Can anyone help identify transmission?

[71_Duster]

I believe it’s a 904?
I have the serial number by shift selector if it helps but can’t identify numbers

 

[66340SEDAN]

Looks like a 904

 

[townsend]

Date code is January 20, 1984.
4329436:
999 transmission found in Gran Fury, Fifth Avenue and Diplomat with 318 engine, 2.6 axle ratio and it's a lock-up.

 

[71_Duster]

Date code is January 20, 1984.
4329436:
999 transmission found in Gran Fury, Fifth Avenue and Diplomat with 318 engine, 2.6 axle ratio and it's a lock-up.

Wow, that’s more than I could ask. Thank you. I’m guessing it’s just the same as a 904 except it has a lock up?

 

[townsend]

904 has 4 clutch discs : 999 has 5 clutch discs

 

[abdywgn]

does the 999 have the 2.74 first gear?

 

[townsend]

904 - 2:45 1:45 1:1
999 - 2:74 1:54 1:1

 

[Cuprum-74]

Most definitely an A999. Mine is from a 1989 Dodge Diplomat that I found chucked into the back of an old panel van in a salvage yard.
These are damned good transmissions. Stronger than the A904, then you got the 2.74/1.54 1st/2nd gears and then lock-up. Which reduces your RPM's by 150-200 when cruising on the highway/freeway.
I rebuilt mine with a premium rebuild kit using kevlar bands, Kolene steels and Red Eagle clutches.

I went silly with mine and took out the lock-up function & installed a Turbo-Action Cheetah stage 2 Non-LU valvebody. I kinda regret it but oh well, not a big thing with me as it's now much stronger than it was when it left the factory..

 

[Cuprum-74]

For example the full code on mine is: PK4505170 9937 9574. (9937 = about October 11, 1988, for the 89' model year)
I believe it translated to: #4505170. 1989 Diplomat' A999 Lock-up, some 3.9 ltr vans/trucks.

 

[71_Duster]

When looking up A999 transmission i get a majority search of jeep transmission. Obviously this is for a rear wheel drive and not 4wd. When looking for rebuild, searches come from torqueflight 6, A908/A998/A999 rebuild kit. Considering the A999 is a 5 disc as opposed to its predecessors, can you give me a suggestion as for what rebuild kit or if there’s an upgrade valve body for the A999? Would like to keep the lock up. I’m assuming it’s used as an external lock up with toggle switch on the dash?

 

[toolmanmike]

Wish I kept my lock up. It would be a great addition to my Swinger to pick up a couple mpg. And yes, you can get a performance converter for them. Precision of New Hampton builds them.

 

[Cuprum-74]

When looking up A999 transmission i get a majority search of jeep transmission. Obviously this is for a rear wheel drive and not 4wd. When looking for rebuild, searches come from torqueflight 6, A908/A998/A999 rebuild kit. Considering the A999 is a 5 disc as opposed to its predecessors, can you give me a suggestion as for what rebuild kit or if there’s an upgrade valve body for the A999? Would like to keep the lock up. I’m assuming it’s used as an external lock up with toggle switch on the dash?

I've used these guys in the past:
A904 Rebuild Kit A998 A999 Automatic Transmission Master Overhaul Banner Box Set Torqueflite 6
I'm sure there are a little better deals out there if you're willing to do more searching.