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> Transmission Soda, Bead or Walnut Shell Blasting
kconway
post Mar 9 2010, 06:43 PM
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I was wondering if it would be safe to soda, bead or walnut shell blast my transmission whole if I taped off the vent and perhaps the part lines in the case as to not hit the seals? I have a newly rebuilt transmission I'd like to clean up without tearing back down again.

Kev
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McMark
post Mar 9 2010, 06:47 PM
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Soda would be the only thing I would even consider shooting at a running transmission. But I strongly lean toward it being a bad idea in any case. I've seen first hand how amazingly effective blasting is a sneaking into 'taped off' passages. Before I saw it myself, I didn't believe people who told me tape was never enough.

Tape is never enough. (IMG:style_emoticons/default/sad.gif)
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VaccaRabite
post Mar 9 2010, 06:52 PM
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no.
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Tom_T
post Mar 9 2010, 07:03 PM
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Kev -

Maybe just some POR Marine Clean away from the openings for oil/grease & crud, possibly corrosion with a fine wire brush or 000/0000 steel or brass wool.

Someone else asked about a protective coating, so maybe use a HT clear on it when done, after full prep of the surface.
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bandjoey
post Mar 9 2010, 07:11 PM
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Harbor Freight sells a spray bottle that attaches to your air hose. Put in straight Purple Cleaner from the FLAPS and spray away. It eats up crud in a hurry, but BE SURE to protect your eyes, and all painted surfaces, and use the garden hose to rinse everything down in just a few minutes. Then in the honor of 914's , fill the bottle with fresh 20w50 and give it a new clean coating. (IMG:style_emoticons/default/lol-2.gif)
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kconway
post Mar 9 2010, 08:10 PM
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Truth be told, the DACO (Dumb Ass Current Owner) that'd be me rattle canned it. Instead of waiting for it to flake and drip off on my garage floor I'd like to undue the damage before it goes back into my car. I did use high temp paint... (IMG:style_emoticons/default/blink.gif)

Whadda Bonehead!
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Tom_T
post Mar 9 2010, 08:48 PM
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QUOTE(kconway @ Mar 9 2010, 06:10 PM) *

Truth be told, the DACO (Dumb Ass Current Owner) that'd be me rattle canned it. Instead of waiting for it to flake and drip off on my garage floor I'd like to undue the damage before it goes back into my car. I did use high temp paint... (IMG:style_emoticons/default/blink.gif)

Whadda Bonehead!


Try Acetone - apply - wait a few to soften paint - tooth brush in crevices & scrub brush - repeat as necessary!

DAPO &/or DACO did that with paint on my used Fuchs 2L (former), & on body plates & labels on past repaints (both) on mine! (IMG:style_emoticons/default/biggrin.gif)
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McMark
post Mar 9 2010, 09:52 PM
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Brake cleaner usually takes off rattle can paint RIGHT NOW! (IMG:style_emoticons/default/biggrin.gif)
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bigkensteele
post Mar 9 2010, 11:24 PM
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While I understand the apprehension to condone full soda blasting of a newly rebuilt transmission, can we not agree that 90% of the unit could safely be blasted without risking soda being introduced into the internals? And even if some of it did make it inside, would it cause much damage, given the tiny size of the crystals? If you saw what was clinging to the magnetic drain plug of the tranny I just rebuilt at the Dr's clinic, Soda would not worry you in the least.

I plan on soda blasting mine, coating it with whatever the consensus is on the other current thread and changing the oil twice in the first 2000 miles. If it fails after that, I will make an appointment with Dr. Evil and bring my tranny into his exam room for advice. The flimsy paper that they roll over the table might not absorb all of the oil, but that will be his problem.
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McMark
post Mar 9 2010, 11:30 PM
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I agree that soda is probably safe. I won't be doing it to any of mine, but I'm not against it.
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Mark Henry
post Mar 10 2010, 02:34 AM
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I'd just stick it in and the 914 automatic corrosion prevention system (engine leaks) will do the rest.
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ME733
post Mar 10 2010, 07:36 AM
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....Use as mcmark suggested- brake cleaner- first,... then finish up with pump spray bottle of MAG WHEEL cleaner., watch it foam off the last of the oil and put a shine/original look back to the tranny....got to be careful tho-certain mag wheel cleaners will DARKEN if left on too long.....start at 5 minutes and judge results., flush with lots of water when done...........................M.M.
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VaccaRabite
post Mar 10 2010, 07:38 AM
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QUOTE(kconway @ Mar 9 2010, 09:10 PM) *

Truth be told, the DACO (Dumb Ass Current Owner) that'd be me rattle canned it. Instead of waiting for it to flake and drip off on my garage floor I'd like to undue the damage before it goes back into my car. I did use high temp paint... (IMG:style_emoticons/default/blink.gif)

Whadda Bonehead!


If you did any prep work at all, it is going to take a long time for the paint to fail.

My old transmission was painted (not by me) and looked great for a long time. Too bad the insides did not look as good as the outsides.

Stripping a working trans is going to cause you more problems then it will solve, IMHO.

Zach
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sean_v8_914
post Mar 10 2010, 08:23 AM
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I put my complete trans in my jet wash cabinet. stood it on its bell housing, wrapped teh vent in 5 wraps of electric tape and put a hose clamp over it. 175 deg, rotation, 200 psi and good soap= clean box. no water got in.
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sean_v8_914
post Mar 10 2010, 08:24 AM
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soda is an abrasive. does it disolve in oil?
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tdgray
post Mar 10 2010, 09:10 AM
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Back the cart up boyz... some of you are saying that you would soda blast carbs... but would not do a tranny that is 99.9% sealed up... riiiiggght.

Personally I see no problem blasting the great majority of the case as soda essentially destroys itself on contact leaving very small particles.

Of course I am no expert but from the research that I have done in the last few weeks I have seen people blast engines, trannys, rear ends etc and have not heard of a "shit I should not have done that" moment.


I dunno (IMG:style_emoticons/default/confused24.gif)

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McMark
post Mar 10 2010, 09:18 AM
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I wouldn't blast assembled carbs and then throw them on a motor either. (IMG:style_emoticons/default/rolleyes.gif) Apples to apples, my friend.
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VaccaRabite
post Mar 10 2010, 10:08 AM
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When I blasted my carbs, the were out of the car and taken apart. I would never blast carbs together, put them back on the engine and expect them to run.
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Eric_Shea
post Mar 10 2010, 10:15 AM
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I've personally seen walnut. It gives "perfect", "like new" results.

Also... be VERY careful in the solvent you use on the tranny. Engine degreaser will pit the mag RIGHT NOW. Make sure what you use to get it initially clean will not pit the surface.
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sean_v8_914
post Mar 10 2010, 11:19 AM
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YES!!! even oven cleaner will eat it if left on there more than 15-30 min. my parts wash has special sauce to prevent this but must be rinsed off ASAP. I spray them with wd 40 to keep fuz from growing
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