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post #1 of (permalink) Old 06-15-2000, 10:28 AM
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401,400turbo,...205?

As some know I have a donor wag with a 401 and 400 turbo for my CJ.
I am still at a loss for what to do with the T/C. I have the stock Dana 20 but will need an adapter to make it work but is it worth the $ to use the Dana 20.

Also what else will bolt directly to the 4oo turbo without adapters? Will a GM transfer like the 205 work since its a GM tranny?

Also what reasons would I use one over the other. I know thats alot of requests but things are back in full swing with the project after thinking I was gonna have to sell the old girl.

Thanks for all the help.
Jim

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post #2 of (permalink) Old 06-15-2000, 11:51 AM
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Re: 401,400turbo,...205?

Yes, you will need an adapter for the 400. There was a fair amount of discussion about this on the Chevy board, you might try there. The TH400 was mated to the NP205, but it's a rare setup and was found only in specific models. As to the D20 vs NP205, the NP205 is a lot stronger, but the D20 is no slouch. Both have comparable gear ratios (2:1) that suck. And while the TH400 is a strong tranny (some say the strongest auto ever built), a lot of people switch to the TH350 due to its shorter length, stoutness, and the fact it doesn't rob as much hp from the engine as the TH400.

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post #3 of (permalink) Old 06-15-2000, 11:55 AM
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Re: 401,400turbo,...205?

I personally like the dana 20 t-case. It is all gear drive, so it is strong. It is compact, so you get to run a longer rear driveshaft, and there is a 3:15 low-range kit available, so you could install it and have some excellent off-road gearing. Th adapters are hard to come by though.

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post #4 of (permalink) Old 06-15-2000, 01:43 PM
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Re: 401,400turbo,...205?

you cant bolt on the np205 to a th400 out of a jeep.. it may have been made by gm.. but its for an quadratrac.. the rear of it is different than the common gm th400... you can find the adapters on ebay sometimes.. for under 200 bucks... and it would be a nice set up.

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post #5 of (permalink) Old 06-15-2000, 03:24 PM
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Re: 401,400turbo,...205?

<font color=purple>Unless that's a CJ8 or 6, I think you'd run out of room under there for such a long tranny AND T-case.</font color=purple>

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post #6 of (permalink) Old 06-15-2000, 05:55 PM
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Re: 401,400turbo,...205?

Jesse, who makes the 3:15 gear replacement for the D20? Is the kit a simple re-gear, or does it entail a lot of work? Thanks, Ricky...seeya...


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post #7 of (permalink) Old 06-15-2000, 06:24 PM
 
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Re: 401,400turbo,...205?

the Th400 used in Jeeps came in 2 versions
quadratrack ( the most common)
and dana 20

they are NOT interchangeable, but you can swao the output shafts and tailhousings to any Th400

you can also use a stock Chevy truck th400's output shaft and tailhousing to get a 205 behind your AMC cased th400, but like was told earlier itll be LONG.

unless your really lucky, youll spend more on the dana 20 adapter to a th400 ( even the factory Jeep one) than you would on another tranny.

try a AMCTF727 and a dana 300..

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post #8 of (permalink) Old 06-15-2000, 10:47 PM
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Re: 401,400turbo,...205?

The Jeep is a CJ-6,so I should not have a length problem , my concern is for the amount of money that advance adapters wants for the adapter kit.
Its not much less than a rebult 205, but if I need an adapter for that also it seems like another dead end.
I also have this complete Wag in my driveway if anyone knows anything I may want to strip off for the future or if anyone wants anything before it goes to the scrapper.

Thanks ,
Jim

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post #9 of (permalink) Old 06-16-2000, 05:30 AM
 
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Re: 401,400turbo,...205?

AMC TH400 are alittle different than normal GM's.
i mated a TH475 (motorhome tranny, thats just a beefed up TH400) to a chevy NP205 (pre 80' fixed yoke output) a few weeks ago using the GM factory Th400/NP205 adaptor (no spud shaft required), this i a great set up,
but you would then have adapt this to you 401. (or get a chevy motor)

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post #10 of (permalink) Old 06-16-2000, 06:45 AM
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Re: 401,400turbo,...205?

Hey the makers of the 3.15:1 kit are Teralow. Their website is www.teraflx.com. You have to poke around a bit, I belive under the catalog pick to get to the low range change kits for the different t-cases.

Biggjim:
What year is the wagoneer? I got the drivetrain out of a 72 waggy and the th 400 in that was a chevy boltpattern, with an adapter plate to the 360. If that is the case, the cheapest route might be to get a transmission and t-case (205) togther from a chevy, and then use that plate. Have you given any consideration as to how the crossmember will mount the th400-205 combo under the jeep? I am pretty sure you could use the stock crossmember with the dana 20, not sure at all with the 205. Just food for though.

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