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Old 04-30-2009, 01:10 PM
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What type of differential oil

Hello guys,
I need your help.

I have 78 Chevy Monte Carlo with 2,29 rear end (the code on axle is 2 BH 0 66 1), I might be wrong on the ratio. There is also aluminum plate attached to one of the bolts saying "Limited slip differential oil".

Please let me know what type of oil I should use.

I am not in USA and I don't have access to all your oil brands and additives.

Here I can find Mobil, Castrol, Esso and some other world known brands.

Thank you for your help,
Ivo

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Old 04-30-2009, 01:46 PM
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Quote:
Originally Posted by rack
Hello guys,
I need your help.

I have 78 Chevy Monte Carlo with 2,29 rear end (the code on axle is 2 BH 0 66 1), I might be wrong on the ratio. There is also aluminum plate attached to one of the bolts saying "Limited slip differential oil".

Please let me know what type of oil I should use.

I am not in USA and I don't have access to all your oil brands and additives.

Here I can find Mobil, Castrol, Esso and some other world known brands.

Thank you for your help,
Ivo
The oil will say for Limited Slip on the container, if it doesn't, it isn't.

- Mobile 1 Synthetic LS 75W-90

- ESSO LS 80W-90 or LSA 85W-90

- Castrol Part Number 3015 in 80W-90

- You might also look for Silkolene BOA90LS in your part of Europe

These are all Limited Slip rated oils, however some people report issues with Mobil 1 in GM Posi-Traction. A solution that would help and also make it so you can brew your own LS oil from regular hypoid oil is the GM LS additive part number 1052358 if you can find it.

Bogie
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Old 05-01-2009, 01:09 AM
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Thank you very much Bogie,
You helped me a lot.
Best regards,
Ivo
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Old 05-01-2009, 06:38 AM
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I had a chatter problem with Mobil 1 gear oil in a Ford 8 inch differential posi. The posi was a fresh rebuild with posi plates soaked in Mobil oil

I added the Ford posi lube additive , the chatter problem stopped
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Old 05-01-2009, 08:08 AM
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I had the same problem as Crosley, but with Royal Purple synthetic gear oil, added a bottle of Ford additive and it went away. In spite of what the advertisement says on the bottle of oil you may still have to add the Ford product.

Vince
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Old 05-02-2009, 01:31 AM
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Hi Guys,
Thank you for responses.

Do you mean that no matter what oil I use I would be better of with GM additive?

I find it on the Internet for around $10, it is not a big deal, just have to get it here

Regards,
Ivo
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Old 05-02-2009, 07:53 AM
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You would just have to try it with the oil you are using and see if the additive is needed. Note: don't get any of that stuff on you, it stinks to high heaven .

Vince
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