How do I determine which tranny I have ( 4r100 or 4r70w)?

any way I can tell by looking under truck?

I have 4x2 4.6l 2001 AT.

want to change filter/at fluid, but need to know how many quarts.

thanks!

 

U=AOD-E/4R70W
E=E40D/4R100

I believe that the California emissions standards call for the 4R100, regardless of engine. If you could confirm this, I'm curious to know if that's true.

 

All 4.6L engines get the 4R70W. The 4R100 has never been mated to the 4.6L.

Another way to tell is look at the blue tag in the driver's door opening. I think the transmission calumn is labeld "T" or "TRAN" and will have a "U" for 4R70W or an "E" for 4R100.

Mark

 

Thanks for the help, guys!

I have a " U" under " TR", so I guess that's a 4R70W tranny.

I ordered my truck special from the plant with the " cruising" tranny...rear end.

just wanted to change tranny fluid and wondered how much I needed.

 

Do you know the procedure for draining the torque converter???

If you just drop the pan, you only remove about 5 Qts. If you drain the torque coverter as well, you should be able to replace just under 13 qts. The rest is in the lines and the cooler.

 

Thanks for the Info. Torque converter has a drain plug, right??? Where do you fill, the Tranny dip stick tube or is there a fill plug?

To completely fill I need 13 qts?
Thanks.

 

I'd get 13 qts of Mercon V and a filter. And yes, there is a drain plug for the torque converter. The gasket is for the pan is also reusable.

Changing the transmision fluid is not very difficult. I changed my this past Tuesday and added a transmission drain plug. The 4R70W doesn't have a drain plug so it can be very messy changing the fluid. If you install a drain plug, you are much more likely to change the fluid regularly. I really do suggest that you buy the plug and install it when you change the fluid. It requires a 1/2" drill bit, so be sure that you have a drill that can handle that size.

The torque converter drain plug is inside the bell housing between the engine and the transmission. You'll see a round, black plug that you simply pull out and behind that is the drain bolt.

You'll need to rotate the crankshaft to bring the drain bolt to the bottom of the bell housing. Lay underneath the truck and turn the crankshaft with a socket and a breaker bar (or long socket wrench) until you see the bolt. The torque converter takes about 20 minutes to drain.

When you change the filter, be certain that the pink gasket on the neck of the filter comes out of the transmission too. You'll see it when you remove the filter.

The transmission pan bolts are torqued to 10 ft/ lbs, which is just tight enough that the bolts don't rattle loose. If you go too tight, the gasket will leak.

When you refill, add 5 qts through the transmission dip stick tube and run the engine for about a minute. After that, add another 6 qrts and then begin emptying the old fluid into the empty containers to determine exactly how many qrts it will take to refill the transmission and torque converter to its previous level. If you over fill, there is a risk that some of the gaskets could leak.

 

Thanks for the instructions. I will attempt " surgery" on my truck later on this week.

AJ, appreciate your help!

 

Vroom!!!

Thanks, Peter!!!