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1959-64 700-R4 TRANSMISSION

1959-64 700-R4 TRANSMISSION


One of the most popular conversions is modernizing the transmission. Installing a TH350 into a 1959-1964 is not much of a problem. A little work on the stock transmission crossmember and the drive shaft will get you there-but the TH350 still only has the 1:1 ratio in third gear. After installing an engine, we will convert the transmission to 700-R4 using our new 700-R4 transmission crossmember. With the 700-R4 transmission in fourth gear, engine RMPs will decrease by 700, which will improve fuel economy, reduce road noise and greatly reduce the wear and tear on the drivetrain (an additional 200 RPM reduction can be achieved by using the lock up torque converter).

Get in gear, follow along-All of the guess work of the 700-R4 conversion has been eliminated and everything will fit into the car perfectly by using this bolt-in crossmember, TVl/detent cable, and dipstick and tube.

Parts List
1962 Chevy Impala 2-Door Hardtop Weatherstrip Kit replaces missing or worn original
1962 Chevy Impala 2-Door Hardtop Weatherstrip Kit replaces missing or worn original
1958-1966 Chevy Automatic Transmission Cooling Lines TH700R4 to replace worn or missing original
1955-97 Fly Wheel
1955-72 Flex Plate To Crank Bolts & Nuts
1965-69 Small Block Engine Mount
1958-72 Turbo Hydra-Matic 200/350/700R4 (TH200/350/700R4) Automatic Transmission Tailshaft Mount
1958-1972 Chevy Driveshaft Yoke Turbo Hydra-Matic 200 & 350 & 700R4 to replace worn or missing original
1955-72 700R4 Automatic Transmission Flex Dipstick & Tube
1955-72 Turbo Hydra-Matic 200/700R4 TVI Automatic Transmission Detent Cable
1955-72 Detent Bracket For Cars With Carburetor
1955-64 Detent Cable Pin
1958-68 Speedometer Cable Assembly
1955-67 Turbo Hydra-Matic Column Shift Linkage Kit

Tools Needed:
9/16" Wrench
3/4" Wrench
Drill
3/8" Drill Bit
15mm Wrench
C-Cliamps
Cutters
Thread Locker

Time Frame
8 Hours

Image #1: Our engine is back from the machine shop and we are ready to set it into the frame along with converting to a 700-R4 transmission. The flywheel, PIN 508431, is bolted to the crankshaft with six 7/16" fine-thread bolts flywheel bolts, PIN 534045. These bolts come with serra ted washers, but for extra security, we recommend applying drop of thread locker to the threads. Torque each bolt to 65 lbs.

Image #2: The rubber side engine mounts, PIN 518302, bolt to the side of the engine with three 3/8" x l" bolts with lock washers.

Image #3: The rubber side engine mounts will mate up to the brackets on the the front engine crossmember and are 3" bolt with flat washers, a lock washer and nut).

Image #4: The torque converter is always insta lled in the transmission first, never bolt the converter to the flywheel and then slide the transmission up onto it. Make su re the converter is all the way into the transmission by holding a straight edge across the front face of the bellhousing. The snout of the converter should be about 1" away from the straight edge.

Image #5: Now raise the transmission up into the frame. We found by dropping the E-brake lever assembly out of the way the installation of the transmission is much easier.

Image #6: Using the six 3/S"xl" bolts and lock washers from the 700-R4 bolt kit, P;N 534045, bolt the transmission to the back of the engine_. Now that transmission is bolted to the back of the engine, the engine hoist can be removed from the engine.

Image #7: The 700-R4 bolt kit, P;N 534045 , also includes the three metric torque converter bolts. These bolts pass through the flywheel and bolt into the converter. The bolts come with a small amount of thread locker to help secure them in place.

Image #8: On most 700-R4 transmissions, the rear transmission mount, P;N 519136 , will mount to the main case just behind the pan, not on the tail shaf t housing like a TH350 or TH400. The 700-R4 bolt kit, P;N 53404 5, also includes the two metric bolts and lock washers to hold the rear mount into place.

Image #9: Next bolt the new tubular transmission crossmember for the 700-R4, P;N 519096, to the transm ission mount using the two 7/16"xl" bolts and lock washers supplied the bolt kit.

Image #10: There are left and right elbow brackets (included in the crossmember kit) that will bolt to each end of the crossmem ber tnat will then mount to the frame. The elbow brackets act as a shelves for the crossmember and have slots for lateral adjustments because of variations in frames. The brackets are held to the crossmember with a l/2"x 3" bolt that has thin flat washer on the top and a 1/4" thick washer and lock nut on the bottom.

Image #11: A new front yake, PIN 564029 needs to be installed onto the drive shaft. The Front drive, shift will need to be shortened to allow for the longer transmission. Slide the new yoke into the rear of the transmission. Using a transission jack, raise or lower the transmission until the drive shaft is dead in the center of the large hole in the front of the frame "X".

Image #12: With the drive shaft centered in the hole in the "X" of the frame, clamp the elbow brackets in to place Using the holes in the elbow brackets as a guide, mark the frame and drill two holes through the inner and then the outer wall of the frame.

Image #13: Two 3/8"x5" ca rriage will ho ld the elbow brackets to the frame, the bolts will pass through the frame from the inside.

Image #14: There are plates that are used on the out side of the frame to support the frame where the carriage bolts pass through.

Image #15: The plate is held in place with flat washers, lock washers and nuts.

Image #16: Now with the transmission in place the emergency brake assembly can be reinstalled onto the frame. The front emergency brake cable will run over the top of the new transmission crossmember.

Image #17: The dip stick and tube for the 700-R4,PIN 519126, fits right beh ind valve cover (on the the passenger's side). The tab on the dipstick tube bolts to the upper bell housing bolt.

Image #18: The TVI/detent cable, PIN 564032, will attach to the bent wire in the transmission and is held to the case with one 6mm bolt.

Image #19: The TVI/detent cable bracket, PIN 563167, is bolted to the two rear intake bolts on the drivers side of the engine.

Image #20: The cable will clip into the bracket.

Image #21: Next inst all the TVI/detent cable pin, PIN 564034, to the carburetor arm.

Image #22: The 1VI/de tent cable has a plastic hook that attaches to the new pin on the carburetor.

Image #23: With the engine OFF, hold the throttle wide open and pull the cable tight. There is a barrel lock with a set screw, slide the barrel lock up to the plastic clip and tighten the set screw. The 1VI/detent will control the shift points on the transmission, a cable that is not tight will shift the transmission at a lower speed and a tighter cable will shift the transmission at a higher speed.

Image #24: Th e prebent cooler lines, PIN 519097, will save you all the aggravation of bending a set of lines. The lines will attach to the transmission on the passenger's side and to the stock fittings on the radiator.

Image #25: The speedometer cable, PIN 519072, will attach to the rear of the transmission on the drivers side and the instrument d uster at the dash board.

Image #26: Our project car is going to have a console with a floor shifter , but if the stock column shift is going to be used, PIN 563165, is the one piece linkage that will attach from the column to the transmission.

Diagram #1: With the 4th gear in the 700-R4 you have now gained a 700 RPM drop in high gear. If yo u want to put the icing on the cake and hook up the lock-up torque converter

Now fill the transmission up with fluid and start the engine, check for leaks. With rear tires raised from the grou nd, run the transmission through the gears, then check the fluid again and fill if necessary. Next take the car for a test drive and make any adjustments to the 1VI/detent cable.

Enjoy your updated Classic, now equipped with a modern four-speed overdrive.

Jul. 2011

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