Is this a TH400 or 4L80?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Accelo** · 10-29-2022, 02:28 PM

Unlikely you will find the long foot 71-85 GM TH400 to NP205 adapter. Advanced Adapters has a reproduction that sells for $270.

Yours works fine. The difference between the usage is in the cross-member.

The short foot, that you have, typically have an asking price of around $400. Unsure if they actually sell many for that price or not?

dieseldawg142 · 10-29-2022, 02:56 PM

yep, T400 with a 208 adapter.
i have a T400 with a 205 in my crew.

**chev-obsession** · 10-29-2022, 03:37 PM

Quote:

Originally Posted by Accelo

Unlikely you will find the long foot 71-85 GM TH400 to NP205 adapter. Advanced Adapters has a reproduction that sells for $270.

Yours works fine. The difference between the usage is in the cross-member.

The short foot, that you have, typically have an asking price of around $400. Unsure if they actually sell many for that price or not?

Yes I am finding the 400/205 adapters are far and few between. Does that mean the adapter on this trans will work with a 205 (maybe with some modification)?

10-29-2022, 02:28 PM	#1
Accelo Senior Member Join Date: Mar 2015 Location: washington Posts: 2,201	Re: Is this a TH400 or 4L80?? Unlikely you will find the long foot 71-85 GM TH400 to NP205 adapter. Advanced Adapters has a reproduction that sells for $270. Yours works fine. The difference between the usage is in the cross-member. The short foot, that you have, typically have an asking price of around $400. Unsure if they actually sell many for that price or not?

10-29-2022, 02:56 PM	#2
dieseldawg142 Registered User Join Date: Jul 2011 Location: back 40, bc Posts: 3,808	Re: Is this a TH400 or 4L80?? yep, T400 with a 208 adapter. i have a T400 with a 205 in my crew.



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