trans fluid for 94 cobra?

My 3550 I used to have required Synchromesh, but I think it's overkill in a T5. If you have whining then fluid isn't going to solve your problem.

Besides that, 3 quarts of GM Synchromesh is about 30 bucks! What a waste it'll be if you still have noise after the fluid change!

I was told by a career mustang trans tech. that Mobil 1 ATF is the preferred tranny oil for our cobras.

I was told this about a month after I put in Royal Purples new manual trans fluid. So I didnt wanna change it right after having done it already.

Had the Royal Purple in for about 6 months now and its doing just fine. I love how easy it is to replace too!!! Save yourself and buy one of the pumps. Its so convenient, and it only takes like 5 min to do it.

then, take your pump and change out your rear gear fluid too, cuz its probly time for that as well. :OT:

Chythar said:

Mercon V is fine for a 94 Cobra. I've searched the web on this, and some folks have good luck with synthetics, others report problems. I have actually found a recommendation AGAINST Valvoline ATF, saying it caused some shifting problems and some gear whine. This does match problems I'm having right now with my T5, so I'll also recommend against Valvoline ATF. I'll be buying some Mobil 1 ATF soon to replace the Valvoline ATF I have in now.

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Maybe that's what the deal is with my Cobra. None of the synchros grind, but the tranny whines in every gear except 1st. Loudest in 3rd.