Transmission ID Info

[mopowers]

Do any of you know of a 'PK' number listing for later model A998/A999 transmissions?

I'm looking for something like this, but for transmissions after 1986: mymopar.com/downloads/transguide.pdf

 

[Dana67Dart]

What number are you looking for?
Tom Hand's book has some up thru the 90s and 2000-2002

 

[fshd4it]

PK 4431554, 1987-88 A999

 

[mopowers]

What number are you looking for?
Tom Hand's book has some up thru the 90s and 2000-2002

PK4531005. I'll have to look in that book.

Pretty sure it's a late 80's 4x4 unit. I'm curious if it'd be a lockup or non-lockup transmission. Pretty sure I could use some parts out of it regardless.

 

[mopowers]

Also, what would a 0490 date code translate to?

 

[townsend]

0490 date code is April 17, 1990.

 

[mopowers]

0490 date code is April 17, 1990.

Thanks. Stupid me, that makes a ton of sense. When did they change the format of the transmission date codes?

 

[Lefty71]

 

[fshd4it]

Tom Hand's book lists 4531005 as '87-'90 jeep YJ 2wd

 

[Lefty71]

Wonder if it has the low gear set?? Doesnt A&A modify those and sell for a super tidy profit???

 

[fshd4it]

Wonder if it has the low gear set?? Doesnt A&A modify those and sell for a super tidy profit???

I know an A999 from an '87 D150 does...

 

[mopowers]

View attachment 1716494314

I'm assuming the "LU' means lockup? That's weird since it appears to be a non-lock-up version.

 

[lemondana]

That looks like lockup to me.

 

[fshd4it]

That's a standard non-L/U input. As I understand it, those are rare as hen's teeth. There's a good long thread on here about it, packed with info, rmchrgr posted it back in March of 2015. I'd link to it, but I've no idea how.

 

[mopowers]

That's a standard non-L/U input. As I understand it, those are rare as hen's teeth. There's a good long thread on here about it, packed with info, rmchrgr posted it back in March of 2015. I'd link to it, but I've no idea how.

Thanks. I saw that thread. This particular transmission is a 4x4 unit though, so I'd maybe be able to use some of the internals depending on condition - pump, higher capacity clutch drums (?), etc. May still be worth snagging for parts though.

 

[Lefty71]

Need a count on the input shaft splines. 23 is lockup....24 is non lockup.

 

[fshd4it]

In my book they're all worth snagging for parts. Strange it's a 4x4, but Tom lists it as a 2wd. Wonder if someone's built a 3 bean salad there?

 

[fshd4it]

Snagged this from here ages ago.

 

[townsend]

10000 date code was reached on December 13, 1988.
Then date code for December 14, 1988 was 10001 which is stamped 0001 on transmission.

 

[mopowers]

10000 date code was reached on December 13, 1988.
Then date code for December 14, 1988 was 10001 which is stamped 0001 on transmission.

Oh, got it. Thank you. So, the 10,000 calendar simply rolled over once it topped out. Good to know. I thought 0490 was April 1990 for the obvious reason. Glad I asked.

 

[townsend]

From the 1990 factory Jeep parts catalog.
4531005 shows out of a 1990 Jeep Wrangler with Four Wheel Drive. Body style YJ.

 

[Dana67Dart]

 

[fshd4it]

View attachment 1716494348

Yep, I got that one from an '87 or '88 D150. It has the electric lockup control, with the defeat switch on the dash.