FOURTH GEAR INC.

            technical Information

 

              WE SHIP WORLDWIDE 

 

 

Fluid Capacity

 

The total fluid capacity is approximately 11.5 quarts depending on cooler sizes. The filler tube and dipstick provided will give you an accurate fluid level reading. Put no less than 4 quarts of fluid in the transmission BEFORE starting the engine. Upon start-up immediately add the rest of the fluid (with one already in the converter add 6 more quarts). A FINAL fluid check should take place only after the transmission has been cycled through all four speeds several times and is at operating temperature. 

 

Torque Converter

No two installations will be identical due to the wide array of applications of the 700 R4. 

The information contained in the section was designed to answer all 

of the commonly asked questions we receive.

 

IMPORTANT INFORMATION PLEASE READ THOROUGHLY!

*Torque Converter:  The most unforgiving of errors can occur right here. The Torque Converter will self fill with fluid when the engine is started and the transmission is filled. However, put one quart of oil into the Torque Converter to avoid a dry start-up. The Torque Converter must engage two splines AND a set of drive lugs on your pump rotor to be fully seated. Support the weight of the Torque Converter while placing it over the splines and guiding the neck into the front seal. Turn the Converter back and forth while gently pushing it in. After the transmission is bolted to the engine, the Torque Converter mounting lugs must remain a minimum of 3/16" from the flywheel *(Figure 1 - Below)

If there is no gap in between the flywheel and the Torque Converter DO NOT tighten any bell housing bolts. This indicates the Torque Converter IS NOT fully installed in the transmission or there may be a fly wheel issue (although uncommon). 

THE TORQUE CONVERTER MUST BE MOVED FORWARD AND COMPLETELY SEATED IN THE CRANK SHAFT PILOT BEFORE THE BOLTS ARE INSTALLED.

 

                          Figure 1

The distance between the straight edge and the 

converter mounting pads is approximately 1".

t.v. (throttle Valve) cable

Throttle Valve Mechanism

The purpose of the TH700-R4 Throttle Valve (T.V.) and its mechanical linkage is to control both the shift feel and shift timing as a function of vehicle speed and load conditions. As the accelerator pedal is depressed and the throttle opens, the T.V. mechanical relays the motion to the throttle plunger in the valve body by way of the T.V. cable. 

In factory installations of the TH700-R4 the geometric relationship between the T.V. cable and throttle shaft bell crank produces the required T.V. cable extension (pull) to throttle opening for the transmission to function properly. 

In custom installation the correct T.V. cable mounting geometry must be accurately determined if the transmission is to function properly. It can not be overstated that for the TH700-R4, proper T.V. cable installation and adjustment are vital to proper transmission function and life.

 

Transmission Cooling

We feel that it is very important that every vehicle in addition to the radiator heat exchange should have an oil cooler. Heat is the major cause of transmission failure. An oil cooler is an inexpensive safeguard against overheating and failure.

 

in-series: This is the recommended cooler connection. It utilizes the existing cooling system and returns the coolest oil directly to the transmission.

replacement: This method should be used if the existing cooling system is damaged. 

 

Lock-Up Torque Converter Control

Your 700 R4 Transmission is already wired internally to provide 

4th gear only lock-up apply. 

(Most after market lock-up wiring kits provide no more than this function).

You will need to supply a 12 volt key-on power supply to the single wire 

coming from the transmission case electrical connector.

We strongly recommend an on-off switch located inside the vehicle to override the system.

You may run across kits in the after market that include vacuum and/or cruise-control style brake light switches. These devices are offered to simulate computer operation but their performance varies according to your particular engine vacuum, rear end gear ratio, etc. At the very least we strongly recommend an on/off switch in the system to give the option to have 4th speed driving capability, without lock-up for stop and go and around town driving.

 

Transmission Dimension 

Comparison Chart

 

General Motors

Make

A

B

C

D

Powerglide

(2 Lengths)

19"

16  5/16"

20  9/16"

25  23/64"

 27  9/16"

TH350

(3 Lengths)

19  1/8"

21  5/8"

20  3/8"

27  11/16"

30  11/16"

37  7/8"

TH400

(3 Lengths)

20"

24  5/16"

26  15/16"

28  3/8"

33  27/32"

37  7/8"

200 R4

19  1/8"

27  11/16"

27"

27  11/16"

700 R4

20"

23  3/8"

22  1/2"

30  3/4"

700 R4

(Corvette)

20"

23  3/8"

22  1/2"

29  7/8"

 

 

Copyright © 2002 Fourth Gear Inc. All rights reserved. Revised: 08/19/2013

Questions or Comments about this Website? Want your own Website? We Have Great Hosting & Prices!

 Email the Webmaster