I bagged as removed from one side and re-installed on the SAME side at re-assy...Watch the chamfer.. on one side of those shims, they have a large chamfer...be mindfull if it was facing in or out...may want to jot that down when removed....
Corral has a great article on doing up gears...check that out to...
http://www.corral.net/tech/drivetrain/gears.html
You want everything snugged up to spec to check the backlash....the whole set-ups gotta be done to verify it....if anything is loose....your dimension is bogus..
backlash is one of the last things you check...pinion nut TQ'd, bearing caps TQ'd..then you check the backlash...then check the pattern...if all looks cool...your done..the backlash is checked in a free state so to say...its just the "slop" lets call it in the gear set...before you tear yours apart, set-up your indicator and check it...you'll see what i mean....make sure the DS isnt connected though...its kinda like when your bringing your rockers to zero lash, your just lightly "feeling" for that zero dim...
Like I say, i have done these twice, about to do a 3rd time as i'm swapping in 373s myself...im no pro, but they've come right into spec for me..
the carrier shims are (1) each side..they are .250-.300 thick each, they are under the bearing caps that you remove..Be mindful of the chamfer direction on those shims, as one side is chamfered, you wanna re-assy the same way...your gear set will come with a assortment of ring gear shims to. My stock ring gear had nada behind it....so i used nada for the swap...
backlash is one of the last things you check...pinion nut TQ'd, bearing caps TQ'd..then you check the backlash...then check the pattern...if all looks cool...your done..the backlash is checked in a free state so to say...its just the "slop" lets call it in the gear set...before you tear yours apart, set-up your indicator and check it...you'll see what i mean....make sure the DS isnt connected though...its kinda like when your bringing your rockers to zero lash, your just lightly "feeling" for that zero dim...
Like I say, i have done these twice, about to do a 3rd time as i'm swapping in 373s myself...im no pro, but they've come right into spec for me..
the carrier shims are (1) each side..they are .250-.300 thick each, they are under the bearing caps that you remove..Be mindful of the chamfer direction on those shims, as one side is chamfered, you wanna re-assy the same way...your gear set will come with a assortment of ring gear shims to. My stock ring gear had nada behind it....so i used nada for the swap...