kwai : 4L80E

4L80E
Post by kwai on Nov 23, 2006, 11:25pm

I can get a 4L80E 2wd auto. I think this is dimensionally the same as a th400.

Is it possible to change out the rear of the tranny and add an adaptor for a married 205?

Re: 4L80E
Post by tacomainoh on Nov 23, 2006, 11:36pm

Probably, somehow.

Those also require the computer to go with them, or a pricey standalone.

Re: 4L80E
Post by barrman on Nov 24, 2006, 10:32pm

If not the actual computer, at least one of the Painless "kits" that do the same thing. Either way, it is a big added expense.

Could always go the divorced 205 route.

Re: 4L80E
Post by hewl35 on Nov 28, 2006, 6:22pm

I think Art Carr makes a manual valve body for the 4L80E which would eliminate the need for a computer. However the shifts will be harsh, such as barking the tires. May not be a big deal for a trail only or limited street travel truck. Art Carr is a racing transmission dealer like TCI, etc.

Re: 4L80E
Post by tacomainoh on Nov 28, 2006, 7:24pm

I"m looking at Art Carr's website right now. The valve body kit DOES NOT eliminate the computer.

Re: 4L80E
Post by kwai on Nov 28, 2006, 10:48pm

Not too worried about the computer. If I use the tranny it will be connected to the 5.7 vortec which it came with. Already have the computer and harness for it. Just need to decide how to hook up the transfer case, divorced or married.

Re: 4L80E
Post by kwai on Nov 28, 2006, 10:50pm

A stand-alone computer is $500-600. The tranny has overdrive which makes it more desirable than a th400 for on-road use. Anyway, I am just investigating the possibilities. Nothing is for certain.

Re: 4L80E
Post by tacomainoh on Nov 28, 2006, 11:57pm

Kwai, either they came w/32spl or they can be retrofit. I would think that the adapter issue is not that big a deal. I would think it's a th400 pattern, so stuff SHOULD bolt up.

maybe check AA's website. I'm too lazy.

Re: 4L80E
Post by bigwheelbob on Nov 29, 2006, 7:25am

you can use this trans if you use the round pattern t-case. I have bought the factory 4l80 adaptors off ebay. Similar to the 400, but I think the index is a little different size. I am not 100% sure, but I think i would try the adaptor on the trans before I worried about changing the shaft. It might be ok.

Re: 4L80E
Post by tacomainoh on Nov 29, 2006, 8:43am

Good point!

I forgot, sometimes the short shaft stuff is the right length for t-cases.

Re: 4L80E
Post by cjal on Nov 29, 2006, 10:12am

You sure it's am 80E not a 60E? I thought the 80 only came behind the 454's not the 350's.
they are comperable to the th350 and th400

Re: 4L80E
Post by kwai on Nov 29, 2006, 11:41am

It's and 80E. Made in Ypsilanti at the willowrun plant.