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Unread 02-15-2010, 04:37 PM   #1
Chili4me
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Q-Trac with 80/90 in it

Pretty sure I already know the answer to this, but.....

I have a 79 CJ7 that was gutted by a PO. I have been working through his mess, and got to the transfer case this past weekend an it was filled with 80/90.

Any ideas on potential damage if any?

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Unread 02-15-2010, 04:40 PM   #2
ccbhunter14
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Not sure why there'd be any damage from the oil, anything around GL4 80/90 should run fine
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Unread 02-15-2010, 04:45 PM   #3
Chili4me
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From what I can tell it should take 30W
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Unread 02-15-2010, 04:45 PM   #4
rishar1
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If he ran anything but GL4 in it you could have problems. Check for any filings/shavings in the oil. If alot are present I would recomend a tear down for further inspection.
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Unread 02-15-2010, 04:49 PM   #5
CSP
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No, GL4 80/90 is not fine! Only the recommended Qtrac TCL-1 lube should be used on a Qtrac unless it has been converted to part-time drive via MileMarker conversion kit.

The Qtrac has brake cones and clutch plates inside it that require a certain level of lubricity to provide the differential action necessary for full time 4WD. Without the right fluid these parts will wear prematurely and once they are shot the tcase is essentially shot and forward motion will cease to exist unless you engage the emergency drive.

Look here for detailed info on the BW-1339 Qtrac tcase: http://jubileejeeps.org/quadratrac/index.htm


edit:rishar you need to quit telling everyone that GL4 is the recommended oil for tcases. It isn't recommended for every tcase or necessary unless the tcase and transmission share fluids.
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Unread 02-15-2010, 04:53 PM   #6
ccbhunter14
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CSP ur right, i misread the OPs thread title
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Unread 02-15-2010, 04:58 PM   #7
rishar1
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CSP sorry for what I believed to be correct I have run GL 4 in all of my vehicles and have not since had any problems. I run it in everything from ford's to chevys and have not had problems. But I appologize for any incorrect information.
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Unread 02-15-2010, 05:07 PM   #8
CSP
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Sorry if that sounded harsh, but just because you've never had problems doesn't mean that GL4 is a one-size fits all answer.

FWIW, there are tcases like the Qtrac in this case that require a very specific fluid. There are others that require ATF, of which some are synthetic only (my pickup is one that uses synthetic Mercon for example). GL5 is ok (not the best choice, but still OK) for some that don't share fluid with the transmission.
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Unread 02-15-2010, 10:37 PM   #9
jeepdaddy2000
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Quote:
Originally Posted by rishar1 View Post
CSP sorry for what I believed to be correct I have run GL 4 in all of my vehicles and have not since had any problems. I run it in everything from ford's to chevys and have not had problems. But I appologize for any incorrect information.

Generally
speaking, a good rule of thumb is gear oil for cast iron cases and ATF for aluminum. I can't think of a cast iron housing that doesn't call for 80/90.There are onesie twosie exceptions to aluminum as this thread shows (some Fords call for engine oil) but for most 4X4's of this era, it will apply.
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Unread 02-17-2010, 07:41 PM   #10
travisrda
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I did the same thing as what the previous owner did and just threw some 80/90 wt gear oil in mine and ran it. for about 6-8 months then I found out that you were supposed to run the special lube in it so I drained out the 90wt and put in the "special stuff" now it wound much happier I have been running that in it for about a year now and luckily I haven't had any problems with it yet this is in a 1977 wagoneer that is my daily driver.
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Unread 02-19-2010, 04:05 PM   #11
Pathkiller
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Quote:
Originally Posted by travisrda View Post
I did the same thing as what the previous owner did and just threw some 80/90 wt gear oil in mine and ran it. for about 6-8 months then I found out that you were supposed to run the special lube in it so I drained out the 90wt and put in the "special stuff" now it wound much happier I have been running that in it for about a year now and luckily I haven't had any problems with it yet this is in a 1977 wagoneer that is my daily driver.
And you never notice a problem? Geez. My 78 Cherokee was incredibly sensitive to having the right lube. I tried the homebrew recipe for Quadratrac fluid (30W non-detergent motor oil plus a tube of limited-slip differential friction modifier) and found significant binding and poor driving characteristics. Switching back to regular TCL-1 solved the problem. BJ's carries TCL-1 for only $6.50/qt. View the Quadratrac Fluid at http://www.bjsoffroad.com
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