T5 Transmission Fluid - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 09-23-2005, 02:31 PM Thread Starter
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T5 Transmission Fluid

just checking what type of trans fluid in a T5 are my fellow Jeepsters using?
I am current running a GM Auto tranmission fluid, i think it's called "Synchromesh".
??
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post #2 of (permalink) Old 09-23-2005, 03:00 PM
 
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Re: T5 Transmission Fluid

Dextron II. Got quite a few years on it after a rebuild. Good for summer and winter.
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post #3 of (permalink) Old 09-23-2005, 03:13 PM Thread Starter
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Re: T5 Transmission Fluid

Thanks i think that the GM fluid i'm running is considered as Dextron II.
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post #4 of (permalink) Old 09-23-2005, 04:08 PM
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Re: T5 Transmission Fluid

A good person who was once here, disappeared, then came back said that if it has gears it should have gear lube. I think that the manufacturer/AMC said to use ATF because of complaints on cold days of sluggish/hard shifting. I had a Chevy Citation. X-body. V-6. 4 speed. The little thing would scoot. I think it was recommended to use ATF in it. It had a "push-me-pull-you" cable assembly going from the transmission to the gear shifter. I bet that with gear lube on a very cold it would hang up those cables something fierce. I didn't mean to muddy the waters. I use gear lube and on really cold mornings it is a little harder to shift, not impossible. The question that needs to be answered is what are the long term effects useing gear lube vs. ATF. The T4/T5 doesn't have a good reputation standing up to some power and larger tires. I wonder if useing gear lube would improve it's longevity?
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post #5 of (permalink) Old 09-23-2005, 04:38 PM
 
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Re: T5 Transmission Fluid

When i had my T4 rebuilt the tranny place used gear oil instead of ATF. I thought they made a mistake cause i checked the manual and it stated ATF. Since i went out and purchased a bunch of ATF i refilled it with ATF, but is is coming up for a change and i'm going to replace it with gear oil. It doesn't get cold here in So Cal to be a problem. And i talked to a few mechs and they said gear oil was better.
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post #6 of (permalink) Old 09-23-2005, 05:32 PM
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Re: T5 Transmission Fluid

My wc t-4 calls for dextron III.
Can you still get Dextron II?
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post #7 of (permalink) Old 09-23-2005, 08:05 PM
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Re: T5 Transmission Fluid

All Non-World Class T-5 transmissions call for GL-5 (T-4 would be the same). There has never been a factory installed World Class T-5 Jeep (but it does exist).

ATF doesn't provide enough lubrication for Non-World Class T-5's.

World Class T-5's were factory installed in Firebirds, Cameros and Mustangs.

Non-World Class T-5's were factory installed in Jeeps, S10 size GM trucks... likely other things.

Every Jeep Owners Manual from the years that T-4 and T-5 transmission were installed clearly calls for GL5.

Chilton's is simply wrong along with the computers in several chain quick lube places.

Even some transmission shops will tell you to use ATF where it shouldn't be. Experts often are not.

Do a search on this BBS and then on Google for T-5 (and Borg Warner T-5).

The reason is obvious if you take a Non-World Class T-5 apart and look at it.

I can expound.... but not tonight.

[img]/ubbthreads/images/graemlins/40BEER.gif[/img]
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post #8 of (permalink) Old 09-24-2005, 08:23 PM
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Re: T5 Transmission Fluid

[ QUOTE ]
I can expound.... but not tonight.

[/ QUOTE ]

OK, it's another day and I'm up for it.

First let me say that I have never found anything in print from AMC to even remotely suggest filling a T-4 or T-5 with any lubricant other than GL-5 (often confused since AMC had their own PN#).

Let's just start with the owner's manual. Here's page 151 and 152 from my 1985 CJ-7's owner's manual, yes I still have it.



You could get confused by the AMC part numbers, but SAE 75W-90 (API GL-5) looks to be very very clear.

Then there's the T4/5 Component Service Manual, I've got one of those too and scanned it today to share.

<u>B.V. T4/5 Component Service Manual, Manual Transmission T4/5</u>

Warning this is a 4.11MB PDF file (NOT DIAL UP FRIENDLY), but if you need to rebuild a T-4 or T-5 well worth the time. Please look at page 58 where 85W-90 API Grade GL-5 is a "newly approved second lubricant" for Jeep T4/5.

So if you were to do a Google search for T-5 you should come up with these pages:

<u>Not All T-5's are Created Equal</u>

<u>Borg-Warner T-5 Transmission Data</u>

<u>Identifying a T-5</u>

Anyone care to share their search results for T-5 lubrication on this BBS?? There are several threads in the past year or two....

It was around 85 degrees here in Indy today, well past warm enough to toast a Jeep T-5 running ATF in under an hour drive. [img]/ubbthreads/images/graemlins/crazy.gif[/img]

[img]/ubbthreads/images/graemlins/40BEER.gif[/img]
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post #9 of (permalink) Old 09-30-2005, 08:31 PM Thread Starter
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Re: T5 Transmission Fluid

thanks for the feedback, Now that we are going into in Fall to winter in North Carolina, do you think that ATP would work? And chage over to 75-90 in the Spring?
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post #10 of (permalink) Old 09-30-2005, 09:00 PM
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Re: T5 Transmission Fluid

[ QUOTE ]
thanks for the feedback, Now that we are going into in Fall to winter in North Carolina, do you think that ATP would work? And chage over to 75-90 in the Spring?

[/ QUOTE ]

I only run GL-5, it gets pretty darn cold here sometimes. Having broken a T-5 because it was filled with ATF I would never suggest that you put ATF in a Jeep T-5 in any situation.

You could have done a search... still can I guess. Try this thread and follow the links that I posted for synthetic lubes if you don't want to put GL-5 in your T-5.

<u>Super lube put ATF in my Dana 300 TC</u>

[img]/ubbthreads/images/graemlins/40BEER.gif[/img]
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