It becomes beneficial to go with the larger input shaft and forward clutch assembly whenever you're building more power into your in-line six or small-block V-8. DGC9720. And if you’re going to take care of these items, now is the time to do it. There are three basic flywheel/flexplate sizes for the small-block Ford: 141/148-, 157-, 160-, and 164-tooth. As you are seating the converter, rock it on the stator and feel for proper input shaft, pump, and stator engagement. GForce Performance Engineering Driveshaft and Axle Upgrade for our 2018 Mustang. Placing the shifter in "D" delivered a normal 1-2-3 upshift. Beginning in 1970, Ford went to a larger C4 input shaft, which changed everything from the torque converter to the forward clutch package. All you have to do is cut the dust shield for your 164-tooth application. On the right is the smaller 157-tooth flywheel bellhousing. What shape are your transmission cooler lines in? Greater Friction Moving it to 1 or 2 got you a lower gear range for slower driving or towing. Mike's Transmissions suggests dressing the drums before assembly, which improves band hook-up during upshifts. Too many transmission builders fail to take care of all of the seals during rebuilds. Our headquarters is in the USA … When we improve C4 transmission performance, we do it by getting power to the rear axle reliably. The C4 has two bands. First, you want fluid in the converter to prime the pump and ensure lubrication on start-up; second, some transmission professionals never completely change fluid due to the risk of “shocking” seals. With the changes made to the main transmission case also came changes to the tailshaft housing. Rebuild kits and performance parts for early C4 transmissions are becoming harder to come by. Now is the time to correct any engine problems. © 2021 MUSTANG 360 NETWORK MOTOR TREND GROUP, LLC.ALL RIGHTS RESERVED. If you are building an engine more for street use and cruising, a 4,000-rpm stall speed torque converter will not serve you well. Also check driveshaft, universal joints, and slip yoke condition. Believe me, a lot of us have made this mistake—don’t you make it. Particulates are trapped in super-fine filters that ensure damaging debris won’t harm your new transmission. It just isn't as large as the "C" servo, but it is plentiful and cheap. I strongly recommend against using hose between transmission and cooler. TCCP – Torque Converter Clutch Pressure . About | Contact | Terms | Privacy, How to Rebuild and Modify Ford C4 and C6 Automatic Transmission. If the transmission failed, removal is a part of learning how and why failure occurred. It was found mostly behind the 3.8L Essex V-6 and some 5.0L small-block V-8 applications. Think of the fluid as a friction material freeway, carrying this material throughout the transmission. The stall speed is the rpm range where the torque converter begins to transfer power to the transmission. So if you’re having transmission problems with a roughrunning high-performance engine, check your vacuum signal first before blaming the transmission. Before you even get started, it's important to understand the basics that make C4s different from one another. Converter pump drive should be lubricated with transmission lube prior to installation to prevent seal damage. The ring gear should be free of damage and runout. Beginning in 1965, C4s and small-blocks got a larger six-bolt bellhousing pattern to reduce noise, vibration, and harshness. Are the kickdown and shifter linkages properly adjusted? Free From Leaks We would like to show you a description here but the site won’t allow us. Update your classic Mustang’s power steering to the Borgeson power steering box and ditch the factory parts for better steering feel. Install one of these and help your transmission live. Another important difference with C4 transmissions is the vacuum modulator, which controls shifts points based on intake manifold vacuum (load and throttle position). Install A Shift Improvement Kit Adjustment should fall in the middle (as shown). These simple o-ring seals are notorious for leakage when they're overlooked. The 148-tooth flywheel was conceived for the 1975–1978 Mustang II with 302-ci V-8. For example, a 2,400-rpm stall speed torque converter begins to transfer torque at approximately 2,400 rpm. – Ford: AOD, 4R70W, 4R100, E4OD, C6, C4, 6R80 ... A618, 46RE, 48RE, TF-727, Torque-flite, 68RFE. A fresh mount keeps things secure around the driveshaft’s centerline. A good rule of thumb for transmission building is extra care. Secure linkage and tighten adjustment. Ford C4 ~185 3 speed auto (152) Small block C-6, 150 lbs, Transmission weight, drained, without torque converter 35 lb, Torque converter weight, mostly drained Ford AOD 184 4 speed auto (154) (without fluid) Ford AOD 195 4 speed auto (159) including torque convertor Ford FMX ~195 3 speed auto (154) cast iron case A carelessly installed o-ring seal can be pinched or torn, which will cause internal leakage and, ultimately, clutch or band failure. Is it the right one for your application? Install a new transmission mount in order to minimize movement around the driveshaft’s centerline. Available 3-inch premium high performance metal matrix catalytic converters (no converter flows more) Included "off road" pipes for track use. • Increased pump gear thickness improves oil pressure and volume at low RPM resulting in a cool running transmission and converter • Steel wear plates standard for the longest aluminum pump life on the market • Standard equipment on the Superglide 2 and 4! They either won’t fit the pilot or the transmission input shaft and stator. Each calls for its own bellhousing size. Shown here are two C4 intermediate servos. Torque Converter *Sales tax may apply unless you have an Oklahoma tax exempt card or a resale number. Because stock torque converters won't hold up in performance applications. lbf----12 mm head bolt-9 Oil cooler pipe union nut-25 Transmission x Engine-53 Transmission x Starter-29 Rear end plate x Transmission-13 Front exhaust pipe x Exhaust manifold-46 Front exhaust pipe x … Whenever you are building a C4 transmission, always opt for components that are matched by the pros for best performance. Never leave one to chance. First inspect the flexplate, checking for runout and ring gear damage. Replace the neutral safety/ back-up light switch if necessary. Not only must the converter slide onto the input shaft and pump stator, it must also fit squarely into the pump and engage the drive gear. The torque converter immediately transfers the engine's peak torque to the wheels. Also offering international shipments. The more clutches and plates we can add to a C4, the more bite (less slippage) it's going to have. You can use a '67-up valvebody, which gives you the P-R-N-D-2-1 shift pattern and performance. This is the time to se rvice your driveshaft and make it serviceable. Early C4 transmissions have a screw-in vacuum modulator. I’ve seen so many cars with patchwork transmission cooler lines connected together in pieces— easy spots for destructive debris to accumulate. ... We service shops of all sizes, big and small. Click the button below and we will send you an exclusive deal on this book. Hint-the larger the better. Most common flexplate sizes for C4 transmissions are 157-tooth (left) and 164-tooth (right). With more than 50 torque converter part types available, our powerful search filters make it easy to find exactly what you’re looking for. 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