Is there any way to mate a 205 t-case to a 700r4 tranny? does advance adapters make an adapter...I either want to put a 205 in or convert my 208 to a fixed yoke...which is more feasible? thaks gang...

Chris:smokin:

As far as I know there is not fixed yoke kit for the 208. THere is one for the 241 that came after the 208. Should be able to hook a 205 to a 700R. Just need to find the right adaptors. the 700 looks like a TH350. I think there may be a sline count or length issue. Advanced should have the parts you need. The hard to find part will the the TH350 FIXED yoke NP205. The 71-72 were the most common years. Very rare to find them behind a TH350 after that.
in 80 ALL trucks had the NP205 but they were slip yoke. They can be converted to fixed yoke by getting the parts off a fixed yoke for a TH400 or SM465 but then your having to buy 2 cases to make one.

You do not need an adapter. You just need to buy the output shaft from AA. The 700r4 one is too long. The last time i checked it was around $185.
And if you do want a fixed yoke, look around for a junk 205, i found one for $50 and did the swicht in less than a hour.

As far as a kit to switch the 208 to a fixed. I have heard of people doing it with a 208 out of a Dodge, but have never seen one or know any more about it than that.

A new output shaft would be a good idea if u are having a tranny built for you...or your current one torn down. From what I understand, when you take a 700 apart...the output shaft the VERY last thing to come out...so unless you do it yourself, you are talking about some spendy shop time.

Why not just use an advanced adapters 700-to-205 adapter? It'd cost way less than the $185 shaft + labor. I have also heard that you can use some sort of spacer. The problem is that the output shaft from the 700 is too long (thankfully, it has the right # of splines). At any rate, I don't know if the spacer is a custom thing or if someone actually makes one for this specific purpose or what.

hope it helps,

J

Why not just use an advanced adapters 700-to-205 adapter?

Do they make one? The last time i checked (about a year ago) the only thing that you could get was the shaft.


The spacer is a good idea and sure would not be to hard to make if you have a lathe, and i might even go with that idea. I am putting the 700r4 and 205 in my Jeep and length is an issue. The spacer would only have to be about 1-2" long.

I check with AA and the replacement ouput shaft for the 700R4 is $171...the other options include what I believe to be spacers but therre are like $480 a piece:mad: You can see the adapter possibilities HERE (http://www.advanceadapters.com/acrobat/gm.pdf) I really don't want to have to tear down my 700r4 but I just may...I have a freshly rebuilt one that i may put in while I rebuild the one that is currently in the truck...during the rebuild I will throw in the shaft...If any of you decide to make an adapter on your own...LET ME KNOW...I will reimburse you handsomely:beer: :beer: :beer: :beer: :D :D We'll see how it turn out...so did ALL 205's have a fixed rear output yoke or were there some that had the damn slip yoke? which ones have the more desireable fixed yoke?

:flipoff2: CHRIS:flipoff2:

the 1980 205 had a slip yoke....avoid that year like the plague....every other 205 that I know of is fixed...like all yokes should be.

J

just glancing at the list...looks like the AA 50-6900 is what ya need. i dunno...maybe I am just reading the chart wrong...

J

Hey Jek, you are right about the Part #, the 59-6900 is the output shaft for the 700r4 to allow it to work with the 205 t-case...I really didn't want to change the output of my tranny but I guess I will unless I can manage to afford the $500 spacer...

:flipoff2: Chris:flipoff2:

i don't know about the 700r, but i just swaped tailshafts on a th350. converted a 2wd trannie to 4wd and it wasn't bad to do at all. just get a good manual or book so you know for sure how it all goes back together. might need to get some new seals and gaskets is all.

of course you may tear it down and find you could use a rebuild anyway.

OK,,i might be thinking outta my a$$ here,,but if the only thing keeping you from bolting your case to your tranny is the shaft itself,,,,,why not just cut the shaft to fit right ? if it would bolt right up with no other problems then why not do it,,after all,,,,$20 in sawzall blades is one hella cheaper than a $500 spacer. Or would you still need some kind of spacer anyhow for the mid shaft to connect the two ??
just throwing out a late night idea,,lol

k5 king,

depends on how far back the shaft is splined. i wanted to do this to my 2wd case but would have ended up cutting all the splines off:eek: might work though. he'll have to bust out the ol measuring tape:cool:

Originally posted by k5king
OK,,i might be thinking outta my a$$ here,,but if the only thing keeping you from bolting your case to your tranny is the shaft itself,,,,,why not just cut the shaft to fit right ? if it would bolt right up with no other problems then why not do it,,after all,,,,$20 in sawzall blades is one hella cheaper than a $500 spacer. Or would you still need some kind of spacer anyhow for the mid shaft to connect the two ??
just throwing out a late night idea,,lol

Definately don't cut it. You won't have enough spline area sticking out.

As far as fixed and slip yoke 205s. I think most 80's and up years had the slip yoke.
Boss

Also the 700r4 has a 27 spline output shaft and th400 NP205 have a 32 spline input. I would look for one with 27 spline input like from a th350.

We just did this to my buddies trans.

The output shaft is spendy, but good. some of the oiling holes on the shaft have been mover from original specs and this helps to cobat the fact that 700's like to burn up. (bonus points for the shaft) downsides: need a trans guy to do it, as the shaft requires the complete dissassembly of the trans. :eek: =$$ Porblem # 2, the pan on a 700r4 kicks out like 2" on the passenger side. This leaves not a whole lot of room between the front shaft cv assembly and the pan. :(

Spacer- Cheeper, dont buy it from somewhere, find a local machine shop to make it. probably loke 40 bucks or so, all you need is a ring that is the correct thickness with the correct bolt holes. (sorry I dont remember the exact thickness right now.)
Downside: Messes up the driveshafts Even more. Adding the 3/4" or so spacer only moves the transfer case back more. this possibly requires more mods to the driveshafts, which might need adjustment anyway, (read: possible shortening or lengthening) = more money spent...Also, angles could make themselves troublesome at this point......

Other things to remember on the 205 swap: you will probably have different output styles on the 205 vs the 208. (flange vs yoke, etc. ) Not sure whats involved in changing these, but it may become an issue. And, the hole in your floor for the t-case shifter will be in a different place. due to case and lenth differences.



On the other hand, the 208 SYE is still very expensive and rather hard to find, i believe....

Any other q's, lemme know, ill try to help as best i can.

:D

sounds like the whole thing might be a real PIA. should concider a 241. nice low range and i'm pretty sure they make a SYE kit for it.

I dunno if anyone has looked at 241's lately, but the are getting expensive as hell!!!!! I'm looking for one now and it is unbeliveable what people want for these things, plus keep in mind the kit is another $300 plus. Almost makes a TH350 or TH400/205 swap sound like a good idea. Sure could buy a lot of gas for $$$ to convert a case or tailshaft.

If anyone had coinnections on guys either making the tailshaft, the spacer, or converting 208's I'd definetly be interested.

hey crunch,
The General on k5 had a 241 a while back for $225. i would have snagged it but i didn't have the dough. hard to find th350 version 205s too.

Doh! That is my luck... A dollar shy and a day late :(

Another alternative to moving your TC back and shortening the driveshafts is to move the engine forward. Don't know about post 72, but early models have lots of room to move forward and it looks like it would be much simpler. 2WD trucks mounted the engine at least 2 inches further forward than 4wd's.