TH400 (3L80) Modulator, Washer Kit and Flywheel

Here some other parts that we carry for the the Turbo Hydromatic THM-400 (a/k/a 3L80) automatic transmission.

The thrust washer kit covers the years 1965 to 1998. The Modulator pictured below is the single-red-stripe adjustable modulator. This is the one that is usually shipped when one is ordered unless you specify another when ordering. All modulators are good for 1965 to 1998 and here are the other options:

Black and Red Stripe
Dual Red Stripe
Mechanical Modulator Controlled by Cable
also available: Vacuum Regulator Pump

We have several flywheels available too. The one pictured is for 1986 Blazer with the 6.2L Diesel; the flywheel is 14.13" wide with 139 teeth.

Borg Warner BW-4405 Transfer Case Clutch Housing Assembly

Unlike other chain driven transfer cases, the BW4405 transfer case has a clutch housing. The clutch housing is part of the system that engages and disengages the transfer case.

When ordering the clutch housing assembly you will receive the housing, clutches, steels and other parts necessary for its proper use and replacement as pictured below.

A404, A413, A470, A670 Governor

The A404 (30TH), A413, A470 and the A670 (all three a/k/a 31TH) share the same governor. The only thing to note when ordering the governor is the year. One is from 1978 to 1980 and the other one is from 1981 and up (pictured below).

At time of this posting the 78-80 was available reman or new and the other one only reman. Also available are the:

Anti-Stick Spring and Bracket (installs outside the governor)
Anti-Stick Spring (installs inside the governor)
Governor Support and Support Retainer
Oil Baffel - inside Differential or Extension Housing

A500 (40RH, 42RE....) Reverse Drum and Center Support

The A-500, 40RH, 42RH, 42RE and 44RE are all in the same transmission family line. The RH indicates non-electric and the RE indicates the unit is controlled electronically instead of hydraulically.

The reverse drum comes in two different design; one comes with no washer under the support snap ring (88-04) and the other with a washer under the support snap ring (90-04). At first glance you can not even tell the difference and it is necessary to properly identify the one you need when ordering.

Over drive piston housing (center support) originally came with or without governor feed holes. The new ones retrofits all past ones and are compatible with or without the governor feed holes.

ZF-6HP26, 6HP26A, 6HP26X Transmission - Information

The ZF 6HP26 and 6HP28 series are a rear wheel drive 6 speed automatic transmission.

Depending on model input torque can range from 326 to 444 ft lbs.

Gear Ratio: 1st - 4.17 / 2nd - 2.34 / 3rd - 1.52 / 4th - 1.14 / 5th - 0.87 / 6th - 0.69 / Rev - 3.40

Oil Capacity: Approximately 10 liters including cooling system.

The ZF6HP26 is used by Audi, BMW, Jaguar, Ford and Lincoln. Ford has designated it a the 6R60, Audi as the 09E. The ZF6HP26A 61 and the ZF6HP28AF are an all wheel drive unit and are also used in the Audi and BMW. The ZF6HP26X and the ZF6HP28X is the 4x4 version of the unit; in addition to the the car manufactures listed above the Ranger Rover uses this version.

Most parts are shared among the different designs but there will be some differences. Kits could come with extra parts to accommodate more than one design. Below you will find pictures for the overhaul kit, friction module, steel module (all together make it a master kit), and filter. The filter is a pan and filter assembly.

Here is a short list of vehicle models equipped with this transmission:
Audi: A4, A6, A8, TT, S6, S8, Cabriolet, Quattro
BMW: 545i, 5 Series, 6 Series, 645ci, 645Li, 745i, 745Li, 750i, 750Li, X5
Jaguar: S Type, XJ Vanden Plas, XJ8, XJ8L, XJR, Super 8, XK8, XKR
Land Rover: LR3, Ranger Rover Sport HE and Sport
Lincoln: Navigator

A541E Solenoid

The solenoids for the A541E are pretty straight forward. There are two shift solenoid which are wired together and the lock-up solenoid.

The shift solenoid are the 1 and 2 shift or it can be referred to as the A and B shifts. A bracket is included with the shift solenoid as pictured below. The lock-up solenoid (TCC) is also pictured below and it is the one by itself. The A541E automatic transmission was introduced in 1994 and the solenoids are the same for all years.

A solenoid kit is available too. It contains the shift and lock-up solenoid plus the bracket.

NP246 Vehicle Speed Sensor

The vehicle speed sensor, the VSS, is used in the New Process Gear Transfer Case NP-246. Depending on year and vehicle model it can use two or three. There are two types of the VSS. A push in model or a screw in model like the one pictured below.

To be on the safe side, it is good practice to replace these sensors when rebuilding the transfer case. The Np246 is primarily used in GM vehicles like the Suburban, Avalanche, Escalade, Tahoe and Yukon.

C-3, A4LD, 5R55E Sun Gear

The C3, A4LD , 4R44E, 5R44E, 4R55E and the 5R55E share the Forward and Overdrive Sun Gear. The Overdrive Sun Gear is also used by the 5R55N, 5R55S and the 5R55W from 1991 to 2001 (24 tooth) used with the 25 tooth planet.

The forward sun gear could be either a no bushing type as pictured below or a two-bushing type. Here are the year break down by transmission model:

C3, A4LD
1974-1995; 2 Bushing Type
1985-1995; No Bushing Type

4R44E / 55RE; 5R44E / 55RE
1995-Up; could be either or.

Sun Shell and Gear Kits available.

ZF5HP19, ZF5HP19FL, ZF5HP19FLA Speed Sensor

The ZF 5HP19, 5HP19FL and the 5HP19FLA use and share some of the same speed sensors. These units are used by Volkswagen, Audi, BMW and Porsche just to name a few.

The part numbers for the speed sensor listed in this post are primarily for North American applications. Some part numbers are available everywhere and some are not. As you will see in the pictures below the speed sensor are not necessarily part numbers for vehicles manufactured for the North American Market.

Speed sensors have the part number right on them as illustrated below. This makes identifying the part you need easy and simple. When ordering a sensor, or any part, just locate the 10 digit part number. Some speed sensors might contain a wire with at end attached to the main body (see pic below).

Possible part numbers for speed sensors:
0501 314 432
0501 208 543
0501 210 474 (New Number 0501 322 866)
0501 311 086

E4OD, 4R100 Extension Housing

The E4OD and the 4R100 are fitted with different extension housing depending on year and application.

Here are the options for the 2 wheel drive (2Wd) extension housing:
1989 - 1991.
1992 - 1997 with casting numbers F2 through F6.
1992 - Up E4OD with 3 1/8" rear seal and no sensor hole.
1992 - Up E4OD with 3 1/8" rear seal with senor hole.
1992 - Up E4OD with 2 1/2" rear seal with no sensor hole.
1998 - Up 4R100 with 1.890 bushing.

4Wd extension housing:
1989 - 1991
1992 - Up E4OD
1998-Up 4R100


Here is the break down on the pump for the AXOD, AXOD-E and the AX4S. When ordering the pump for these units the year is very important and if you are not sure of the year the casting number can also identify the pump needed.

The AXOD in 1987 has a casting number of RFE7 and comes with the separator plate.

The AXOD in 1988 has a casting number of RFE8 and comes with the separator plate.

The AXOD from 1989 to 1990 has a casting number of RFE9 and comes with the separator plate.

The AXODE and the AX4S pump is the same from 1991 to 2003 and comes with the casting number RFF1 and does not come with the separator plate. This is the 5 solenoid version pump.

Other pump parts available are the pump cover, Converter Reactor, Pump Rotor, Vanes, Slide, Slide Pivot Pin and Vane Rings.

700-R4, 4L60E Valve Body Clips and Check Balls

The valve body check balls and clips pictured below are for the 700R4 (4L60), 4L60E, 4L65E and the 4L70E for all years.

It is suggested to purchase the 10 pack of each, the check balls can be purchased individually. The exact amount needed will depend on your particular need. The check balls could be steel or brass