Thinking about this trans

[randy merritt]

I can get this 4l80e for $125. I am thinking about getting it just to have for a core in case I ever do the conversion. My understanding is that the arrangement of the cooler lines indicates it is and earlier version of the trans. What do you guys think? Buy or No Buy?

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[Quickstop [UK]]

Re: Thinking about this trans

How much are cores otherwise? For $125? Yeah, probably. I have the same placement of cooler lines.

I got your PM btw - am back at school so will reply over the weekend!

 

[sy605]

Re: Thinking about this trans

Thats the one you need. Looks like a 2wd but that can be changed. Good price though.

 

[randy merritt]

Re: Thinking about this trans

Does anyone have any idea what year model the trans is? The hand drawn marks on the case say "4-03", but the metal tag has me confused. It did come out of a 2wd 2500 Chevy truck. The junk yard guy thinks it is a 97 or 98, but I don't know enough about them to verify this.

Thanks for the help.

 

[sy605]

Re: Thinking about this trans

Looks like a pre 95. The 96+ have a shift indicator control box on the drivers side. (if I'm not mistaken) At least this is what I've found from junkyard visit.

 

[DaveP]

Re: Thinking about this trans

I could be wrong, but I'm going with 1993 Model Year. I'm not 100% sure how to crack the date, but earlier TH400's and 4L60's use the day of the year, and the year is the MODEL year. So 306th day is late October, which would actually be Late October 1992, for an Early-build 1993 Model vehicle.

HTH, Randy.

 

[randy merritt]

Re: Thinking about this trans

I could be wrong, but I'm going with 1993 Model Year. I'm not 100% sure how to crack the date, but earlier TH400's and 4L60's use the day of the year, and the year is the MODEL year. So 306th day is late October, which would actually be Late October 1992, for an Early-build 1993 Model vehicle.

HTH, Randy.

Thanks, Dave. That is what I suspected. I think I will pass on this and try to find a 2001+ model.

 

[MRKING]

Re: Thinking about this trans

I also agree that it is a 93 . The minimum you want to grab is a 94 and the newer the better of course .

 

[Captain Morgan]

Re: Thinking about this trans

Id grab it for parts, but thats about it.

I picked up a 97 4x4 4L80E for $120 off of CL last spring, so the deals are out there

 

[Beavis]

Re: Thinking about this trans

I think mine is a '92 and it holds fine. For that price, grab it no matter what year it is. If it a '03 reman like the sticker says, it might have all the updates.

 

[IGottaSy]

Re: Thinking about this trans

Thread hi-jack... Has anybody attempted to control these transmissions(electronic) via the VSS signal and/or the RPM signal using readily available parts as opposed to highly priced aftermarket controllers? I'd imagine the VSS signal could be used for normal driving while using the RPM signal for performance. VSS would control 1-2 at 20mph then 2-3 at 35 with 3-4 at 45 and then overdrive would kick in after 50mph for example. RPM signal would be set by the user to their liking. For instance, 1-2 at 3K rpm then 2-3 at 5krpm and then 3-4 again at 4500-4800 or so.

 

[IGottaSy]

Re: Thinking about this trans

Keep researching, grasshopper. There's a lot more to it than VSS. There's two shift solenoids, on or off for each one gives 4 possible combinations. Hence the 4 gears. Then there the TCC control, and lastly, the Pressure Control Solenoid. The equivalent of the TV Cable. PCS is very tricky. It has to be modulated during a shift to get the shift quality just right. A GM controller actually times the length of the shift and compares it to a table. If the shift was too long, the line pressure is increased for the next shift. If the shift was too short, line pressure is decreased/ They call this "Adapt". All three shifts are adapted in an 80e. Only the 1-2 is adapted in a 60e.

To answer your question several people here have used a stand-alone GM ECM just for the transmission control. There is some support for the trans in $59. I think the required ECM is the 7427. It's fairly straight forward to wire up.

Thanks for your response. Knowing how the transmission actually works helps greatly. Maybe some day I'll get one to tear it apart and maybe see if the TV cable can be made to work in it. Maybe the valve bodies in the 700r4 and the 60e's/80'e are similar enough or something.
About the "adapted" shifting, the 700r4 seems to shift 1-2 in a constant manner while the 2-3 and 3-4 are more dependent on TV cable operation. That makes it very similar to the 4L80e if I understand this right.

 

[IGottaSy]

Re: Thinking about this trans

Found this...
Hope it helps shed some light on this subject. Last post on this hijack.

http://mattw.dyndns.org/4L80E/

 

[MRKING]

Re: Thinking about this trans

Thanks for your response. Knowing how the transmission actually works helps greatly. Maybe some day I'll get one to tear it apart and maybe see if the TV cable can be made to work in it. Maybe the valve bodies in the 700r4 and the 60e's/80'e are similar enough or something.
About the "adapted" shifting, the 700r4 seems to shift 1-2 in a constant manner while the 2-3 and 3-4 are more dependent on TV cable operation. That makes it very similar to the 4L80e if I understand this right.

Not possible , there are no ways to hook a 700r4 tv cable to an 80e . You'd have better luck making the truck drive under water

 

[randy merritt]

Re: Thinking about this trans

OK, how about this:

"TCI™ 4l80e trans with TCI™ 2,300 streetfighter stall converter . All wiring and computer comes with package.plus all the instructions and tuning software. This is a complete kit ready to install.Everything is like new. Should handle around 700hp and is perfect for your street rod or race car."

It is a TCI built 4l80e on the local craigslist about 15 min away. I will look at it tom. and get the serial number to check the build with TCI (already called them). They told me a re-stall would be about $125, but I don't know anything about their torque converters, good or bad. I can get the setup for 2k. Trans is about 5 years old and has about 3000 miles on it and it is a four speed. He had it behind a 502 ci 68' Camaro and decided to go with a built T400. Any thoughts?

 

[randy merritt]

Re: Thinking about this trans

anyone?

 

[MRKING]

Re: Thinking about this trans

Are you swapping via trans output shaft or transfer case input shaft ?

If you have to pull the trans apart for a output shaft swap , it might mot save you much money in the end if you discover any things requiring a full refresh . No doubt it's a deal , I just wonder why the owner already swapped when they could have made any changes they want through the electronics .

If you piece it together youd have brand new parts with a limited warrantee at least . Get as much info from the guy and see how your gut feels about what he's saying . Worse case you offer him less if you still feel uneasy about it . Your truck is mint IMO I would hate to see you have issues with a used trans , a finicky tcu , or goobered up harness . HTH

 

[randy merritt]

Re: Thinking about this trans

I would swap the transfer case input shaft if the trans looks good. My thoughts are saving the core cost, saving the rebuild cost, saving the trans controller cost, and saving most of the TC cost. This assumes the trans and TC are built well from TCI. That is what I will be checking on. I figure I can save about $1000 vs. starting from scratch if everything checks out. Unless I can get the setup even cheaper.:tup:

EDIT: He sounds like a good ole' southern fella, and he told me he was computer illiterate and did not want to have to mess with a trans that required a laptop. He did use the trans briefly, but then swapped it out for a simpler T400.

 

[midnightbluS10]

Re: Thinking about this trans

I'd go for it, Randy.

 

[randy merritt]

Re: Thinking about this trans

Ok, some pics of trans. It is a 2wd, so I assume I would need to change the tail housing, along with the output shaft. It might be best to get the 27 spline output shaft, and just change that while I am in there, and leave the transfer case alone. I will call TCI monday and give them the build number to find out what has been done to trans. Tell me what you think of 2k for whole deal, and give me opinions on how much more the conversion is going to cost. Thanks.

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