5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Transmission Oil

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Old 03-05-2007, 02:49 AM
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Mustangn
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Default Transmission Oil

When should the transmission oil be replaced.?


I have a 1991 GT with manual trany,all stock with 54K Original Miles.
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Old 03-05-2007, 02:51 AM
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FullAuto
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Default RE: Transmission Oil

If it ain't broke, don't fix it.
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Old 03-05-2007, 02:58 AM
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90Lxstanger
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Default RE: Transmission Oil

ORIGINAL: Mustangn

When should the transmission oil be replaced.?


I have a 1991 GT with manual trany,all stock with 54K Original Miles.
Nothings broke, just wanted to know if he should change it, I would suggest it maybe since mustang manual say every 100,000 miles, and if you do it go synthetic..........
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Old 03-05-2007, 03:14 AM
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94gtcoupe
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Default RE: Transmission Oil

good idealets just not change our tranny fluid untill somethings broke in it thats a good idea... i donno maybe u read that wrong or something but no changing fluids is one of the dumbest things to do... the manual says 100,000 miles.... i suggest the first change to be75,000-100,000 andevery50,000 after the initial fluid change... om a rebuilt tranny i suggest after 1000 miles then every 50,000 after that
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Old 03-05-2007, 04:05 AM
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Ninety5five0
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Default RE: Transmission Oil

While on the subject....I need to flush mine out and put new in before i start drivin my car again. What kindof fluid is best to use in a T5 ?
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Old 03-05-2007, 07:33 AM
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94gtcoupe
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Default RE: Transmission Oil

thats a matter of opinion, i recomment GM syncromesh (what i personaly use), or another name brand full synthetic, syncromech is the only half synthetic that i like and acutalu works better than other full synthetics i've used
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Old 03-05-2007, 10:14 AM
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PONY GUY
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Default RE: Transmission Oil

every 30,000 if a auto and every 50,000 if manual

on aod, c4 or any ford auto use mercon3 I change the filter every 30k and get the system flushed every 60k.

manuals either take mercon or gear oil check you service manual for proprer fluid
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Old 03-05-2007, 10:23 AM
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ROTTITANK
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Default RE: Transmission Oil

ORIGINAL: 94gtcoupe

thats a matter of opinion, i recomment GM syncromesh (what i personaly use), or another name brand full synthetic, syncromech is the only half synthetic that i like and acutalu works better than other full synthetics i've used
+1 syncromech
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