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post #1 of (permalink) Old 08-30-2001, 04:33 PM Thread Starter
 
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Tranny Help

i need to know what fluid goes inside a 1983 CJ-7 T-5 5 speed transmission as well as the same year Dana 300. So far the contenders are GL-5, 80w-90, or Dex II. i would think one of the gear oils, but due to the confusion among some publishers, i thought i would ask the people in the trenches. Thanks for any help.

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post #2 of (permalink) Old 08-30-2001, 04:50 PM
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Re: Tranny Help

The Dexron is an Auto tranny fluid and therefore a hydrolic fluid used where pressure is needed. The 5-speed is dealing with gears and so use the gear oil. Some t-cases use auto fluid but only the chain driven ones. If the 300 is gear driven, use the gear oil.
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post #3 of (permalink) Old 08-30-2001, 06:52 PM
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Re: Tranny Help

GL-5 is a spec for gear oil.. i.e. you would buy 80w90 GL-5 gear oil


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post #4 of (permalink) Old 08-30-2001, 07:11 PM
 
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Re: Tranny Help

IM pretty sure some later T5 applications ( Ford Mustangs) spec'd DexII in them also.

its a mileage thing, sacrifice a little longevity for a little gained MPG.

use gear lube in both.

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post #5 of (permalink) Old 08-31-2001, 12:32 AM
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Re: Tranny Help

According to the Factory Service Manual, the T-5 should have "AMC/Jeep Automatic Transmission Fluid or equivalent Dexron II".

The D300 takes gear oil, 85W-90 (API GL-5).

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post #6 of (permalink) Old 09-01-2001, 02:17 AM
 
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Re: Tranny Help

Does the T-4 need dex II as well?

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post #7 of (permalink) Old 09-01-2001, 08:40 AM
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Re: Tranny Help

Do a search here. I wish I could give credit where credit is due, someone said "Gear lube for gears, hydraulic fluid for pressure applications". Sometimes in cold climates a T-4 or -5 will shift stiff when cold. I found a 75W-90 gear lube for those colder mornings.

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post #8 of (permalink) Old 09-01-2001, 10:09 AM
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Re: Tranny Help

Advance Adapters says to use Dextron III in their WC T-5s and T-4s. 80 to 90 wt gear oil is right for the Dana 300. I ran 80-90 in a rebuilt SR-4 and it blew in less than a year.

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