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so this is what i got in the rear

This is a discussion on so this is what i got in the rear within the Drivetrain forums, part of the LSx Technical Help Section category; so i pulled my gears out this week and got a few questons. just curious. so im installing a set ...

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    Junior Member bbadassta96's Avatar
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    so this is what i got in the rear

    so i pulled my gears out this week and got a few questons. just curious. so im installing a set of 4:10s. This is the first thing i noticed no backlash at all. I mean 0. so i pulled out the carrier and there are no shims at all on either side. so i said wow! Started looking it over noticed one of the bearing is ate the hell up. So im kinda glad i started the rear gear change or it could have led to a bigger problem than i could have imagined. any one ever here of something like that before?

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    Senior Member bills98ta's Avatar
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    Wow !!! No shims... Never seen that before... Are you going to re-use that housing ? I'd consider looking for another.

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    Junior Member bbadassta96's Avatar
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    im specting the housing now. but i do have a back up

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    Senior Member bills98ta's Avatar
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    Guess you could pick up a housing spreader, to add some shims...

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    Junior Member bbadassta96's Avatar
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    im waiting on my install kit and ill be putting them in

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    Junior Member bbadassta96's Avatar
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    so i put it together last night for a tooth contact patter. this is what i got. i got some question but wanna know what you think about the pattern so far. let me know what you think?


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    Senior Member bills98ta's Avatar
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    I think you are OK. Get your backlash where you want it ? I set mine up around .008" - .010" cold...
    Anyone else want to chime in with there backlash set ups ???

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    Junior Member bbadassta96's Avatar
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    man thats what i thought. this is my problem. i tried shimming the carrier for my backlash adjustment but it wouldnt go. i got it to go in no shims at all but got the washers in, but it fought me the hole way. It had about .003 backlash, so what i think i need to do is get a case spreader. what do ya think? Im stumped. (o just for some more info. when i took the old gears out there was no shims on the carrier either just the pinon.)
    Last edited by bbadassta96; 01-21-2010 at 09:35 PM.

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    Moderator Cutlass's Avatar
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    Quote Originally Posted by bbadassta96 View Post
    man thats what i thought. this is my problem. i tried shimming the carrier for my backlash adjustment but it wouldnt go. i got it to go in no shims at all but got the washers in, but it fought me the hole way.
    The washers are the shims. .003 seems too tight. try swapping them side to side and see what the backlash is

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    Senior Member bills98ta's Avatar
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    If that doesn't work, do you have enough shims to eliminate the right washer and add a shim on the left ? But, ya, the washers are really, thick shims, and the one could be a different thickness than the other.

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    Junior Member bbadassta96's Avatar
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    Ya that's a good idea didn't think of that. I thought you had to use the thick washers too. But I'm finishing it up today will let u know the out come thanks guys

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    Junior Member bbadassta96's Avatar
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    Ok so I got it back together got Richmond gears n got .007 backlash thanks for all the help.

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    Junior Member bbadassta96's Avatar
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    ok so out for a drive and it sounds like the rear is winning on acceleration but quiet on coast. i gave it a hard accelerate and sounded like i heard a clunk but only once and never heard it again. like i said it had .007 backlash and the pics show the gear contact pattern.. just wondering what you guys thought

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    Junior Member bbadassta96's Avatar
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    o and the fluid i put in was valvoline synthetic 75-90 with the GM additive

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    Senior Member redbird555's Avatar
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    Richmonds usually r noisy but it could be that the backlash is too tight mine usually sits at .010. Better be safe than sorry.......On mine the factory shims didnt work anymore no matter the combo. I went out and bought adjustable shims they have an outter case and u add washers to the inside... Theyre about 40 bucks but worth it imo.

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    You want to be easy on the gears for the first 500 miles to set everything. Then pull the cover and check everything again and add new fluid.

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    Senior Member bills98ta's Avatar
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    I've never had a quiet rear...

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    Junior Member bbadassta96's Avatar
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    ya thats what i thought ya im going to do the break in thing to and check them after. thanks guys just getting info on them.

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    Junior Member bbadassta96's Avatar
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    Richmonds usually r noisy but it could be that the backlash is too tight mine usually sits at .010. Better be safe than sorry.......On mine the factory shims didnt work anymore no matter the combo. I went out and bought adjustable shims they have an outter case and u add washers to the inside... Theyre about 40 bucks but worth it imo.

    where did you get the adjustable shims from?

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    Junior Member bbadassta96's Avatar
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    so i was curious about the hum. jacked up the car its coming from what sounds to be the front pinion bearing. just curious what would it sound like if the crush sleeve wasnt crushed or if its to far crushed?

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