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Old 02-14-2011, 06:17 AM
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9+ rearend trouble

We had a new 9" rearend built last year,at first it was fine but started to make noise,not howling but pretty bad rumble and the builder found carrier bearings that looked like in this timken bearing site:
http://www.timken.com/en-us/products...ments/6347.pdf
Those misalignment pics are what i`m looking.not that bad but similar wear.
The question is have anyone had any trouble on those 9+ cases?

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Old 02-14-2011, 09:50 AM
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Have to ask, who built the 9" rear axle and what brand parts were used? FWIW there is generally not a problem with 9" rear axles.

Vince
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Old 02-14-2011, 11:19 AM
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I agree with Vince. It's hard to mess up a 9 in. It's possible that the side adjusters were not tightened down enough. Generally these need to be pretty tight as this is where the so called preload comes from. The big race car one I just did replaces these with shims and call for .005 per side preload. It's pretty dramatic how tight this is on a really rigid housing. Top loader by the way.
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Old 02-14-2011, 11:01 PM
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Local speedshop owner built this rearend and hen has built them many times before,parts used were those 9+,ring and pinion are Allstar,not sure about the bearings but i think they were timken
http://www.new9inch.com/
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Old 02-15-2011, 07:59 AM
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Damn Timo;

Sorry to hear you're working through more delays. The guys here at Hotrodders.com will help you out. Did you get my trans from your friend yet?
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Old 02-15-2011, 10:02 AM
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If I had the case here I could lay it out on my surface plate and see if it was machined correctly. See if someone near you can check it to see if the bearing bore is perpendicular to the pinion bore. Also check to see if the bearing bore is straight through and round. Sometimes a bad part makes it through the quality inspections and gets into the hands of the consumer.
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Old 02-15-2011, 11:28 PM
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Quote:
Originally Posted by AutoGear
Damn Timo;

Sorry to hear you're working through more delays. The guys here at Hotrodders.com will help you out. Did you get my trans from your friend yet?
Hi Nate,
no not yet,containership left 21:st of january and it`s usually 4-6 weeks to get in here.

this rear is from my brothers camaro,my strange rearend is allso in the sea coming,i hope that is ok in the first time

Last edited by TimoFinn; 02-15-2011 at 11:46 PM.
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Old 02-15-2011, 11:45 PM
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Quote:
Originally Posted by big gear head
If I had the case here I could lay it out on my surface plate and see if it was machined correctly. See if someone near you can check it to see if the bearing bore is perpendicular to the pinion bore. Also check to see if the bearing bore is straight through and round. Sometimes a bad part makes it through the quality inspections and gets into the hands of the consumer.

The builder is going to put new bearings to it with more preload,do you think this will cure it?
I think i will get it to my friend to look at it or to go to other shop.
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Old 02-21-2011, 12:10 AM
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Well...my friend took it apart and pinion bearings were worn and misaligned too.metal shavings inside the traction lock diff.
we are going to go to the speedshop and have a serious talk with that builder
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Old 02-21-2011, 05:46 AM
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As long as you are headed to the the speed shop have them replace the crush sleeve with a spacer. These are usually shimmed to the correct preload but I make my own and machine them right to the size required.

I just put a new ring and pinion in a Strange top loader and the R&P came with a spacer that needed machining at installation
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Old 02-21-2011, 06:02 AM
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There were that crush sleeve with a couple of shims,my friend told that this is a no no.if the crush sleeve is crushed too much it should be replaced with new one or with a spacer.
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Old 02-21-2011, 08:17 AM
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The crush sleeve really does not need to be replaced every time, just torque it down to the proper spec. If you are replacing the pinion bearings then use a new crush sleeve to preload the bearings.

Vince
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