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Post Info TOPIC: 12 bolt & M20 oil ?


Canadian Poncho Superstar!

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12 bolt & M20 oil ?


need to know what is the best lube to put in my rebuilt M20 and rebuilt 12 bolt posi. must be some oils out there that don't need additives 



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Poncho Master!

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80/90 weight. I believe is what is specified. For the 12 bolt posi I put 80/90 in with delco friction modifier.

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Eric - Regina, SK

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Guru

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for the m20 i recommend Delco GL 4 gear oil (special order at any GM dealer)......anything else eats up the brass in your trans.....the 12 bolt 80w90 Valvoline (works great in my ride)

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bob lewis


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If it's a posi, the GM specific posi oil (sorry I can't get you tell part number at the moment ) and no additive needed if you use that. For the Muncie 80/90 works great except in January!

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1966 Strato Chief 2 door sedan 283 "survivor"


Canadian Poncho Superstar!

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For the new 12 bolt, any popular brand name 80/90, but non synthetic only.

And the wee bottle of the GM friction modifier.

M51765280.jpg

Or the All-in-one GM stuff Carl suggests. (never knew there was such a product)



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67' Grande Parisienne. Ex Ottawa USSR Embassy car, 67- 68.
6977017306_dfca361bfc_m.jpg
 


Canadian Poncho Superstar!

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Carl Stevenson wrote:

If it's a posi, the GM specific posi oil (sorry I can't get you tell part number at the moment ) and no additive needed if you use that. For the Muncie 80/90 works great except in January!


 Have not found the all in one GM fluid only the additive Mark posted



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Canadian Poncho Superstar!

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I haven't seen the litre cans of the GM posi oil in many years. I've only seen the Limited Slip additive.

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70 2+2 convertible
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A Poncho Legend!

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I'm back at work after a couple of weeks off and found the number. 89021672 is specifically for posi before the synthetic days. However, it's discontinued. About 25 dealers in the country still have some stock. I have a note in my book that I wrote, Penzoil 550042083 is the same oil apparently.

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1966 Strato Chief 2 door sedan 283 "survivor"


Poncho Master!

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Checked with my GM dealer in Goderich and they still the have AC Delco

Limited Slip Differential Additive in 114ml Canadian part no. 992694.

Have used this since the 60's so on my way up to clean them out........smile



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......big block, 4 speed, bench seat, it doesn't get much better

 happy motoring :burnout



A Poncho Legend!

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As far as I've seen, the 992694 additive is no problem for supply, but the 89021672 is discontinued. A few dealers still show some of it though.

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1966 Strato Chief 2 door sedan 283 "survivor"


Canadian Poncho Superstar!

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IMG_0171.JPG

IMG_0170.JPG



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A Poncho Legend!

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That's the stuff, yup.

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1966 Strato Chief 2 door sedan 283 "survivor"


Canadian Poncho Superstar!

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Ford recommends this stuff

IMG_0172.JPG



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A Poncho Legend!

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I've heard that mixed with sawdust and bananas will take away some of the howl in the Ford diffs.

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1966 Strato Chief 2 door sedan 283 "survivor"


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Just sitting here waiting for a rebuttal.

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A Poncho Legend!

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Fordboy's got nothin'.

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1966 Strato Chief 2 door sedan 283 "survivor"


Canadian Poncho Superstar!

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Carl Stevenson wrote:

Fordboy's got nothin'.


 Did you Banned him?confuse



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A Poncho Legend!

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Sadly I can't, or it would have happened long ago...

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1966 Strato Chief 2 door sedan 283 "survivor"


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Fords likes true Maple Syrup, fresh right now!

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