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Post by SilverZ28 on May 4, 2005 13:14:17 GMT -5
Well, i made a thread on ls1tech, but i thought id breing it over here too, i am trying to install my 3.73's and have run into a couple problems... i cannot get the backlash right because when i put to the bearing caps on, even just 1/4 turn past hand tight, the thing will not spin... i have been wrestling with this god awful thing for a few days now with no progress, wondering if any of you have any ideas?
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Post by AAron on May 4, 2005 17:54:54 GMT -5
good article i found about do it yourself rearend rebuild. www.fullsizechevy.com/fscu/axletech/so they spin at hand tight? if so id almost wanna say that you have the wrong amount of spacers on the pinion. |
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Post by JoshuaJames on May 5, 2005 21:16:57 GMT -5
are you still working on the gear set or was the pinion depth the problem?
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Post by SilverZ28 on May 6, 2005 1:08:36 GMT -5
UPDATE: Well, sometimes it helps to not be too cautious... i did not get the rear pinion race fully seated so the pinion crowded the ring gear WAY too much... since then, i have the gears installed and they seem to be working fine with little to no whine... im happy to be a 19 year old with no rear end experience installing gears successfully.... so far... lol and the new diff makes driving very much more fun
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Post by AAron on May 6, 2005 11:22:06 GMT -5
what fluid you running?
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Post by SilverZ28 on May 8, 2005 15:10:13 GMT -5
I am using the mobil 1 75-90w and the lsd additive... guy i bought the diff from reccomended that stuff....
Now i have a problem of whine on deceleration.... it is barely noticeable until the car is in gear and slowing down.... is this backlash or pinion depth???
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Post by AAron on May 8, 2005 17:59:46 GMT -5
that isnt that bad it is usually the back side of the gears and sometimes that is difficult to get just right. but i would guess it is pinion depth.
but it is finals week and my brain is fried
edit: also if it is just a little whine it usually wont hurt. but use some thicker oil and it will quiet down.
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Post by SilverZ28 on May 9, 2005 2:10:37 GMT -5
I think once i get a new rear window installed, ill drain it, check backlash and maybe re-shim it accordingly... haveing torn through the thing a buncha times, this will be a much faster job than before...lol maybe it will only take a day or two...  |
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Post by AAron on May 9, 2005 8:19:43 GMT -5
the first on is always the hardest.
edit: i lied the one with problems like reshiming 3 times, messing up the crush sleave, messing up the backlash shims, wondering why it is called backlash while drinking a beer and cursing at it...... no that is the worst one.
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Post by SilverZ28 on May 9, 2005 16:03:14 GMT -5
LOL, i hear that, wish i woulda had some beer when i first started... def gonna kick back with one this time around... Ill prolly let the old thing cool down a bit before i go tearing through it... i think i may have way too uch backlash... seems like the pinion has way too much play in it... Even if i have to re-do everything like pinion depth... most of my time was spent chaning out bearing races...lol
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Post by AAron on May 10, 2005 15:22:04 GMT -5
LOL, i hear that, wish i woulda had some beer when i first started... def gonna kick back with one this time around... Ill prolly let the old thing cool down a bit before i go tearing through it... i think i may have way too uch backlash... seems like the pinion has way too much play in it... Even if i have to re-do everything like pinion depth... most of my time was spent chaning out bearing races...lol yeah. it is almost a feel for things that you have to get. it is hard to say exact problem when your not there. |
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Post by SilverZ28 on May 11, 2005 14:14:39 GMT -5
yeah. it is almost a feel for things that you have to get. it is hard to say exact problem when your not there. I def hear that, the whine is only on decel, every once and a while it happens when coasting... i might tear into it again, but i can live with a little whine, i hear decel whine is hard to get rid of as well... i might move my carrier in on the pinion and ithgten up backlash, see if that works, but im not sure yet... |
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Post by AAron on May 12, 2005 14:53:22 GMT -5
if it is just a small amount put some thicker oil in it and be done with it. i had a 9" in my '01 and 80-140w and never heard a peep out of it. not the best stuff for racing. but the rearend leaked so that suff leaked out slower ;D
but in houston it never gets very cold so i could go that thick. you might try just staight 90w with the addative. it wont be much thicker that 75-90w but its viscocity dosent change as much as the 75-90w
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Post by SilverZ28 on May 13, 2005 20:39:52 GMT -5
I might do that, when i get around to ripping it open to re-check the backlash, if the backlash is the problem, then ill to that and drop in straight 90w with the additive
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Post by AAron on May 14, 2005 16:54:35 GMT -5
let us know how it goes
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Post by turtle on May 14, 2005 18:38:16 GMT -5
I've had the same thing happening to my car since I had my 373's installed, not real loud and only on decel. and only when its in gear. A friend told me it wasn't anything to worry about. Should I worry and if so what kind of damage could it cause?  |
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Post by SilverZ28 on May 15, 2005 21:01:10 GMT -5
I am gonna tear mine aparts tommorrow after i get my wondows tinted, ill let you know if i shredded anything, but ive driven the car for about a week, its run fine, the whine has not gotten worse, but when the car gets hot it seems to get a little quieter.... hence my theory of too much backlash...
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Post by AAron on May 15, 2005 23:50:55 GMT -5
I've had the same thing happening to my car since I had my 373's installed, not real loud and only on decel. and only when its in gear. A friend told me it wasn't anything to worry about. Should I worry and if so what kind of damage could it cause? shouldnt be much of a problem. i've heard some whines and the gears never had a problem. that is why they have tolerances. if you are real concerned then pop the cover off and check them. all it costs to do that is the money for the fluid, and gasket. |
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Post by turtle on May 16, 2005 11:47:03 GMT -5
shouldnt be much of a problem. i've heard some whines and the gears never had a problem. that is why they have tolerances. if you are real concerned then pop the cover off and check them. all it costs to do that is the money for the fluid, and gasket. Thanks I think I'll do that later this week( better safe than stranded, right?). Oh and Silver let me know what you find. |
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Post by SilverZ28 on May 17, 2005 18:50:33 GMT -5
Will do, i have a buddies birthday tonight so ill prolly wait till im lazy tomorrow to get some fluid, and since i have a spare gasket ill be set to rip into the old girl for old time sake...lol
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Post by SilverZ28 on May 19, 2005 14:46:51 GMT -5
I opened it up... backlash was good, but my pinion was STILL LOOSE!!!! i am retarded... lol the wear pattern on the gears is good, except with the loose pinion it covers almost the entire face of the tooth.... d@mn, looks like im gonna be backing off the pinion nut, tapping out the pinion and starting over so i get a clean start... d@mn, i guess it was what i figured, even though backlash woulda been easier...lol
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Post by SilverZ28 on May 19, 2005 19:27:44 GMT -5
well it took a really really really large amount of torque in order to fully get the pinion tight, but it is done, and the new gears have never been quieter.... For now at least....lol
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Post by turtle on May 20, 2005 19:33:17 GMT -5
I opened it up... backlash was good, but my pinion was STILL LOOSE!!!! the wear pattern on the gears is good, except with the loose pinion it covers almost the entire face of the tooth. I know this is probibly a stupid question but I'll ask it anyway. How bad is it when your pinion is loose? (I don't know sh!t about rears). I only ask cause I've been driving my car for over a year since I had my 373's put in, and if my problem is the same one you had, what kind of damage should I expect( I know I said I was gonna check my rear this week but I've been side tracked by work and personel obligations). Am I gonna have to plan on buying new gears? Or am I just being parranoid.  |
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Post by AAron on May 21, 2005 21:09:01 GMT -5
I know this is probibly a stupid question but I'll ask it anyway. How bad is it when your pinion is loose? (I don't know sh!t about rears). I only ask cause I've been driving my car for over a year since I had my 373's put in, and if my problem is the same one you had, what kind of damage should I expect( I know I said I was gonna check my rear this week but I've been side tracked by work and personel obligations). Am I gonna have to plan on buying new gears? Or am I just being parranoid. the pinion being loose is pretty rare. usually just some of the adjustment. and if it is minor then it shouldnt be that bad. nothing to worry about till you get it apart. |
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Post by SilverZ28 on May 24, 2005 17:03:29 GMT -5
From what i saw on my gears, if the pinion is a little loose there would prolly be very little damage, but once you fix it, with the wear patterns on the gears being so deep, the whine might only be a little less noticeable... Easy way to tell if it is loose is to jump under there and check it for endplay, it would be pretty obvious if it was loose...
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