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

Overdrive capacity + wheel question.

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Old Jul 4, 2010 | 07:27 PM
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Default Overdrive capacity + wheel question.

Hi,

87 Vette with the 4 + 3 trans. Anybody know how much fluid the overdrive takes when changing it?

Also, the clear coat is about half gone on my (original) wheels. What is a good way to take the rest of it off without damaging the wheels??

Thanks!
vettebob
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Old Jul 4, 2010 | 08:30 PM
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I seem to remember the overdrive takes about almost 2 quarts, and you have to fill it to the plug hole anyway, so just have a little pan or rag ready, and be quick with the plug.
On the clear coat, you have to take the tire off the wheel and use high strength paint remover.
Be sure to check the wheels for cracks on the back side. It would be a shame to go through all that work, and then discover a crack just before putting the tires back on them
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Old Jul 4, 2010 | 09:00 PM
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If you use low air pressure to blow out the lines to the radiator, you will need just over 2 quarts of Dexron III ATF for a refill. If you remove the fluid out of the lines, fill the OD then rotate a rear tire by hand for about 2 minutes, then top off the fluid level.

The filter is the same one used in a Ford FMX transmission filter that was found in early 70's Torino's, Cougars, a few Mustangs and some versions of F-150's.
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No need for a cork gasket; use a good RTV and apply a 3/16" bead around the pan rail and tighten all of the bolts equally.
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Old Jul 4, 2010 | 09:36 PM
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Ok, thanks guys! (Happy Fourth of July!)

vetterobert
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Old Jul 5, 2010 | 10:40 AM
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I made a pan gasket out of a cereal box, and used the "right stuff" and no pan leaks.
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Old Jul 5, 2010 | 01:25 PM
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Your wheels are wet painted.....You can sand and paint them...

Or if you want a polished look, take it to your nearest chrome plater and ask if they can give you the right finish...Not knowing where you live it is tough to make recommendations

Magmasters here in SoCal have a way to polish while the tire is still mounted.

What type of wheels do you have?
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Old Jul 5, 2010 | 02:29 PM
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Hi,

Yeah, I think I will make a gasket as well. Never was a fan of using just silicone to "make" a gasket.

The wheels are the original C-4 Corvette wheels. I live in Mexico, so I am on my own for refinishing them. I would just like to get the paint off (remaining clearcoat), and maybe give them something of a "brushed" finish for now. Might polish them later...

Thanks,
vetterobert

Last edited by vetterobert; Jul 5, 2010 at 02:35 PM. Reason: correction
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Old Jul 5, 2010 | 03:30 PM
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Normal paint stripper will remove the remaining clear coat without a problem. If the clear coat has peeled/chipped off some time ago you will see noticable discoloration between the recently stripped aluminum and the old bare aluminum.

I've had great results with Napa Aluminum brightener for BARE, unpolished aluminum. http://catalog2.genpt.com/catviewer1...28284&Ne=25000
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Old Jul 5, 2010 | 03:32 PM
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(to the OP) Well, you are shooting yourself in the foot by using the gasket. If you follow the instructions for using just RTV for just a gasket, your end results will be more satisfactory.

The clear coat.....you can wet sand them until the slightly opaque clear coat is really thin...then respray clear back on top. Once you get to the Aluminum, you have to either polish or re-cut the surface. If you re-cut the surface on a lathe, you need an indexer and a template to cut your wheels....it's a huge process.
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