Reverse Servo Piston.

[MusPuppis]

Yeah.. So, Im an idiot.

I pulled my transmission (AOD) apart to do a little rebuild on it and was checking the servo pistons. Well, I didnt know the reverse piston lifted right out and like the idiot I am I tried to use a thin peice of metal to slide in between the servo piston and the wall and pry it out that way. All I succeeded in doing was damaging the ring of rubber around the piston.

I didnt think it was a big deal at first but I got out my shop manual to get the part number and noticed something a little depressing.. The ring doesnt seem to have its own part number. Just the servo piston itself is listed.. which leads me to beleive I have to replace the whole thing. Now, I doubt its very expensive but I am on a TIGHT budget right now and need to save every dollar (literally) I can to get this thing running so it could potentially be a major set-back.

So, my question is, Am I right in assuming I'd have to replace the whole servo piston and the little rubber seal cant be bought by itself? Also, anyone know what this could potentially cost me? And finally.. Is there anywhere online I can look up part numbers and such?

Anyway, thanks for reading and thanks in advance for any help you may be able to give me.

 

[crazypete]

No dude, they have rebuild kits that go for about 70 bucks. There's a company in NH called transtar where I got it from. It's one of countless seals that come with a kit. Give them folks a call and ask them. They were able to provide me with individual bands and such when I needed them.

http://www.transtarindustries.com/prod1.asp

All that rubber seal does is keep fluid up inside the cavity made by the piston top and the sliding section that comprises the piston stem. You might be ok since the clearance is next to nil anyway and there's a snapring that might hold the pressure back in and of itself. You wont leak much past that seal. You might lose a few PSI in reverse to hold the band in place. Just take it easy in reverse and you should be ok.