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Re: What gear lube for differantial?
Posted by: 66vairman ()
Date: October 31, 2018 08:52AM

DON'T use Red Line MT-90 in a Corvair. In their "fine print" it says MT-90 is NOT approved for hypoid gear transaxles - like the Corvair.

While the Sta-Lube GL-4 viscosity is too great for freezing weather (as reported by some to cause difficult shifting until the drivetrain warms up) it works fine in warmer conditions. Many have used it for years without issue.

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Re: What gear lube for differantial?
Posted by: Mel ()
Date: October 31, 2018 09:47AM

GL-4 is very hard find in our part of Ontariosad smiley so a friend of mine ordered GL-4 from the local Walmart store, took 2 or 3 weeks but price was good and it was old school GL-4smiling smiley

Orangeville, Ontario. CANADA

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Re: What gear lube for differantial?
Posted by: jasonscorvairs ()
Date: October 31, 2018 09:51AM

Thanks
No Gl4 here in small town Bc and can't order. Only Gl5. I do some searching when I go to Spokane next week

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Re: What gear lube for differantial?
Posted by: jasonscorvairs ()
Date: October 31, 2018 10:00AM

Mel do you know what brand the Wal-Mart oil was?

68 Monza Coupe Palomino Ivory 140hp 4sp
68 Monza Coupe Grecian Green 110hp 4sp ( daily driver 31 years)
65 Monza 4 door 140hp PG
1989 Gmc Vandura full of corvair parts


Grand Forks BC

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Re: What gear lube for differantial?
Posted by: Wagon Master ()
Date: October 31, 2018 10:11AM

[www.walmart.com]

'29 Ford Model A Tudor
'61 700 Lakewood 110 4 speed
'69 Monza Convert. 140 Auto.
'70 Dodge Challenger R/T 440 4 speed

Been aircooled since 1973
Northwest Ohio

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Re: What gear lube for differantial?
Posted by: Frank DuVal ()
Date: October 31, 2018 11:47AM

That RPM gear oil is only GL-1 rated. So NO where can it be used on a Corvair.

Frank DuVal

Fredericksburg, VA

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Re: What gear lube for differantial?
Posted by: richard1 ()
Date: October 31, 2018 05:09PM

Going back to square one, I suggest reading the link in my signature.

On some of the comments, Finding 80W-90 GL-4 a little thick for 70ºF shifts in the mornings, I went to 75W-90 GL-4 and am more than convinced. I certainly would not use the 85W-90, as it is the top range of the SAE 90 viscosity. Take a look at the graph.

And as mentioned, that Chevron RPM is a GL-1 (motor oil would be better).

There are a lot of excellent 75W-90 GL-4 and GL-4+ oils on the market today.

(and then again, if you have a PG, you can use the GL-5 and only your gas mileage will suffer by increasing to 85W-90)

Restoration in Bolivia
Richard's Mini Pickup
Richard's Corvair
Richard's Renault Dauphine

Selection of the Right Motor Oil for the Corvair
Selection of the right transmission oil for the corvair
How to polish and restore stainless and aluminum trim

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Re: What gear lube for differantial?
Posted by: v8vair ()
Date: October 31, 2018 06:35PM

Just for fun i mixed two quarts of Pennzoil Syncromesh with 2 quarts of 75/90 GL5 3 years ago on my everyday driver 64 Monza, Probably 10,000 miles now, Shifts great, the syncros havent exploded !!
66vairman, your friend that ran the Redline NS had a mechanical failure, Not from the NS. The Only TWO gear oils that kept the Syncro rings and Posi plates alive in my V8 Racer was Swepco 201 and Redline 75/90 NS. And yes they are both GL5s. Never had a trans failure as long as the pump for the trans/diff cooler was on. I have some gl4 brad penn for customes but i dont run it in any of my cars. Mike

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Re: What gear lube for differantial?
Posted by: jasonscorvairs ()
Date: October 31, 2018 07:50PM

Excellent Thanks for all the info. Richard thank you for the chart

68 Monza Coupe Palomino Ivory 140hp 4sp
68 Monza Coupe Grecian Green 110hp 4sp ( daily driver 31 years)
65 Monza 4 door 140hp PG
1989 Gmc Vandura full of corvair parts


Grand Forks BC



Edited 1 time(s). Last edit at 10/31/2018 07:52PM by jasonscorvairs.

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Re: What gear lube for differantial?
Posted by: JimBrandberg ()
Date: November 01, 2018 04:35AM

I've been using Sta-Lube GL-4 85/90 from NAPA at $36 a gallon. Where can I find something that's GL-4 80/90?

Jim Brandberg
Isanti, MN
CorvairRepair.com



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Re: What gear lube for differantial?
Date: November 01, 2018 04:57AM

Amazon is where i got my Brad Penn.

Brad Penn on Amazon

1961 Corvair 700 Sedan - 3sp - Gasoline Heat - Lowered a bit - Rust in Progress
I live my life 19.5 seconds at a time.


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Re: What gear lube for differantial?
Posted by: jasonscorvairs ()
Date: November 01, 2018 07:40AM

Just bought some Lube King GL4 80w90 on eBay 2 gallons 39$

68 Monza Coupe Palomino Ivory 140hp 4sp
68 Monza Coupe Grecian Green 110hp 4sp ( daily driver 31 years)
65 Monza 4 door 140hp PG
1989 Gmc Vandura full of corvair parts


Grand Forks BC

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Re: What gear lube for differantial?
Posted by: JimBrandberg ()
Date: November 01, 2018 09:00AM

The only Lube King GL4 I see on Ebay is 90 weight. Am I missing 80/90 somehow?

I put Redline MT90 GL4 75/90 in a car once. Since it's not for hypoid did I do a bad thing? Is there a Redline that is good for us?

Jim Brandberg
Isanti, MN
CorvairRepair.com



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Re: What gear lube for differantial?
Posted by: jasonscorvairs ()
Date: November 01, 2018 11:16AM

EBay number
382291047443

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Re: What gear lube for differantial?
Posted by: 66vairman ()
Date: November 02, 2018 09:28AM

v8vair Wrote:
-------------------------------------------------------
> Just for fun i mixed two quarts of Pennzoil
> Syncromesh with 2 quarts of 75/90 GL5 3 years ago
> on my everyday driver 64 Monza, Probably 10,000
> miles now, Shifts great, the syncros havent
> exploded !!
> 66vairman, your friend that ran the Redline NS had
> a mechanical failure, Not from the NS. The Only
> TWO gear oils that kept the Syncro rings and Posi
> plates alive in my V8 Racer was Swepco 201 and
> Redline 75/90 NS. And yes they are both GL5s.
> Never had a trans failure as long as the pump for
> the trans/diff cooler was on. I have some gl4
> brad penn for customes but i dont run it in any of
> my cars. Mike

Thanks Mike for the update on the failure. The RedLine "NS" specs. look good and while it is GL5 the "NS" indicates it is modified for use in older transaxles. I wish RedLIne would have used a better name for the "NS" GL5 to differentiate it from their standard GL5

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Re: What gear lube for differantial?
Posted by: vairchet ()
Date: November 02, 2018 09:45AM

This is what I use:

Chet in Ramona

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Re: What gear lube for differantial?
Posted by: JimBrandberg ()
Date: April 09, 2019 12:39PM

So the Lube King GL-4 80/90 on Ebay at $40 for 2 gallons should be okay for our manual transmissions.
Is it a good hypoid for our differentials?
The Ebay listing does not have a picture of the back side label.

There was discussion above that Redline MT-90 might not be so good where hypoid is concerned. Is there a Redline oil that is good for both our transmissions and differentials?

I need to stock up. I've been using Sta-Lube 85/90. No use spending $36 a gallon if it's a little too thick anyway.

Jim Brandberg
Isanti, MN
CorvairRepair.com






Edited 1 time(s). Last edit at 04/09/2019 12:40PM by JimBrandberg.

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Re: What gear lube for differantial?
Posted by: JimBrandberg ()
Date: April 13, 2019 11:51AM

No comments on Redline or Lube King?

Jim Brandberg
Isanti, MN
CorvairRepair.com



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Re: What gear lube for differantial?
Posted by: JimBrandberg ()
Date: April 13, 2019 12:19PM

It looks like the Lube King has EP (extreme pressure) designation for hypoid gears. It seems that the GL-4 designation should cover our transmission needs.
I guess I'm just looking for some confirmation that this is the good stuff.

Jim Brandberg
Isanti, MN
CorvairRepair.com



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Re: What gear lube for differantial?
Posted by: joelsplace ()
Date: April 13, 2019 03:56PM

I don't think there is any way to know without sending some off to be analyzed before and after using it.

Joel
Northlake, TX
5 Ultravans, Lost count at 100 Corvairs...

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