TH-180 Adjustable Modulator

As in most adjustable modulators this one replaces most of them made for a specific unit and you adjust it to your liking.

What exactly does this mean?

The modulator is adjusted for a harsher /
firmer shift or a softer shift. The one shown below and as an example is our part number 24160G (used in the Geo Trackers and the Suzuki Sidekick) and we will explain how it should be adjusted.

Look for the part of the modulator that is not threaded. You will see a small slot where you can turn it with a small flat screw driver.

Turn right for a higher shift or turn left for a lower shift.

This will not change the shift points.  This will only change the shift quality.  That is it will only make the shift harsher (firmer) or softer (less firm).

If this does not fix the issue you are trying to resolve like shifting points you will need to inspect the throttle valve cable as the culprit.

09A Aftermarket or Orgingal Solenoids?

I was on the phone with a customer today asking about the difference between the aftermarket and the original solenoids for the 09A/JF505E solenoids. The thing is this was not the first time this week this question came across my desk.

For the past few months this question has become more popular as the cheaper aftermarket solenoids come to market. Talking to a few of our clients that work on this unit they explain they tried the aftermarket solenoid with little success.

The main complaint is they fail quickly resulting in the vehicle coming back for warranty. This means the solenoids need to be replaced with original ones, which also means having to buy more oil (very expensive oil).

The difference in price between the AM and Original is not enough to justify taking the risk from what we keep hearing. This should be taking into consideration when replacing all the solenoids or just one.

ATC700 Transfer Case

The newest edition to the transfer case line for the BMW X5 is the ATC700. Also used in the X6, this transfer case is not very different from its predecessor the ATC500.

They both have a transfer case actuator or shift motor and sprocket assemblies with frictions and steels. Much like the ATC-500 and the NV125 it replaced the chain has a tendency of stretching. Once stretched you will hear a popping noise coming from under the vehicle when you hit the gas.

At this point you want to replace the chain asap. If left unfixed the drive and driven sprockets can go bad increasing the cost of the repair significantly.

TF80SC Valve Body

The TF-80SC is a 6 Speed automatic transmission for front wheel drive application manufactured by Aisin Warner. This transmission is used by different vehicles companies including Ford, Volvo, Saab, General Motors, Opel to name a few.

This unit is also known as the AF40-6, AM6, AW6A-EL, TF81-SC and AF21 depending on which vehicle manufacture is using it. For example the AF21 designation is used by Ford.

This unit is light and it is controlled electronically. Its also used in an all wheel drive version like the Volvo XC90. The TF80SC valve body is in constant use as it engages in and out its 6 speeds. When the vehicle is idling, the tcm automatically shifts the unit into neutral to reduce heat and conserve fuel. All this shifting eventually wears down the valve body and it's solenoids.

The valve body shown below is for the Volvo, Saab, Opel and Vauxhall. Please click here to see the listing on our web site.

NP271 Input Shaft

Happy Monday to all.

As this years brutal winter keeps pounding the north east and mid west drive-trains will be heavily taxed.  We have seen an increase interest in the New Process 271 and 273 T. Cases. 

In this posting we will discuss the input shafts for the NP-271 and the NP-273 transfer cases.

Their are four different input shafts; 3 different versions for Ford and one for Dodge.

Here is a breakdown:

Ford 24 Spline Part Number 421670 (26605)
Ford 31 Spline Part Number 421670A (24257)
Ford 34 Spline Part Number 421670B (44631)
Dodge 29 Spline Part Number 421670D (5086311AA)

Some of the Fords this unit is found in are the Excursion and F-Series with the 5.4L and 7.3L Diesel.  Dodge Ram 5.2L, 5.9L Diesel and the 8.0L 10 Cylinder.

Always count the spline to confirm the correct part number and avoid a delay in receiving your parts.  As this years brutal winter keeps pounding the north east and mid west drive trains will be heavily taxed.  We have seen an increase interest in the New Process 271 and 273 T. Cases.

Please click here to see the different shafts.