When I did my clutch last summer I flushed my trans case with new fluid. It was red at the time. I just pulled the trans again to get it rebuilt and I noticed the fluid was a blackish/ purple color. I don't think this is a good thing. Can you guys help me out? It is a T5. I used ATF fluid when I changed it last time. Thanks.

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1986 CAMARO Z28 ->
151,000 original miles, 43,000 on 89' vette 350 block, Holley 650 DP, Weiand intake, 1.6 rockers, 1 5/8" headers, no cat, 2 1/2" Flowmaster catback, Mallory coil, March pulleys, T5 with 3.35 1st gear and 0 miles, 90% Centerforce clutch, 3.73 posi, Eibach 1" drop springs, Spohn LCA's, Spohn adjustable panhard rod, Subframe connectors, polyurethane swaybar bushings/endlinks, 2 12" Sound Streams, 2 Infinity 6X9's, 2 Pioneer 6X9's, 800 watt Lanzar Vibe amp. ET 13.22@ 106.4MPH 3300lbs less driver and speakers Next mods-> B&M shifter, Extreme Energy 268 cam, Holley street dom intake.

1987 TRANS AM ->
73,000 miles, 305TPI, auto, all stock.

 

Is your trans the original from 86? According to the Chilton's and Haynes manuals, T5's from 83 to 86 use gear oil. 87 uses 5w30 motor oil, and 88 and newer use ATF. Just my 2 cents, but you may have used the wrong fluid in it.

 

I think he is right.My 92 callss for ATF,though I use 10w30 mobil 1 in my trans.(same consistency but better to ward off heat.)
The older trans designs had different plastic in the synchros and hardness in the gears.
I have friends that are Mustang guys(yeah,yeah...)and they have the same fluid requirements as US!
Check an original owners manual for your requirements.
Maybe I,ll see you at the Woodward cruise.

1992 RS
305 TBI
T-5
"Stripper"no air windows or locks
Teal w/stock 16" 5-spokes
CRANE 2031 compucam
350 injectors
Edelbrock TES headers w/3" outlet
Dynomax intermediate pipe 3"
ported stock intake
Work on throttle body
Roller tip rockers
Edelbrock valve springs
MSD coil
Open element
14.5@95mph
2nd car:1966 Dodge(yes Dodge Charger)383 Magnum