transmission clean up and paint

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mad dog

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Good morning, While im waiting for the 340 rebuild at the machine shop I thought i would send the 727 out to the tranny guy for a rebuild.
Im detailing this car pretty nice so i would like to clean up and paint the 727, my question is do i de-grease/sand/and paint it before i send it to the trany guy or after?
also any tips or recommendations are welcomed, thanks FABO...Rich
 
I'm not sure which would be better. I'll guess after the build. One thing I would do after prepping is to use an etching primer before painting for better adhesion and longevity.
 
can i set the tranny upright while i prep and paint?...or will that harm the tranny somehow?
 
mad dog said:
can i set the tranny upright while i prep and paint?...or will that harm the tranny somehow?
Click to expand...
Sure, but make sure that it is drained completely unless you prefer
red sneakers.

I clean the exterior before rebuilding it as it is much easier and neater
to work on.

They did not paint them from the factory although most racing trans builder
paint them (My ProTrans units are Gloss black).

X2 on priming trans (and engine) prior to painting = It makes a difference.
 
Paint it after it is rebuilt.

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Thanks for all your help, I guess i will degrease it before i send it out and then paint it after the rebuild.
 
If you are set on painting it, I would actually talk to the builder first and let him know your plans. Degreasing, wire brushing, and scrubbing are all ok before the rebuild but you don't want it to sit around too long before disassembly and rebuild in case water gets inside and starts rusting the steel parts. Also, some builders use a parts washer after disassembly to quickly clean the parts. If they are going to run the case and tail housing through a parts washer you probably don't want it to have fresh paint on it as some may come off. They may let you take the case and tail housing for a good scrub after disassembly.

Painting after the rebuild is a good idea because as said above everything can be very clean after the rebuild, but then you'll need to do a careful clean and degrease again before paint. There is often finger prints or drips of trans fluid on the outside after handling the parts.

Finally, make sure to tape off any openings before painting. Don't really want paint on the inside.
 
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