203's 205's and adapters

[74poj]

got the typical 70's th350/203 combo. wanna swap in a 205 for obvious reasons. however, i'm having difficulty finding the th350 version of the 205. from what i've read on the net all th350's came with a 203 after 72. i've found a lot of sm465 versions, with the 10 spline input. i've also researched the cost of a 27 to 10 spline adapter and they seem to be somewhat reasonable. what seems to be unreasonable is the th350 to 205 adapter. eventually i want to do the sm465 conversion so getting the 27 to 10 adapter would have some purpose since i need the 10 for the sm465. bottom line here's my main question. will the adapter between my th350 and my 203 work with the 205? they look pretty much the same on the truck at least. thanx

 

[nvrenuf]

Sorry but they are different, the 203 adapter is about 1" thick whereas the 205 adapter is ~4" thick. Also the bolt pattern of the t-case face is different.

 

[BizeeB65]

Keep searching buddy. It just takes patience. I finally found mine in a junkyard 60 miles away. But its gonna be worth the price.

 

[b454rat]

Where in CO are you?? There is a junkyard near Erie, can't remember the name tho, they had alot of 4wd's, they might have something. If you can't find any, drop me PM, I think I tripped over one yesterday in a junkyard here.

 

[JeffHK5]

I have owned three TH350/205 combos , they all came out of Suburbans. Don't know why that is , it just is.

Next time your in Cincinnati, come by I'll make you a smoke'n deal on every thing you need to put a 205 in your rig.

Jeff

 

[BizeeB65]

Well, I am over in Louisville, and if my deal falls through, i will be messaging you.!

 

[JeffHK5]

I know this ain't the "fore sale" section but I do have a complete set-up.

When I broke it apart to make it easier to move I did notice that the drive sleeve is about killed. I don't think I've seen one with more than 50K miles on it that wasn't worn-out. It's out of a Sub so it has a slip-shaft style rear output.

Jeff

 

[74poj]

thanks guys! not to jack it into a for sale/parts needed thread but........i don't get out east too often and can't imagine the shipping on a whole setup. if any of you have this part https://eshop.advanceadapters.com/commerce/catalog/product.jsp?product_id=1470&czuid=1145968551502 around, it's really what i need. i can get 10 spline 205's out here all day, cheap, and the $100-150 for the input adapter i can deal with. what just seems outrageous is the $276 they want for this guy.

 

[JeffHK5]

So what your looking for is a 27 spl in-put for your 205 that's currently set-up for 10 spline? And you also need a th350 to np205 adapter and coupler sleeve? The GM version of what AA is selling can be found on ebay for half the price.

Or am I missing something?

The "input adapter" you speak of has 10 spl. on one end and 27 spl. on the other ?

Jeff