I have a few simple questions for the Transmission guru:

1- What is the difference in the 6 speed ZF 6HP26 and the 6 speed 6R75?

2- Are either of the above mentioned models considered to be a TorqShift transmission?

3- On a 2008 Expedition equipped with the 6R75 transmission, what is the recommended service interval for changing fluid under normal driving conditions (we do NOT pull a trailer with this vehicle)

Thanks!

 

3. My dealer told me I didn't need it at 30,000 miles, even in towing service. Probably 60K for towing and twice that for normal driving. I pull my camper a dozen weekends in the summer.

-- Chuck

 

I believe that the ZF is used on the Navigator. It does not have a low 4x4 range. The 6R75 is used on the Expy. It has a high and low 4x4 ranges.

I believe that the 6R75 does not have a fluid change interval, nor does it have a fluid level dip stick. It also uses a very special auto trans fluid available only from Ford. Best check you owner's manual. It should all be told in it.

 

I have a 05 with the ZF and it has low 4x4.

 

Looks like I need to reread my owner's and shop manuals!!!

 

I am not sure which exact tranny I have but I just found out at the 30,000 mile service that there is no dipstick! What is that all about? I had the fluid and filter changed for well over $200 but this is on my maintenance schedule. (Chuck - you may want to double check your dealer) Also, there is some special tool needed to flush the trans.
(2007 expedition xlt)

 

I read in my owners manual that the 07 & 08 trannys have no dipstick and you have to take it to the dealer to check the fluid level. Isn't that fantastic, another way to get you to pay. I want to install a heavy duty cooler, but I know it will require more fluid so either I get them to do it or I dont add the cooler? nice.

 

ford claims the transmission fluid doesnt need to be changed till 100K and that is why there is not dipstick. This is a joke, if this were really the case, they ought to remove the dipstick for the F250, F350 and on up. Ford is just trying keep there service departments alive and seem to be cutting corners to save a few bucks here and there.

 

FYI This is from my maintenance manual for 30,000 miles. I will admit, I do not know if my tranny is called a Torqshift transmission? but I assume I needed to change the oil at the dealer as I just did. ❑ Change engine oil and replace oil filter.❑ Inspect tires for wear and rotate.❑ Inspect brake pads/shoes/rotors/drums, brakelines & hoses, and parking brake system.❑ Inspect wheel ends for endplay and noise.❑ Inspect engine cooling system and hoses.❑ Inspect exhaust system and heat shields.❑ Inspect steering linkage, ball joints, suspensionand, if equipped, halfshafts, driveshaft andU-joints.❑ Replace engine air filter.❑ Replace fuel filter (see page 47).❑ Replace cabin air filter, if equipped.❑ Change automatic transmission fluid on vehiclesequipped with the Torqshift transmission. Replacethe remote filter element on the vehiclesequipped with the . Inspectautomatic transmission/transaxle fluid levelon all other vehicles, if equipped with dipstick.Consult your dealer for your particularrequirements.❑ Replace climate-controlled seat filters if equipped(Navigator and Expedition).❑ Lubricate ball joints and steering linkage ifequipped with zerk fittings.❑ Inspect and lubricate 4X4 front axle shaft U-joints(F250/350/450/550).❑ Multi-point inspection (recommended)