Decode a 4l80e [Archive] - Pro-Touring.com

critter

03-18-2009, 06:33 PM

Is there a site or can someone tell me how to decode a 4l80e's tag? I know what I have is an earlier model because it has the rib up the top of the bell housing and does not have the 12 o'clock hole.

A second question, are there any weak spots to fix before install. This is going behind a Pontiac 462ci motor making a bit over 400 hp and 500 ft. lb. of torque.

OK, third question, best converter for the money out there for said transmission?

MJ_Bone

03-19-2009, 08:35 AM

I'm pretty sure the first number on the tag indicates when it was manufactured. Cooler fittings together up front indicates early style. The newer style(97+?) has cooler fittings separated.

critter

03-19-2009, 10:13 AM

Thanks. I forgot to bring the numbers with me to work so I'll have to look when I get back home. I'm wanting to say it was a 3. I do know it's an early transmission based on the cooler fittings and other items I mentioned.

critter

03-19-2009, 03:45 PM

I'm beginning to think this is a Goodwrench service replacement transmission. The numbers on the tag are:

13TRP
97-346 193123

I see a cast number of:

24204250 and 7

Anyone out there have an idea what I'm up against here?

Steve Chryssos

03-20-2009, 04:20 AM

I'll post up numbers off a 4l80 trans here for comparison.

critter

03-20-2009, 04:33 AM

I'd sure appreciate it. Thank you.

Steve Chryssos

03-21-2009, 05:09 AM

Sorry I ran out of time yesterday. And I'm still trying to get caught up on orders today. I'll try again later or Monday. I won't forget.

critter

03-21-2009, 04:05 PM

No rush from me. I'm grateful for the help.

MJ_Bone

03-22-2009, 02:10 PM

I can tell it's a 97 transmission. And 24204250 is the part number for the early style GM case (Google).

FWIW, I'm pretty sure that Goodwrench puts their own tag on them when they rebuild/remanufacture them.

critter

03-22-2009, 03:08 PM

Thanks. I should have googled that part number.

So, good, bad, OK? I'm not a monster motor. It's a Pontiac 462ci with about 425hp and 500 ft. lbs.

critter

03-23-2009, 01:45 PM

And after getting some time to research it via the internet today I am convinced it is the earlier case design because of the location of the cooling line ports. Thanks for steering me in the right direction MJ.