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Camaro ZL1 Rear Diff Fluid Difference #5451132 06/11/20 08:41 AM
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puppykat33 Offline OP
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It has came to my attention that there are 2 different bottles of rear diff fluid with the same part number 10-4034. One of the bottles has GL5 on it and the other one doesn't. Does anyone know if it is the same fluid and different bottles. i have searched here and the corvette forums but no definitive answer was given other that GL5 is a pressure rating.

OEM part number is= 88862624.

There’s a similar part number= 1#88862624.

Bottles looks almost the same except the 1# part number bottle doesn’t say GL5 on it.

Both carry the same ACDELCO number 10-4034. I wonder if there’s a difference?

1#88862624_.jpg88862624.jpg
Re: Camaro ZL1 Rear Diff Fluid Difference [Re: puppykat33] #5451159 06/11/20 09:05 AM
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Rand Offline
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just a different label would be my guess.


2019 Jeep Cherokee Trailhawk 2.0T
2020 Hyundai Elantra "Value Edition"
Re: Camaro ZL1 Rear Diff Fluid Difference [Re: puppykat33] #5451171 06/11/20 09:12 AM
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Kira Offline
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GL5 = a "pressure rating"?
I "always thought" gear oils had GL-4 or GL-5 ratings depending on whether the product had sulphur compounds in it (GL-4) or not (GL-5).
The synchros in manual transmissions are bronze and are eroded by the sulphur in GL-4 lubes.

I trust I'm correct here.
MODS: Please delete this if I'm wrong.

Re: Camaro ZL1 Rear Diff Fluid Difference [Re: Kira] #5451182 06/11/20 09:23 AM
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puppykat33 Offline OP
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it may be a sulphur rating i dont know.

Re: Camaro ZL1 Rear Diff Fluid Difference [Re: puppykat33] #5451235 06/11/20 10:12 AM
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Snagglefoot Offline
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GL-5 is for hypoid gears which is what you have.

https://www.oilspecifications.org/api_gos.php

The bottle with GL-5 is the just a change in the label. Both are GL-5.




Last edited by Snagglefoot; 06/11/20 10:12 AM.

If you want the job done right......do it yourself.
Re: Camaro ZL1 Rear Diff Fluid Difference [Re: Snagglefoot] #5451242 06/11/20 10:18 AM
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puppykat33 Offline OP
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Ok, that is what I figured. Thank you for the reply

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