At Oregon Performance Transmission, we are constantly adding new items from such companies as Hayden, Alto, ATSG, Transgo, Sonnax, Superior / Fairbanks, Tru-Cool, and many others. OPT not only has a full range of high performance rebuild parts like a billet servo, boost valve, or high stall torque converter, but a huge selection of stock rebuild parts for almost every make of automatic transmission.

We have every part needed for a street to full strip TH350, TH400, and Powerglide Transmission. Don't forget your high stall torque converter and shift kit, or billet servo. We have a high stall torque converter for the TH350, TH400 & Powerglide from stock to 7500 RPM high stall speed.

If you are looking for better shifts from your GM 700R4 or 4L60E Corvette, Camaro, Truck, etc, we literally have hundreds of different parts available. We also have a large selection of 2004R parts available. From a billet servo to boost valves, or high performance rebuild kits, we will have your 700R4, 4L60E, & 2004R back on the road or track.

Ford mustang guys are covered in our AOD and AODE / 4R70W sections. We also have an E4OD / 4R100 section for the truck guys. We'll make your overdrive AOD, AODE, 4R70W, E4OD, or 4R100 shift the way it should. Don't forget to upgrade your E4OD or 4R100 with a HD billet torque converter, or a high stall torque converter for your AOD, AODE or 4R70W.

Dodge truck owners will want to check out a billet torque converter, shift kit, rebuild kit, or billet servo for their A727, A518, A618, or the new 48re. The A618 and 48re diesel trucks will really benefit from the upgrade to the billet torque converter and Transgo shift kit.

If you need help identifying your transmission, please visit our Transmission ID page. If you know which transmission you have be sure to check out our ATSG Transmission Service manuals.

Also check out our line of Lubegard products. We carry not only transmission fluid additives, but products for engine, radiator, and rear-end fluids.

Which transmission do I have

Be sure to browse our full line of ATSG transmission service manuals. ATSG has manuals for popular models such as 4L60E, 700R4, E4OD, C6 and TH350 but also the more uncommon models, both foreign and domestic. Go to our ATSG page to find the service manual you need.

General MotorsFordDodge/Jeep/Chrysler








Allison T1000




AODE / 4R70W

E4OD / 4R100


4R44E / 4R55E / 5R55E




A518 / A618