T O P I C R E V I E W
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90GT510
Member # 9199
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posted
I was wondering what type of transmission fluid to use in a 1990 5.0 T5 stock tranny
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89 306
Member # 9042
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posted
u could use that mercon stuff..but theres different ones u could get..redline trany fluid.or some royal purple..
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Duncan Motors
Member # 7045
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posted
gl5 is rearend oil t5 take automatic fluid
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gercolla1
Member # 3068
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posted
use dextron/mercon III in all world class T5's and yes a 90 T5 is a world class.
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91fox
Member # 7842
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posted
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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90GT510
Member # 9199
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posted
I forgot to mention it is stick shift. does it matter?
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Adam5.0
Member # 6995
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posted
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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1HaTCheD5LiTEr
Member # 8269
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posted
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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91fox
Member # 7842
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posted
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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