Motor oil in tranny

[jasonw_2005]

So I had my clutch cable adjusted by a shop after installing a new clutch and I asked them to refill the tranny fluid cause I lost quite a bit when the drive shaft came out. When I pick up the car the guys tells me he filled it with 10-30 motor oil I'm thinking this is baddd ju ju but is it?

[jnobles06]

not really. it is probably better than atf as far as its lubricating properties. i would drain it and refill it with AFT to be safe though. it shouldn't hurt it to much, if at all.

what year is the car? i know early 80's mustangs ran gear oil.

[jasonw_2005]

I just dont want my sheeeeet burning up

[jasonw_2005]

It's a 93

[majorownage]

It's a 93

pennsoil synchromesh

The best by far

[jnobles06]

it might make it a little harder to shift when cold but shouldn't hurt it.

[71chevellejohn]

Just drain it and refill it with ATF.

[Dan03mach]

I use to run Mobile1 10 30 in my TKO I had and it use to work alot better. It shouldn't hurt it at all.

[thesource]

If its a T5, you really need to run atf in it. Motor oil is a little too thick to get under the gears and lubricate them properly especially in cold weather. In the summer, you can get away with going with a light weight motor oil in it in a pinch.

[jetboat]

What shop did you go to?

[turbos66coupe]

Fill it with mercon/dexron 3 . Tko and tremecs in general are a different animal with different friction coeffecients for the synchros. That's why they run synchro mesh etc. Big no no in a t5.

[SNEAKY]

i ran 10w30 in my T5's