Powder coated Dana 44 case
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Powder coated Dana 44 case
After reassembling the case the differential makes noise on acceleration (whirring), and howls.
Did the powder coating do something to the case? All new bearings and seals were installed.
Did the powder coating do something to the case? All new bearings and seals were installed.
Melting Slicks
Joined: Nov 2008
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Powder coating the dana 44 case would not affect it at all.
Team Owner
Joined: Aug 2005
Posts: 34,988
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From: Riverside County Southern California
Co-winner 2020 C4 of the Year - Modified
2018 Corvette of Year Finalist
2017 C4 of Year
2016 C7 of Year Finalist
St. Jude Donor '09 thru '20
If it is noisy, the gears migh have been installed incorrectly. Did you DIY your differential?
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The dealer is claiming the ring and pinion are worn.
I spoke to someone at Corvette Parts, and they claim that even if the the diff were reassembled with the shims, etc. in the same places the heat from powder coating could have affected the alignment of the ring and pinion.
What places would you recommend that could give me an honest diagnosis of what is wrong with this thing? Has anyone ever had a rebuild done by corvette parts online?
Last edited by lees02ws6; Oct 16, 2011 at 10:35 PM.
Melting Slicks
Joined: Nov 2008
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I didn't the diff was disassembled by the local GM dealer, powder coated by a local shop, and then reassembled by the GM dealer.
The dealer is claiming the ring and pinion are worn.
I spoke to someone at Corvette Parts, and they claim that even if the the diff were reassembled with the shims, etc. in the same places the heat from powder coating could have affected the alignment of the ring and pinion.
What places would you recommend that could give me an honest diagnosis of what is wrong with this thing? Has anyone ever had a rebuild done by corvette parts online?
The dealer is claiming the ring and pinion are worn.
I spoke to someone at Corvette Parts, and they claim that even if the the diff were reassembled with the shims, etc. in the same places the heat from powder coating could have affected the alignment of the ring and pinion.
What places would you recommend that could give me an honest diagnosis of what is wrong with this thing? Has anyone ever had a rebuild done by corvette parts online?
Need to perform a gear pattern test.
Need GM gear marking compound or similar.
Prussion Blue from Napa will work OK too.
I rebuild all rear diffs.
Including C4's.
Brian
Drifting
Joined: Oct 2004
Posts: 1,477
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From: Hawaii
I spoke to someone at Corvette Parts, and they claim that even if the the diff were reassembled with the shims, etc. in the same places the heat from powder coating could have affected the alignment of the ring and pinion.
What places would you recommend that could give me an honest diagnosis of what is wrong with this thing? Has anyone ever had a rebuild done by corvette parts online?
What places would you recommend that could give me an honest diagnosis of what is wrong with this thing? Has anyone ever had a rebuild done by corvette parts online?
If its the same guy, not sure you want to be dealing with him.
Melting Slicks
Joined: Nov 2008
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I had a 1970-1/2 Trans Am - Camaro 12- bolt Eaton 8-7/8" rear housing powdercoated in the past.
Had it powdercoated Gloss Black by Sun Valley Powder Coating in Bloomington, Illinois back in 1997.
Was going to use it for my 70-1/2 T/A.
I ended up selling that rear to an old friend with a 1981 Camaro.
He ran low 9's on it.
Used a 9310 nickle Richmond Gearset for it.
Moser 33- spline axles & matching spool.
4.10 gears.
He street drove his car back then also.
He switched a Strange aluminum 3rd member 9 inch.
Running mid 7-s with a Big Block Chevy & Pro- Charger blower.
Powder coating never hurt that 12- bolt housing.
Actually had it powder coated twice.
1st time around there was blemishes in the finish.
I requested it to be stripped clean & re powdercoated.
2nd time around, it came out flawless.
It was in the baking oven 2 times.
That 12 - bolt rear setup perfect.
Picture perfect Drive & Coast patterns.
Never tweaked the housing or sprung it from the baking heat operation(s).
BR
Had it powdercoated Gloss Black by Sun Valley Powder Coating in Bloomington, Illinois back in 1997.
Was going to use it for my 70-1/2 T/A.
I ended up selling that rear to an old friend with a 1981 Camaro.
He ran low 9's on it.
Used a 9310 nickle Richmond Gearset for it.
Moser 33- spline axles & matching spool.
4.10 gears.
He street drove his car back then also.
He switched a Strange aluminum 3rd member 9 inch.
Running mid 7-s with a Big Block Chevy & Pro- Charger blower.
Powder coating never hurt that 12- bolt housing.
Actually had it powder coated twice.
1st time around there was blemishes in the finish.
I requested it to be stripped clean & re powdercoated.
2nd time around, it came out flawless.
It was in the baking oven 2 times.
That 12 - bolt rear setup perfect.
Picture perfect Drive & Coast patterns.
Never tweaked the housing or sprung it from the baking heat operation(s).
BR
Team Owner
Joined: Aug 2005
Posts: 34,988
Likes: 515
From: Riverside County Southern California
Co-winner 2020 C4 of the Year - Modified
2018 Corvette of Year Finalist
2017 C4 of Year
2016 C7 of Year Finalist
St. Jude Donor '09 thru '20
Another great deal by the stealership. C6 owners hate the stealership with passion.
I bet "the guy" just put all components in together without dialing up, backlash etc. Lets hope he, at least, used a torque wrench.
Why did you powder coated the pumpkin? Are you into Vette Car Shows?
I bet "the guy" just put all components in together without dialing up, backlash etc. Lets hope he, at least, used a torque wrench.
Why did you powder coated the pumpkin? Are you into Vette Car Shows?
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Melting Slicks
Joined: Nov 2008
Posts: 2,765
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Another great deal by the stealership. C6 owners hate the stealership with passion.
I bet "the guy" just put all components in together without dialing up, backlash etc. Lets hope he, at least, used a torque wrench.
Why did you powder coated the pumpkin? Are you into Vette Car Shows?
I bet "the guy" just put all components in together without dialing up, backlash etc. Lets hope he, at least, used a torque wrench.
Why did you powder coated the pumpkin? Are you into Vette Car Shows?
He needs to perform a Gear pattern test.
Then post results here on c4 with very high quality pics for me to observe close up.
Many tell tale signs of what is wrong.
I know exact from looking 1st hand.
Melting Slicks
Joined: Oct 2005
Posts: 3,178
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From: Daleville Indiana
St. Jude Donor '08
http://corvettepartsonline.blogspot.com/
If its the same guy, not sure you want to be dealing with him.
If its the same guy, not sure you want to be dealing with him.
If its the same guyRUN, RUN now and never look back.
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It's not a vette, it's yet another non-vette, running vette suspension. So, appearance is an important part of the package.
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http://corvettepartsonline.blogspot.com/
If its the same guy, not sure you want to be dealing with him.
If its the same guy, not sure you want to be dealing with him.
Thanks again.
Found this too
http://florida.arrests.org/Arrests/Carl_Shuhi_1270707/
Last edited by lees02ws6; Oct 17, 2011 at 12:54 PM.
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Apparently that's Carl Shuhi of
CORVETTEPARTSONLINE.NET
VETTEPARTSONLINE.COM
VENICIAN VETTE PARTS
FLORIDA CALIPER MANUFACTURERS
FLORIDA PRECISION CALIPERS
Caliper 2000
He's apparently been the subject of many reports to Better Business Bureaus, and State Attorney Generals.
CORVETTEPARTSONLINE.NET
VETTEPARTSONLINE.COM
VENICIAN VETTE PARTS
FLORIDA CALIPER MANUFACTURERS
FLORIDA PRECISION CALIPERS
Caliper 2000
He's apparently been the subject of many reports to Better Business Bureaus, and State Attorney Generals.
Safety Car
Joined: Apr 2001
Posts: 3,525
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From: Houston TX
Just an FYI on some items posted above....
Powder coating a steel/cast iron differential is considerably different than powdercoating an aluminum D44 case. 5000 series alloy (and even 2014, less we mention the 7000 series) will definitely affect the strength due to the bake after the powder application event. Will it be enough to cause it to break immediately? Only time will tell.
The increased temps that aluminum experiences during such events not only causes a change in age, temper, and strength, but they may also cause things to "move" and tolerances to change. Not critically important in a large cast aluminum part, but much more important in a fully machined aluminum piece.
Powder coating a steel/cast iron differential is considerably different than powdercoating an aluminum D44 case. 5000 series alloy (and even 2014, less we mention the 7000 series) will definitely affect the strength due to the bake after the powder application event. Will it be enough to cause it to break immediately? Only time will tell.
The increased temps that aluminum experiences during such events not only causes a change in age, temper, and strength, but they may also cause things to "move" and tolerances to change. Not critically important in a large cast aluminum part, but much more important in a fully machined aluminum piece.
5th Gear
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5th Gear
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Carl Shuhi
Yes, this is Carl Shuhi. He now lives at 124 SE 25th Ave. Boynton Beach, Fl 33435. Please feel free to send him a letter letting him know of your displeasure. Spread the news.
Apparently that's Carl Shuhi of
CORVETTEPARTSONLINE.NET
VETTEPARTSONLINE.COM
VENICIAN VETTE PARTS
FLORIDA CALIPER MANUFACTURERS
FLORIDA PRECISION CALIPERS
Caliper 2000
He's apparently been the subject of many reports to Better Business Bureaus, and State Attorney Generals.
CORVETTEPARTSONLINE.NET
VETTEPARTSONLINE.COM
VENICIAN VETTE PARTS
FLORIDA CALIPER MANUFACTURERS
FLORIDA PRECISION CALIPERS
Caliper 2000
He's apparently been the subject of many reports to Better Business Bureaus, and State Attorney Generals.
