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10-02-06, 01:35 PM
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#1 | | Forum Regular
Join Date: Sep 2006 Location: Texas
Posts: 118
| 90wt gear oil substitute?
With all the improvements on oil, what could be acceptable to use rather than 90 in my '75?
__________________  '75 fj40 jim_grier@yahoo.com Solid Rock Off-Road Sliders  He died on the cross for you and me.  Gunsmith | 
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10-02-06, 01:52 PM
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#2 | | 10k Club
Join Date: Mar 2003 Location: Sacramento, CA
Posts: 11,245
| Use 80w-90 GL5. It's available everywhere.
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Andrew
1971 FJ-40 Rubicon tested, 85 2F (with a little help from my Cruiser brothers) , SOA, SM420, some mods--It abides
1976 FJ40 gone
1984 FJ-60 H41, Toybox, 4.56/ARBs, SOA, twin sticks and Rubicon tested
1989 FJ-62 138k-OME, daily driver-H55f
1997 FZJ-80 Driveway queen, with door dent and a new head gasket
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10-02-06, 02:26 PM
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#3 | | Oh...Durka Durka Durka.
Join Date: Oct 2003 Location: TLCA#1856 :)
Posts: 19,404
| Quote:
Originally Posted by vagabond  With all the improvements on oil, what could be acceptable to use rather than 90 in my '75? |
Welcome.
What are you trying to gain by not running 80W-90 gear oil in your old truck?
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10-02-06, 02:37 PM
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#4 | | Lifer
Join Date: Jun 2004 Location: sittin on the couch in UT
Posts: 6,807
| Quote:
Originally Posted by Poser Welcome.
What are you trying to gain by not running 80W-90 gear oil in your old truck? |
more horsepower!!!!! | |
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10-02-06, 03:40 PM
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#5 | | 10k Club
Join Date: Mar 2003 Location: Sacramento, CA
Posts: 11,245
| I would try some things that look like gear oil and see how far you get, and what you learn. Some suggestions:
Karo syrup
Used motor oil
Maple syrup (winter only) 
__________________
Andrew
1971 FJ-40 Rubicon tested, 85 2F (with a little help from my Cruiser brothers) , SOA, SM420, some mods--It abides
1976 FJ40 gone
1984 FJ-60 H41, Toybox, 4.56/ARBs, SOA, twin sticks and Rubicon tested
1989 FJ-62 138k-OME, daily driver-H55f
1997 FZJ-80 Driveway queen, with door dent and a new head gasket
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10-02-06, 05:12 PM
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#6 | | Forum Regular
Join Date: Apr 2005 Location: Northwest
Posts: 176
| we use a 75-90W mobil synthetic gear oil in some expensive gearboxes here, and it seems to drop oil temperature about 30 degrees, makes the gearboxes survive instead of dying once a year. problem is it's $8 a bottle. but you might find a better price on it somewhere | |
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10-02-06, 10:08 PM
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#7 | | 250+ Club
Join Date: May 2005 Location: Silverdale,WA
Posts: 793
| I run Amsoil 75-90 synthetic, and love it!!! | |
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10-03-06, 07:15 AM
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#8 | | Forum Regular
Join Date: Sep 2006 Location: Texas
Posts: 118
| 90wt
thank you all for your input.
Glad to hear of your recommendations!
__________________ '75 fj40 jim_grier@yahoo.com Solid Rock Off-Road Sliders He died on the cross for you and me. Gunsmith | |
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10-06-06, 01:23 AM
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#9 | | 250+ Club
Join Date: Jul 2005 Location: Wellington, NZ
Posts: 800
| use Redline shockproof- choose the viscosity to suit your driving style - this stuff also works well with water in it - for some reason it doesnt break down the way std oils do. | |
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10-06-06, 01:51 AM
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#10 | | 250+ Club
Join Date: Sep 2004 Location: Juneau, Ak; Fairbanks, AK
Posts: 548
| I get Mobil Synthetic Gear Lube in the $5 bucket. $99.
Mobil 1 is more expensive. Supposedly it's the same stuff plus some limited slip additives. Since I don't have a limited slip, I don't use it.
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'76 FJ40, "GIR". A bigger money pit than my tuition!
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10-06-06, 02:00 AM
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#11 | | Lifer
Join Date: Feb 2006
Posts: 2,585
| royal purple, great stuff but pricey :(
Lou | |
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Cruiserdrew
Poser
1969 Toyota Land Cruiser, FJ-40
my cruza
