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Chevy Forum: Mixing oil and a dust cover
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  #1  
Old 05-14-2018, 06:25 PM
Jediguy Jediguy is offline
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Default Mixing oil and a dust cover

Hi all,

2 questions regarding my 2001 Chevy Suburban 1500 5.3L.

1) I just changed the oil and noticed after all the oil was drained that I had mistakenly bought 5w-20 instead of 5w-30.

In total I used 6 qts: 5qts of 5w-20 and 1 qt of 5w-30...

Is mixing oil like this okay?

I've always used 5w-30, will the truck be alright with the 5w-20?

2) I notice when draining my oil that a dust cover was missing from the transmission.

Could someone please tell me what this part is so I can replace it?

I notice a large gear is exposed due to this missing cover, could this lead to issues down the line if I don't replace it? I'm trying to understand if it is urgent.

A photo is attached.

Thank you so much for any help you can offer
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  #2  
Old 05-15-2018, 08:42 AM
zora zora is offline
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Default Re: Mixing oil and a dust cover

on an older engine going to a thinner oil is probably not the best thing to do. If it was my engine I would just change the oil again.
can you provide more information on the transmission, automatic, manual, 4wd, 2wd, etc. It looks like an inspection cover on the bell housing
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Old 05-15-2018, 07:02 PM
Jediguy Jediguy is offline
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Default Re: Mixing oil and a dust cover

Thanks Zora!

Exactly what I needed to hear, I'm just gonna bite the bullet and buy another 6 qts of oil.

It is an automatic 2wd transmission.
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Old 05-16-2018, 08:34 AM
zora zora is offline
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Default Re: Mixing oil and a dust cover

I believe the part you are missing is #8 in the diagram. It is still available new from any GM dealer but take the picture with you so the dealer parts department can confirm that is the correct part.
https://www.tonkinonlineparts.com/sh...category=22526
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Old 05-22-2018, 11:16 PM
Jediguy Jediguy is offline
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Default Re: Mixing oil and a dust cover

Hey just want to say thanks again Zora! I really appreciate your help.

I switched out the oil no problem and then found the part you suggested for less than $6 on Amazon, was here in 2 days and it fit like a charm.

If anyone reading this is looking for this part this the one I bought.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
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