i have a used posi carrier to install in my 7.5 rear i;m not touching the pinion just putting my ring gear on the new carrier i have a formula to measure carrier preload ... total inch pounds of pinion and carrier minus inch pounds of pinion only multiply that number by gear ratio = carrier preload my question is what should my carrier preload be with used bearings ? and should i use locktite on ring gear bolts and bearing caps ? thanks all for your help with my winter project if temperature matters i;m doing this in my basement work shop temps about 65 deg
install posi
- Thread starter jcelk
- Start date
I would loctite the ring gear bolts. I've never loctited the bearing cap bolts. Just torque them properly. As far as carrier preload, I've just put the small shims in, and leave the thickest shim until last and tap it in with a hammer. As long as you have to use a little force to put it in, the bearings are preloaded.
thats what i have read you adjust carrior preload by feel..... bracketchevy when you tap the biggest shim in i guess the carrior is fully seated ? being retire is great i got free time and i enjoy working on my cars not to mention no dumb boss.. i wonder why they have a formula for measuring carrior preload but no specs as what it should be. thanks all for your help
i got the rear out today now it;s in my basement workshop going to pull it apart monday
Used gears should have pinion rotational torque of 25-35 in/lbs. without the seal installed.
When pre-Loading the carrier bearings I always set it up two zero end play, then add .004-.006” more carrier shim for the preload. Be sure your bearings and races are lubed and they are in good condition - no pitting or race defacing.
When pre-Loading the carrier bearings I always set it up two zero end play, then add .004-.006” more carrier shim for the preload. Be sure your bearings and races are lubed and they are in good condition - no pitting or race defacing.
Used bearing pinion rotational torque should be 5-10 in-lb without the carrier installed.
Carrier preload is fine with 0.008-0.010 total interference. Need to set up the new carrer to obtain the backlash seen in the used gear setup (assuming it was in spec). That would be e.g. 0.004-0.005 shim thickness added to each side from the condition where the carrier has no play (e.g. can't fit a 0.001" feeler guage).
I'm doing one this week - new gears, old carrier, new bearings.
Last edited:
Similar threads
