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post #1 of 12 (permalink) Old 07-16-2013, 04:48 PM Thread Starter
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Manual LS Trans Fluid

ive read so many threads that's its not even funny. some say use GM only fluid, others say use synthetic and then other people say the synthetic acts up with the synchros and causes issues. Can anyone give me a clear answer as to what fluid is right for my F23 transmission? with 100k miles or 160k km on my car I figure its time to change it.

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post #2 of 12 (permalink) Old 07-16-2013, 04:53 PM
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There's a thread for this. Have you physically checked the fluid to see if its dirty?

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post #3 of 12 (permalink) Old 07-16-2013, 05:05 PM
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The owners manual says to use Dextron III, which has since gone out of production. My dealer (who I never go see) said Dextron VI is a suitable replacement and upgrade, and that's what I put in my car. At 105,000km the fluid was a dark brown colour with metal shavings sitting at the bottom. ZZP says MT-90 is the best possible tranny fluid for our cars, but it's pricey.

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post #4 of 12 (permalink) Old 07-16-2013, 05:05 PM
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GM fluid lasted this long...

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post #5 of 12 (permalink) Old 07-16-2013, 05:13 PM
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Quote:
Originally Posted by Coby7 View Post
GM fluid lasted this long...
Isn't it recommended that automatics get flushed on a more regular basis? Somewhere around the 60-70km ballpark?

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post #6 of 12 (permalink) Old 07-16-2013, 05:17 PM Thread Starter
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Quote:
Originally Posted by BankerBalt View Post
There's a thread for this. Have you physically checked the fluid to see if its dirty?

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no I haven't but I know my passenger side axle seal has a slight leak to it and im not sure how much fluid is in there.

---------- Post added at 09:16 PM ---------- Previous post was at 09:15 PM ----------

Quote:
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GM fluid lasted this long...
sounds like something I would say.

---------- Post added at 09:17 PM ---------- Previous post was at 09:16 PM ----------

Quote:
Originally Posted by Plain Jane View Post
The owners manual says to use Dextron III, which has since gone out of production. My dealer (who I never go see) said Dextron VI is a suitable replacement and upgrade, and that's what I put in my car. At 105,000km the fluid was a dark brown colour with metal shavings sitting at the bottom. ZZP says MT-90 is the best possible tranny fluid for our cars, but it's pricey.
I know dex6 is correct for the automatics but ive read that it should never be used in manual transmissions.

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post #7 of 12 (permalink) Old 07-16-2013, 05:35 PM
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I've gone 10,000km+ on DexVI with no issues. It smoothed out my shifting through the gates a bit, especially during the snowy months. Which, is the majority of months in Quebec.

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post #8 of 12 (permalink) Old 07-16-2013, 05:36 PM Thread Starter
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seems like the proper fluid is GM part Number 88861800

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post #9 of 12 (permalink) Old 07-16-2013, 05:42 PM
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seems like the proper fluid is GM part Number 88861800
En Anglais s'il vous plait.

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post #10 of 12 (permalink) Old 07-16-2013, 05:50 PM Thread Starter
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it means the proper fluid is that part number from gm, but from more research a lot of people say its basically just dex 3

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2017 F150 XLT-XTR - 5.0L, 4x4, 3.55's, E-locker, xtr chrome package, fx4 off-road package.
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