Description

Chrysler A-670 Technical Manual

If you’re trying to rebuild a Chrysler A-670 Technical Manual transaxle without the factory documentation, you’re going to waste time and money. I’ve seen guys chase a no-shift condition for three days because they used a reprinted valve body diagram that had the check balls in the wrong spots. The A-670 manual from ATSG is the real deal – 86 pages of the same information Chrysler sent to dealers. It’s not a reprint; it’s a licensed technical booklet with official illustrations.

You need the torque converter-to-driveplate bolt spec? Page 73. You need the valve body bolt torque sequence? Page 26. That’s where the real data lives – not on a forum post from 2005. The manual gives you required tool lists for every major step and shoves safety warnings right up front – page 4 says wear safety goggles. That’s the kind of reminder even old-timers need.

Index: What’s Inside the A-670 Manual

The table of contents starts with General Information (page 4), then Diagnosis & Testing (page 6) backed by a Diagnosis Guide (page 13). Adjustments, Service, and Removal sections follow. The Valve Body section begins page 26 – it’s the heart of the transaxle. Teardown and Assembly starts page 31, and the Oil Schematics (page 41) are the most detailed I’ve seen outside a factory engineering print. Bearing Adjustment (page 69) gives you the shim procedures. Specifications (page 73) is your cheat sheet for every torque value. Finally, Transmission Identification (page 76) helps you confirm you have the right unit before ordering parts.

Diagnosis & Testing – The First Place to Start

Before you pull the pan, run through the diagnosis steps. The manual covers shift complaints, lock-up issues, and fluid pressure tests. Don’t skip the Diagnosis Guide on page 13 – it lays out symptoms and probable causes in a table. If you have a no-upshift, it tells you which valves or solenoids to check. This is the kind of structured thinking that saves you from throwing parts at it. Aftermarket guides skip this entirely and jump straight to teardown, which is how you end up with a bench full of parts you didn’t need.

Valve Body Service: Page 26

When you get to the valve body, this manual gives you an exploded view with part numbers. It tells you the exact length of each bolt – because swapping a long bolt into a short hole cracks the casting. You’ll need an inch-pound torque wrench for the valve body bolts – 35–45 in-lbs depending on the revision. The manual lists the required tools. No guesswork. Page 26 also includes the control pressure regulator valve detail, which is a common source of line pressure problems on the A-670.

Oil Schematics – Trace the Pressure Paths

The Oil Schematics on page 41 are worth the price alone. They show the hydraulic circuits for each gear range – reverse, drive, manual low. If you’re diagnosing a delayed engagement, you can follow the line pressure, the governor pressure, and the throttle valve circuit. Aftermarket manuals blur these diagrams or reproduce them at a resolution that makes the passages invisible. This one is crisp and labeled with Chrysler’s own designations. Understanding the lock-up solenoid circuit is impossible without these schematics.

Specifications on Page 73 – Torque and Adjustments

Page 73 is the specs page. You get torque values for the converter housing, transfer plate, case bolts, and final drive bearing preload. All in ft-lbs and in-lbs – Imperial units as they should be. This is not a conversion from metric approximations. These are the factory numbers. Without them, you risk stripping threads or causing leaks that take the transaxle back out of the car. The manual also gives fluid capacity: ATF Dexron II, 4.5 quarts for a dry fill. That’s the kind of spec you need before you start filling.

Source – ATSG vs. Aftermarket

This manual is published by Automatic Transmission Service Group (ATSG) with cooperation from Chrysler. The illustrations and data are licensed – not scanned from a dirty photocopy. I’ve seen aftermarket manuals that list the wrong check ball location and cause a 2–3 shift flare. This one is correct. If you want to learn about manual transmission basics, that’s a different subject, but for the A-670, stick with the factory-sourced document. When overhauling any transaxle, reference the manual transmission overhaul guide for related procedures, but the A-670 has its own quirks – like the lock-up solenoid circuit – that only this manual details.

Does this manual cover both the A-413 and the A-670?

It covers both A-413 and A-670, but the A-670 has specific lock-up solenoid info.

Does it include torque converter removal procedure?

Yes, the Teardown section starting page 31 covers converter removal, disassembly of the clutch drums, and final drive. You’ll need a slide hammer for the output shaft bearing, and the manual lists the correct tool numbers. The oil schematics on page 41 are critical for understanding the lock-up apply circuit. Without them, you’ll struggle to diagnose a torque converter clutch shudder. The manual also gives the end-play specifications so you can shim the differential correctly. This is not a generic rebuild guide – it’s the actual procedure used by Chrysler dealers.

Stop trusting internet forums and aftermarket PDFs that are missing pages. AutoRepairManuals has the largest collection of OEM shop manuals in North America, and this Chrysler A-670 Technical Manual is a verified factory spec document. Access the Factory Manual now and get the data you need to finish the job right the first time.