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Old 07-13-2011, 01:22 AM   #1
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Got productive over the last two days

Decided to swap in some frpp 4.10 gears and rebuild the pumpkin with new clutch packs.






after about 10 tries to correctly get decent pinion depth, this is what i got.





Oh and i found out the hard way that pinion bearings are not made equal, i had a perfect pattern with the old bearings and crush sleeve. Once i installed some new timken bearings, they threw everything off, and i measured them out to be almost .02 in taller than the stock bearing, so i tried to compensate for that as much as possible.

I only drove like 15 miles so far on them, and i got zero noise on accel and cruising at a constant speed. However, i got a slight whine under decel and can only hear it plainly with the radio off and windows up.

not bad for my first ever install.
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Old 07-13-2011, 08:56 AM   #2
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Nicely done. I had my 4.10s installed professionally because I am not as brave as you. I have a slight whine on decel only also. Once you het them broken in, let me know how you like them. I love mine.
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Old 07-13-2011, 10:26 AM   #3
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Re: Got productive over the last two days

That is one job I would not try good job.
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Old 07-13-2011, 10:37 AM   #4
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Re: Got productive over the last two days

nice, i would consider changing the fluid after a few miles
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Old 07-13-2011, 11:22 AM   #5
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Re: Got productive over the last two days

True that^^ I didnt do that with mine and after 800 miles or so the rear started clicking like there was something wrong with the spider gear, but what it was is the fluid broke down inside the pumpkin. which took away its lubrication properties. i guess where is some sort of coating on the parts that comes off within the break in period and it doesnt mix well this the fluid.
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Old 07-13-2011, 11:41 AM   #6
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Re: Got productive over the last two days

It's always a good idea to change the rear end oil after a major job like that ater a few miles just for that reason.
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Old 07-13-2011, 04:49 PM   #7
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Quote:
Originally Posted by wereKEV
It's always a good idea to change the rear end oil after a major job like that ater a few miles just for that reason.
Wish I knew how to do this, because I am certain mine probably needs it
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Old 07-13-2011, 06:01 PM   #8
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Re: Got productive over the last two days

I plan on changing the fluid out after a couple hundred miles, i need to reseal my diff girdle anyways, haha. So far i put 50 city driven miles on it and no new noises, i am excited to actually be able put my car into 5th gear at 35mph with no bucking, haha.


Thanks guys for the comments, the install isn't really that hard, the only trouble i had was getting near the correct pinion depth i need.
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Old 07-13-2011, 06:17 PM   #9
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Re: Got productive over the last two days

Quote:
Originally Posted by jbanks View Post
Wish I knew how to do this, because I am certain mine probably needs it
If you have the stock cover, all you gotta do is break the seal of the diff cover by unbolting it from bottom up and let it drain. Then reseal the diff cover using black rtv and make sure both surfaces are real clean, then fill using the fill hole on the driver's side front of the diff housing.
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Old 07-14-2011, 11:18 AM   #10
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Re: Got productive over the last two days

easy peasy lemon squeezy.
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