The Overdrive transmissions are a bit different. Click the button below and we will send you an exclusive deal on this book. You need a pressure gauge 0 to 100 psi screwed into the throttle valve pressure port on the passenger side of the transmission case. The cable should be slack, with the throttle closed and the accelerator linkage relaxed. Keep in mind these adapter kits alter the transmission mount location by 1 to 2 inches toward the rear of the vehicle.
If both adjustments are where they should be, the throttle valve lever just inside the transmission is just touching the throttle valve without any pressure. Would not have made it without those tires. Foaming creates air in the fluid, undermining hydraulics and lubrication. We are making the assumption that your vehicle has the original type transmission that was installed at the factory. While there is some speculation that the 70 can be multiplied by 10 to indicate the ft-lb of torque this transmission is capable of handling including torque converter multiplication, i. This Tech Tip is From the Full Book,.
This is a 1997 4R70W with a speedometer drive and output shaft speed sensor. Make sure to keep in upright to avoid the rod falling out and everything falling apart. Most of the improvements have to do with shift control via the valve body. When you fire up the engine, listen for any abnormal noise and be prepared to immediately shut it down if you hear something. Soft shifts are a strong indication of slippage, which means you are burning clutches and bands. Moe works hard to bring a deal together that works for you. The staff is very courteous, and always make sure I understand what work was performed, and what work may be required in future visits.
Bronco Grave-yard is yet another source. The Ford Motor Company has produced a wide range of automatic transmissions in past decades and are sure to continue improving on the technology employed in their vehicles for decades to come. It also has the benefits of two gearsets in one, which offers some weight reduction and engineering simplicity with fewer parts. Kyle and his team continue to offer friendly, courteous and professional service. Check the fluid again as the sump warms. Other improvements include a 2 inch wide overdrive band, larger overdrive servo, stronger input shaft, and lockup converter clutch rather than mechanical, gear-dependent lockup.
The 3-4 shift accumulator was phased out in the 1989 model year due to leak issues. Step 1: Verify Torque Converter Fitment Before installation, check torque converter dimensions. Any post-88 version is worthy of use or build-up except those found behind V6s. Although unable to in its factory configuration, it is possible to modify the valve body to achieve converter clutch lockup in 1st gear. When you add fluid for the first time, bring it up to just below normal range on the dipstick. To adjust the self-locking rail adjuster, push in on the lock, which releases the notched rail and allows you to move the notched rail back and forth to adjust cable tension. At idle throttle closed , you have low line pressure, which is what you want during deceleration and light throttle.
It is more plausible that the number indicates the torque handling capability in N-m, as 506 lb-ft converts to 686 N-m which could be rounded to 700 N-m. Look for the Ford casting number on main cases and valve bodies for an indication of when the part was produced. Peter is always there to ensure we are happy. In most cases, if your vehicle has been converted from an overdrive to a 3-speed, you can still use this guide for identification. All of the C-series' transmissions essentially have square pans, however, the C3 has a recess on the rear passenger side, the C4 has a bulge on the front passenger side corner, while the C6 has a recess on the rear passenger side that faces the rear of the vehicle.
C4 bell housing is removeable, C6 is not. If you have a choice, this is the best setup to use because Ford has done all of the engineering work for you. This is the pressure control solenoid, which is a large, heavy electro-magnet that pulses to control system pressure. It involves modifying the valve body separator plate and gaskets as well as changing or removing accumulator springs to alter the shift timing of the transmission. If this is the case, you have to remove the transmission and inspect for damage. In 1998, due to durability concerns, the intermediate one-way roller clutch was replaced with a mechanical diode providing extra holding capacity and longer service. The vacuum modulator finitely controls line pressure.
Ideally, you have a nice balance of line pressure and shift timing. Be prepared to change the manual shift linkage around to fit your application if needed. With the throttle at idle stop and the throttle valve lever inside the transmission just touching the throttle valve, you should see 5 psi. Relax the throttle to get overdrive lockup and fuel-efficient direct drive between torque converter shell and output shaft. Soft and sloppy early shifts mean poor adjustment. Make sure the pressure gauge hose is well away from hot exhaust pipes.
With low line pressure, there is no cable tension throttle closed and virtually no shift felt slippage. Always have a driveshaft dynamic balanced. According tio Kelly Hot Rod, many Ford Automatic transmissions, especially the C-series, can be identified by the bottom pan shape and the bolt count. Engines from 1982-up are 50-ounce offset balanced with a larger weight welded to the flexplate. Both pull a cable that operates the throttle valve.
The one lone solenoid C is for converter lockup in overdrive. These numbers are factory specifications. When the throttle is opened, cable movement and tension increase, modulating line pressure accordingly via the throttle valve, which is what you want when power is applied. The downside to the aluminum pump is somewhat reduced durability. When installing a new or modified driveshaft, harmonics balance can be an issue.