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Unread 10-09-2013, 10:31 PM   #1
Woodduckwhacker
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T4 lubricant?

What lubricant do I need to use for a t4 transmission?

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Unread 10-09-2013, 11:43 PM   #2
BagusJeep
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AMC issued a service bulletin in the early Eighties and only allowed a special lubricant to be used, referred to by the mechanics I am told as "Fishoil" due to is smell. The bronze internal components were being eaten by regular gear oil and leading to warranty claims.

if you look on the Internet this debate rages across many websites as to which is the right one. Some say ATF, some GL5 (maybe I meant GL4) , some a homegrown soup of various lubricants.
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Unread 10-10-2013, 07:24 AM   #3
scrapman
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Find a gear lube with a GL4 rating. Not GL5 or GL4/5. Just GL4. I had to go to an old auto parts store that had been around for 50 years to find it. You can find it online too. My t4 shifted much better after I drained the fluid in it, and re-filled with the GL4. It helps with the brass that is used in the t4's. After looking online and several other sources, GL4 seemed to be the general recommendation from the majority.
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Unread 10-10-2013, 07:37 AM   #4
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Quote:
Originally Posted by scrapman View Post
Find a gear lube with a GL4 rating. Not GL5 or GL4/5. Just GL4. I had to go to an old auto parts store that had been around for 50 years to find it. You can find it online too. My t4 shifted much better after I drained the fluid in it, and re-filled with the GL4. It helps with the brass that is used in the t4's. After looking online and several other sources, GL4 seemed to be the general recommendation from the majority.
This would apply to the T5 as well????
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Unread 10-10-2013, 08:36 AM   #5
scrapman
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This would apply to the T5 as well????
I don't think so. I believe it calls for a different oil.
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Unread 10-10-2013, 09:24 AM   #6
j33pman
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Quote:
Originally Posted by CJ7KAHUNA View Post
This would apply to the T5 as well????
Yes.

after doing this research a few years ago for my T5 I ended up with Redline synthetic in mine
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Unread 10-10-2013, 10:08 AM   #7
walkerhoundvm
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Originally Posted by scrapman View Post
I don't think so. I believe it calls for a different oil.

T4 is basically a condensed version of a T5 - your argument is invalid. Every source I've found says to use a product like Penzoil Synchromesh. I've tried gear lube and was not happy with the results.
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Unread 10-10-2013, 10:48 AM   #8
keith460
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Use GL4 or a Synchromesh lubricant like Pennzoil that is designed to work with the bronze clocking rings. Both can be used in either the T4 and T5 transmissions.
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Unread 10-10-2013, 11:26 AM   #9
capt205
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Originally Posted by keith460 View Post
Use GL4 or a Synchromesh lubricant like Pennzoil that is designed to work with the bronze clocking rings. Both can be used in either the T4 and T5 transmissions.
The Pennzoil Synchromesh is what I use for the T5, and meets the spec.
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Unread 10-10-2013, 11:44 AM   #10
walkerhoundvm
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The problem I had with gear lube was that it wasn't very cold weather tolerant. Really poor shifting when temps got below freezing. :2cents:
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Unread 10-10-2013, 08:50 PM   #11
Woodduckwhacker
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Thank you for the input I will find one of the 2
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Unread 10-10-2013, 09:21 PM   #12
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Quote:
Originally Posted by walkerhoundvm View Post
The problem I had with gear lube was that it wasn't very cold weather tolerant. Really poor shifting when temps got below freezing. :2cents:
Which is why some people recommend ATF, others dilute gear oil with ATF to get that low viscosity. However the recall notice issued in the early Eighties about wear on 1st and 5th was when AMC were putting in ATF, so be warned.

Pennzoil Synchromesh is I undertand a GL4 with additives for the bronze and copper alloy synchros, it does not work well with fibre. If you want GL4 it would be suitable.

Whatever you use needs to be safe for bronze components. Interestingly whilst the FSM recommends GL5 for the T176 (which would affect bronze parts) for the T4/T5 it recommends:
t5-gear-oil.png

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Unread 10-11-2013, 06:29 AM   #13
colojeepguy
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My local NAPA store carries this GL-4 90wt gear oil
http://www.crcindustries.com/ei/prod...spx?id=SL24239
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Unread 10-11-2013, 06:34 AM   #14
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I recommend chicken soup. But not any chicken soup. It has to be homemade, not canned. And don't use frozen chicken, it has to be fresh. And for God's sake, boil the carcass for at least a couple of hours to extract all of the flavory-goodness.
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Unread 10-11-2013, 06:51 AM   #15
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Quote:
Originally Posted by Ken4444 View Post
I recommend chicken soup. But not any chicken soup. It has to be homemade, not canned. And don't use frozen chicken, it has to be fresh. And for God's sake, boil the carcass for at least a couple of hours to extract all of the flavory-goodness.
Is this for the T4, T5 or both?
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My childhood was typical. Summers in Rangoon, luge lessons. In the spring we'd make meat helmets.
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