Automatic transmissions

this is a automatic transmission with the oil pan off, for that we had to unscrew bolts and placed them together in a ice cream container so we dont lose any, all the parts are labeled so you know what thier called,

this is wat the transmission looks like wit all the parts out and tha output shalft off,

this is where the input shaft fits in and were servos,brake bands,parking gear,valve body and planetary gear set. it was quite tricky to pull the brake bands out but we managed. the planetary gear set was a lil heavy for its size.

this is the input shaft, this connected to the torque convertor, to open this up we took of a couple screws and inspected if thier was any fault or sign of wear and tear on th 



this the valve body, pretty much the heart of the transmission. A valve body pretty much contains small hydraulic pistons and cylinders.The Fluid enters the cylinder under pressure and forces the pistons to move to engage the bands or clutches.




In the photo are the oil feed pipes which carry the oil from the valve body,we had to be really carefull with cause you cant buy them, thier all custom made and if any one of them gets damaged. you wil hav to make it.




this one of the servos,the servo helps control the brake bands,mostly for high gears like 3rd and overdrive. it works by the fluid pressure from the valve body and is a spring loaded assembly.



this is just another photo of the servo from top tho. you can see the spring i was taking about in the last photo, it was easy to get out of the transmission case but had a lota grease on it, thier was a lil piece of metal which goes between the servo and the brake, we had to be really without and made sure me did'nt lose it.



this a govener its job is to sense the speed, it goes on the output shaft, this had to be the easiest part to get off, but the most amazing one, how this can tell what your speed is. i found it quite suprising.




this the planetary gear set, with the sun gear in it, this was the most trickest part to get back in the transmission when we finshed, the planetary gear set is one of the most importants parts in a automatic transmission as it creates all the different gear ratios,



this inside the planetary gear set, after we took the sun gear out. you can see the gears around the sun gear, i found quite simple why its called a planetary gear set, thier positioned like the sun and the planets around it.



this is just another photo of the planetary gear set with the sun gear.




this the front clutch, with it brake band around it. this had to be the most annoying part to put back, with all the plates inside it, they all had to be in a straight line, it was quite fustrating, but we used a small screw driver to allign it all up.





this the brake band which goes over planetary gear set assembly, this is also controlled by a servo, we didnt have much problem with taking the brake bands out, exepct they got stuck at time inside the transmission case,




this the case for the output shaft, it only had about 4 bolts that need to be opened.





this the oil pan, this had 14 bolts, it holds the oil in the transmission.




this is how the parking gear and planetary gear set sit inside the transmission, the gear jus above my hand is the parking gear. which as a lil clip which locks it when you put the car in park.

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this the sun gear, it fit in planetary gear set, and is a quite important part.