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Old 03-22-2015, 12:33 PM
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Texasdoc Texasdoc is offline
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Join Date: Feb 2012
Location: Keller, TX
Cobra Make, Engine: Lonestar Classics LS427. Self-built 408W, AFR 195 heads, Performer RPM Intake, Quick Fuel 750, 407rwhp, 479rwtq
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The back of the motor has plugs. I first bought some from Summit. The machinist recommended I not install those as they were too short. He recommended some longer/taller plugs that were supposed to seal better due to more contact area with the block. They were installed by the machine shop. I can see the sealant. The machine shop fluxed the block and said there were no cracks. I think what I'm seeing around the plugs is just spray from the turbulence inside the bell housing. I'll check again the front/back of the intake, valve covers, etc. I've looked before, but haven't seen anything. I don't want to tear into the oil pan/RMS again if I don't have to.

The oil is a brownish color. BUT, I had Valvoline MTF synchromesh in there which is brown. I don't remember who told me to put that in there, but that's what it was. So that doesn't help. If I had ATF in there, I would know if it was the transmission (red) or motor (brown) that was leaking.

Anyway, I will put ATF in the new TKO600 after install. I will put dye in the motor oil. The break in procedure for the TKO is to put ATF in for the break in period (15 minutes, rowing thru the gears), drive 500 miles, then drain and put in GM Synchromesh.

I found this here on ClubCobra:

Quote:
Put 3qt of good quality ATF (Auto Transmission Fluid) (Dexron) into the transmission. Pour in through shifter mount, or through one of the top plates. You can use the fill plug on the side of the transmission also (afterall, that's what it's for!). It's just easier to pour it in from the top if you can.
Put car on jacks, run the transmission up and down through all gears repeatedly for 15 minutes. This will allow the gears to break in properly (yes, with the engine running) After 500-700 miles, drain the ATF, and put in 3qt of the GM Synchromesh fluid, the part number is 12345349.
Does anyone recommend a different procedure/fluid? I'm going to center the quicktime bell housing with a dial gauge, install the tranny, run the break in procedure for 15 minutes, then shut it down and look for leaks. If it leaks red, new tranny is leaking. If it leaks brown/dye, time for another new RMS. I'll then drive it for 500 miles and switch to GM Synchromesh. Also considering a MGW shifter. I had one on the T5 and loved it. Anyone have one on a TKO?

Thanks for everyone's help! I wanted to spend the day on the track at TCC again this year (my favorite thing to do all year in the cobra) but that ain't happening... I'm just going to take my time and do it right. I'll just be a passenger at TCC this year.

Last edited by Texasdoc; 03-22-2015 at 12:39 PM..
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