C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

3rd TIME sETTING-uP D44 REAR GEARS

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Old Mar 10, 2005 | 05:38 PM
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Default 3rd TIME sETTING-uP D44 REAR GEARS

Wish me luck. We're going to have the diff shop try one more time. We are taking out the Richmond's which we could never make quiet.
We're installing new Super Dana 44 3.73s and new rear diff oil. Do any of you have the Spicer Dana 44 3.73s ? Do you have much gear noise?
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Old Mar 10, 2005 | 05:40 PM
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Your 8th thread on this. Gonna have to start calling you Darth Junior.
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Old Mar 10, 2005 | 05:43 PM
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Default How about diff Vader ?

The "force" definitely hasn't been with this modification...$1500 later.
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Old Mar 10, 2005 | 07:22 PM
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Sounds like you may need a new shop. I have the Dana Spicer big pinion 3:73s.
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Old Mar 12, 2005 | 06:26 AM
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Talk to Kenny at Tom's Differentials. He has been been doing almost nothing but these rearends (Corvettes) for over 20+ years with much success. The phone # is (562) 634-8431. If he can't help........
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Old Mar 12, 2005 | 12:46 PM
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Originally Posted by vetteresearcher
Wish me luck. We're going to have the diff shop try one more time. We are taking out the Richmond's which we could never make quiet.
We're installing new Super Dana 44 3.73s and new rear diff oil. Do any of you have the Spicer Dana 44 3.73s ? Do you have much gear noise?

I have only installed one set of gears that were other than DANA gears. But they were quiet as well. The last set I did was a set of 4.10s that were originally Viper gears but these were also made by DANA and were quiet as well. Certain Richmond gears are a little noisey and its not just with D44 or D36 pumpkins. I have had this problem with other GM axles such as the F body 10 bolts. However I was always forwarned about the problem and advised the customer well before the installation takes place. Its cover your azz in these cases as no one wants to do the job over for free.
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Old Mar 12, 2005 | 10:17 PM
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Assumming bearing preload,pinion depth is ok. Pinion bearing preload is crucial, any play or questional bearings can cause noise. Also Some of us old timers have been known to set the backlash as much as .020"-.022" this can help quiet things down. .006-.009" is pretty tight especially if the carrier has runnout. If you have .006 backlash and .003 runnout [which should be acceptable] you could be as tight as .003 in spots around the ring gear. Gears are usually noisey from being too tight.
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Old Mar 13, 2005 | 08:38 AM
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Originally Posted by Ramrod92
Sounds like you may need a new shop. I have the Dana Spicer big pinion 3:73s.
I have the same from Randy's Ring and Pinion. The Pinion gear is a D60 and the Ring gear is a D44. Very stout indeed, and mine are dead quiet.

I had a local driveline shop do the gear install and then my mechanic put the pumpkin back in the car.

Mike
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Old Mar 13, 2005 | 11:16 AM
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do i have to grind pumpkin to use spicier gears? 3.73s
also
where can i get those?
are they better than percision?
thanks alot your friend
Sean
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Old Mar 14, 2005 | 09:12 AM
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Look up Randy's Ring and Pinion on Google and give them a call... they know exactly what to get you. You will also want to get the install kit for another $100 or so (shims, bearings, etc)

Mike
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