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» Northern California Ford Owners     » Automotive   » Tech Talk   » GL5?

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Author Topic: GL5?
90GT510
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Member # 9199

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I was wondering what type of transmission fluid to use in a 1990 5.0 T5 stock tranny

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Stay Sydewayz

Posts: 1725 | From: East Bay/Dallas, TX | Registered: May 2009  |  :
89 306
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u could use that mercon stuff..but theres different ones u could get..redline trany fluid.or some royal purple..

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02 mustang gt...mods soon to come!

89 lx: 306. edelbrock. heads..ported gt 40 manifolds..and all that other good stuff.

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Posts: 1268 | From: richmond | Registered: Mar 2009  |  :
Duncan Motors
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gl5 is rearend oil t5 take automatic fluid
Posts: 6310 | From: Vallejo | Registered: Sep 2006  |  :
gercolla1
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use dextron/mercon III in all world class T5's and yes a 90 T5 is a world class.

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Sf Bay Area

Posts: 2171 | From: Sampan San Francisco | Registered: Jul 2003  |  :
Captain Obvious
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all world class T5's 85 and up use auto fluid dex/mercon 3 and NON world class T5's use gear oil

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It's NOT illegal. It's just frowned upon, like masturbating on an airplane.

Posts: 1976 | Registered: Aug 2007  |  :
90GT510
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I forgot to mention it is stick shift. does it matter?
Posts: 1725 | From: East Bay/Dallas, TX | Registered: May 2009  |  :
Adam5.0
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quote:
Originally posted by 90GT510:
I forgot to mention it is stick shift. does it matter?

Oh boy. just take it to a shop

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want something old and japanese

Posts: 1609 | From: Brentwood | Registered: Aug 2006  |  :
SLOWSN95
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T5s are sticks...AODs are automatics
Dex/merc III is what it takes but you can use anything up to Dex/Merc V

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94' GT
347 Stroker
MM Suspended

2003 SB SVT Lightning
Pullied and Lowered

89'Hatch-SOLD

Posts: 2214 | From: 510/east bay | Registered: Mar 2008  |  :
Captain Obvious
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quote:
Originally posted by 90GT510:
I forgot to mention it is stick shift. does it matter?

using auto fluid dex/merc III in your T5 stick shift is not a problem, thats what borgwarner (T5's original manufacturer)specifies to use in those manuel transmissions.
the reason to use auto fluid in a World Class T5 (thats what you have)is because they started using a thin caged needle bearing between the gears 1st-3rd to reduce friction. and to lubericate these bearings they switched from gear fluid which was too thick to flow inbetween the small bearings, to a thinner automatic trans fluid dex/mercon.

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It's NOT illegal. It's just frowned upon, like masturbating on an airplane.

Posts: 1976 | Registered: Aug 2007  |  :


 
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