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Modified Tech Discussion Forum for Tech related discussion for Modified XJ's and MJ's.

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  #1  
Old June 13th, 2007, 12:18
IntrepidXJ's Avatar
IntrepidXJ IntrepidXJ is offline
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HP D30 Pattern Check

Here's where I stopped at last night. Give me your opinions. This rig will see a lot of on-road and off-road driving.

backlash is .008







more pictures here if you need them, but some are blurry:

http://myxj.net/g2/v/2000_Build/axles/d30pattern/

I'm thinking the pinion might be a tad too close.....what you think?
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  #2  
Old June 13th, 2007, 12:53
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Re: HP D30 Pattern Check

That will work fine run it.
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  #3  
Old June 13th, 2007, 12:55
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Re: HP D30 Pattern Check

looks pretty close to perfect. good job!
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  #4  
Old June 13th, 2007, 13:01
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Re: HP D30 Pattern Check

Gear change or you blew the old set?
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  #5  
Old June 13th, 2007, 13:06
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Re: HP D30 Pattern Check

You're right the pinion is a little on the close side but it's not enough to be worth the trouble of changing it.
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  #6  
Old June 13th, 2007, 13:07
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IntrepidXJ IntrepidXJ is offline
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Re: HP D30 Pattern Check

Quote:
Originally Posted by RyanM
Gear change or you blew the old set?
gear change in my 2000.......going to 32's and switching from 3.55's to 4.56's
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  #7  
Old June 13th, 2007, 13:08
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IntrepidXJ IntrepidXJ is offline
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Re: HP D30 Pattern Check

Quote:
Originally Posted by jeeperjohn
You're right the pinion is a little on the close side but it's not enough to be worth the trouble of changing it.
yeah, that's kinda the way I was leaning.......but i can be a little too anal about these things sometimes.

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  #8  
Old June 13th, 2007, 13:10
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Re: HP D30 Pattern Check

looks good to me
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  #9  
Old June 13th, 2007, 13:13
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MudDawg MudDawg is offline
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Re: HP D30 Pattern Check

Looks about identical to the last 30 I set up....runs nice and quiet too. run it.
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  #10  
Old June 13th, 2007, 13:19
Stumpalump Stumpalump is offline
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Re: HP D30 Pattern Check

Setting a ring and pinion is like doing body work. You can sand and fill and look and sand and fill forever but at some point you have to say I'm done.
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  #11  
Old June 13th, 2007, 15:46
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Re: HP D30 Pattern Check

It's sitting a little deep, but still runnable for a front.
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  #12  
Old June 13th, 2007, 20:17
RCP Phx RCP Phx is offline
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Re: HP D30 Pattern Check

The pattern doesnt look bad as shown,but what I dont like is the backlash.I think thats way to loose for a D30.Maybe Rawbrown will chip in with some comments!
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  #13  
Old June 13th, 2007, 20:23
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Re: HP D30 Pattern Check

Quote:
Originally Posted by RCP Phx
The pattern doesnt look bad as shown,but what I dont like is the backlash.I think thats way to loose for a D30.Maybe Rawbrown will chip in with some comments!
.006 - .010 is spec......i shot for the middle........why do you think it's too loose?
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  #14  
Old June 13th, 2007, 20:28
RCP Phx RCP Phx is offline
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Re: HP D30 Pattern Check

Specs are just targets,not really developed for HP but the long run(who cares in a stock vehicle).The gears will open up as they break in,I always shoot for .004"-.006" on a D30.
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  #15  
Old June 13th, 2007, 20:50
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Re: HP D30 Pattern Check

I shoot for .006. You want on the tight side when gears are new. Like RCP Phx said the backlash will open up after it's broken in. But .008 isn't bad. Again, this is on the front so it's not important for it to be "perfect".
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