Any gear housing from a mechanical speedo 700r4 should fit. Depressing the brake pedal interrupts the 12-volt power and unlocks the converter center. There are a few other aspects that accompany a conversion to a 700R4, but these are the main ones that you might consider. In 1991~ the 700r4 transmission was replaced by the popular transmission 4L60. Here is the sender I have. The 700r4 was a big upgrade with an additional gear Overdrive , the 1st and 2nd gear became longer, and the transmission case itself became a bit longer. That would have been too easy!!! If, during a measured mile speed calibration, the speedometer pointer is pointing at 30mph, no signal is getting to the speedometer.
If the speedometer cable is mechanical than you have a 700R4. Just let us know your rear end ratio and tire height from pavement to top of rubber, and we will do the math for you. If you have a mechanical speedometer — Check if you can see any problems with the speedometer wire, replace it if you can look at any signs of worn or other damages. I've started wiring up my gauges and ran into a snag. If you feel that th e engine seems like it is turning faster than it should be while going down the highway, than you could have an issue with torque converter refusing to lock up Common causes: It is caused by a switch under the brake pedal.
This leads to low line pressure that smokes the clutches. To see the parts you can go to Amazon either by clicking or checking the ad down below. It is not necessary to hold the pushbutton while calibrating the speedometer during the marked mile method. The far left connectors are normally closed completing the circuit, until the brake pedal is depressed, which interrupts the circuit and unlocks the converter. I don't necessarily see any problem, as even in third, you'd be going at a good clip when the vacuum switch allowed a lockup. But the difficulty comes in setting up the linkage adjustments to accomplish this task. Since it's such an important part of your vehicle, you don't want to leave anything to chance.
This does, however, require the use of a special brake light switch. As mentioned already, make sure the sleeve is marked for the correct number of teeth for your driven gear. A single wire solenoid can be used just as easily. Thanks again for the great information. Remember to check the transmission closely before you are making your purchase.
Expect to spend half a day or more on this process. This is certainly the easiest way to identify it. If you have a clear view of the transmission count the bolts. Check the wirings diagram and make sure the switch is working correctly and make sure you get voltage to the switch. Hot temperature readings can be caused by air pockets in the system. Mike Christy First off, thanks for all the great information.
It will also allow adjustment of shift firmness all within the control of either a simple hand-held device, or in some cases, sophisticated software that can be tuned via a laptop. If you are having troubles calibrating, make sure to press the pushbutton extra hard to insure it is making contact. Take it out, attach a ground wire to the mounting plate and move the arm manually to make sure the gauge responds as it should. If you are installing your transmission that was purchased from Monster Transmission, our sales and support staff is here. The instructions for my autometer electric speedo sender Model 5291 says to place the sender on the tranny take off. This will also cause an erratic reading.
By using a stopwatch and your odometer, you can test drive your car and confirm that the new speedometer is accurate. Connecting more than one device to the sender will cause the gauge to read high. It was made exclusively for four wheel drive vehicles. Speedometers with pointer fluctuations over 10mph are usually caused by ignition interference. Specify tire size and rear axle ratio. I hope you enjoyed the information, see you in the next article! Sometimes the pushbutton is not connected to a ground.
If the speedometer is steady without the engine running, then the problem probably will be solved by shielding the speedometer. If the fluid level is low, try to fill it up to see if it solves the problem. With my system you do not have separate switch for convertor control like some kits provide. These are often pretty expensive and you need some skills to replace these. If you can see it correctly, you will find an identification number of 7-8 letters and numbers.
If you have done everything above and the transmission is still slipping, you might have to replace it. You can see more details here:. I hope you like the information and if you have any other questions, leave a question in the comment field at the bottom of the article, and I will answer your questions as soon as possible. Have you noticed the transmission puking fluid when you park it? If +12V to Pin A still blows a fuse, I'm told the pressure switch might have an internal short. Nick the loose and wobbly thing is not going to work. This ensures that the driven gear properly engages the drive gear. Imagine my surprise when I looked into the casing and saw a blue plastic drive gear, Duh! It's a metal disc with thin square edged teeth on it.
You may have to tighten down some connections as well. Thanks a bunch to Michelle for letting me take over the basement all winter and putting up with the musk of burnt tranny fluid. I do not have a housing or anything so a kit really would be my best option unless I salvaged something from a junk yard and just get the driven gear, which is something that I am willing to do. I'm told that I should try just hooking +12V to Pin A and tape off Pin D. When it shifts from 1st to 2nd its got a really smooth shift and it puts a smile on your face. Needless to say, this is dangerous. Use a flathead screwdriver to pry an edge of the plate forward gently and pull lightly on the plate until all of the pressure clips release.