C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Install drain plug into tranny pan...

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Old Jul 16, 2008 | 05:03 PM
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Default Install drain plug into tranny pan...

Anyone ever done it? Any pics?

My Jimmy has the same tranny as the '94, and I need to know where to poke/drill a starter hole. Preferably where the drain is gonna' mount!

The fluid is pretty new, and has hi-$$$ additive in it, that's why I wanna put it back in afterward...
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Old Jul 16, 2008 | 05:09 PM
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First drain the fluid and remove the pan, then drill a hole on the backside of the pan, not on the bottom where it can get ripped out if something kicks up and hits it.
Last part instal the sleeve and the backing nut, I sealed mine with an oil pug gasket from NAPA on the inside, then a small bead of "The Right Stuff" on the outside. No leaks, no runs, no problem
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Old Jul 16, 2008 | 11:34 PM
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Is this a rebuild, add a drain plug or just a filter change? How long has it been in there? If its that new, why change it?
Either way, I would NOT put the same oil back in. Additives are to break things like buildup of sludge/metal particles loose and you are going to put the oil back in?

Good chance to change to Royal Purple and you don't need an additive and RP will mix fine with any old oil left in your cooling lines/inverter. The inverter holds a lot of oil and at $9-$10 a qt., you don't want to change the inverter oil unless you are replacing the inverter.

Remember, the Vette sits very low to the ground and a good chance you might drag the drain plug and break it off or bend the pan and ruin the tranny. Put it low enough to drain, its low enough to drag.

Last edited by Eddie & the Cruisers; Jul 16, 2008 at 11:40 PM.
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Old Jul 17, 2008 | 01:12 AM
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Dang, I should have read your other post about changing the filter before I jumped in here making a **** of myself. I'd say, you (us) really DO need a drain plug in that pan.

If you would write a book on vette repairs/service, I'd buy a copy. Sooooooooo funny!

Last edited by Eddie & the Cruisers; Jul 17, 2008 at 01:14 AM.
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Old Jul 17, 2008 | 01:25 AM
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Originally Posted by Eddie & the Cruisers
Dang, I should have read your other post about changing the filter before I jumped in here making a **** of myself. I'd say, you (us) really DO need a drain plug in that pan.

If you would write a book on vette repairs/service, I'd buy a copy. Sooooooooo funny!
Yeah...my MISTAKES are funny alright. Cause I make plenty of 'em!:o
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Old Jul 18, 2008 | 10:50 AM
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If you are going to put in a cheap drain plug, I would go to the parts store and buy a replacements oil drain plug then take the plug and the pan to a machine shop and have them install it the correct way with welds around the tapped support washer.

Sure you COULD get the cheap-o installed fine without leaks, but its going to look like crap and I'd say your chances of having a leak are more then 50-50. This is just me though. I would rather make sure it's right the first time. Call me crazy.
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Old Jul 18, 2008 | 12:47 PM
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I bought a pan with plug to drain, works well. Just an idea!
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Old Jul 18, 2008 | 12:51 PM
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An probably pretty similar in price to my previous suggestion
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Old Jul 18, 2008 | 01:30 PM
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This is how I did it, but it requires welding!





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Old Jul 18, 2008 | 01:42 PM
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Originally Posted by 1bdvet
I bought a pan with plug to drain, works well. Just an idea!
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Old Jul 18, 2008 | 01:48 PM
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Originally Posted by Sliding
This is how I did it, but it requires welding!
The side drain I like, like E&C said earlier, with the weld. Yeah, I did get a cheapo; it's for the Jimmy 4L60e - same as the '94.
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Old Jul 18, 2008 | 03:10 PM
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I installed a B&M drain plug in both my car's trans. About $5.00 at PepBoys. No welding required. No leaks in years. Botttom mounted for full drainage. Pretrudes less than 1 inch. I pulled the pan and drilled the hole with a step drill bit, which deburs the hole at the same time. I don't buy these horror stories.
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Old Jul 19, 2008 | 02:35 AM
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If your car isn't lowered there should be plenty room on the bottom. I installed mine on the rear because it's drain plug/ATF temp sender at the same time.
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Old Jul 19, 2008 | 07:03 AM
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...i would save the orig pan and get a used one and install the drain in that one.......
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