which t-case do i have?

[krawler12345]

i was wondering how to tell what kind of transfer case i have?
the truck is a 1973 chevy pick up, and the tranny is a 700r4.
does it say on the case somewhere?

thanks.

[weaselzz]

well if you are sure its a 700r4 then it would probably be a np208, but 73's came with a th350 so then it would be an np203. The 208 is all aluminum while the 203 is huge and has and iron and aluminum tailhouseing.

[gfbgreaser289]

you dont have a 700r4. they never came in that year. i dont think they were around until early 80's. chances are you have a th350,np203. thats what my 73 half ton sb had. look on the back of the t-case. if there are three lil bolts holding down a small round circle its a 205. if you have a hurst shifter sticking up out of the floor its a 203. if its aluminum its a 208. if the tranny is held to the t-case with 4 bolts is a th350. if it bolted together with 6 bolts its a th400

[Backncardr]

My 1973 has a 205 fwiw.

[krawler12345]

the guy i bought it from replaced the th350 with a 700r4, because the 350 blew up.

[SouthernK5]

most likely its a 208

[krawler12345]

is the np208 t-case strong?
what are the pro's and con's?

[trkklr77]

weak ass crap but a 2.62 reduction is a plus.

you can toss some money at it and get it to hold a 205[1.96:1], or hunt down a p-side 241+adapter and have a much stornger case witha 2.76 reduc.

[Black Dog]

Your transfer case could be a 203, a 205, a 208, or a 241. These people are only guessing without some more description or a picture.

[derek840378]

Your transfer case could be a 203, a 205, a 208, or a 241. These people are only guessing without some more description or a picture.
208 is the most common x-case behind a 700r4

[Jrod-13]

whats the shift pattern on the T-case?

thats the obvious way to tell...

[trkklr77]

Your transfer case could be a 203, a 205, a 208, or a 241. These people are only guessing without some more description or a picture.


241, not that lucky
203 not likely behind a 700r4
205 not likley behind a 700r4
208, very very very common behind a 700r4
231, not a chance as its a d-side case on a p-side truck.


all the shift patterns are low, n, h2wd, h4wd except for the 203 which is lo lock, lo, n, hi, hi lock.

[Jrod-13]

241, not that lucky
203 not likely behind a 700r4
205 not likley behind a 700r4
208, very very very common behind a 700r4
231, not a chance as its a d-side case on a p-side truck.


all the shift patterns are low, n, h2wd, h4wd except for the 203 which is lo lock, lo, n, hi, hi lock.

no, they aren't;

aluminum chain drive cases are 2wd, 4wd, n, 4lo
the 203 is low lock, low, N, high, high lock
the 205 is 4lo, N, 4wd, 2wd.

thus, the easy way to tell is the shift pattern.

Chances are, the truck has a 203 in it, as they tend to be more common behind the th350.
the fact that it has a 700r4 in it now, means nothing. I highly doubt that the previous owner would go through all the work to change the driveshafts around to get a 208 to work in the truck, for no reason..:confused:

[trkklr77]

yeah but its ahell of alot easier and cheaper to do that than try to adapta 203 to the 700r4.


no, they aren't;

aluminum chain drive cases are 2wd, 4wd, n, 4lo
the 203 is low lock, low, N, high, high lock
the 205 is 4lo, N, 4wd, 2wd.

you may be right about the 208/241, you said the same as i did for the 203, but you had better think again about the 205, 4lo, n, 2wd, 4hi


and yes it does say on the case, a 203/205 will have a blue rectangular tag between the the front output and the adapter houseing. the 208/241 will have a silver and red circle tag on the back.

[fiftyfifty]

send a pic or look at aa or other web sites to find one that looks like yours

[Black Dog]

Yay, more guessing.

[Jrod-13]

you may be right about the 208/241, you said the same as i did for the 203, but you had better think again about the 205, 4lo, n, 2wd, 4hi



yeah, I guess I mistyped the pattern on the 205, I meant to retype what you had wrote.. :laughing:
Even still, looking at the shift pattern is a pretty way to tell.

[bigblackblur]

:thisthreadisworthlesswithoutpics:

[hy_desert_4wheeler]

[QUOTE=trkklr77]weak ass crap but a 2.62 reduction is a plus.[QUOTE]


Obviously another idiot that has no expierence with a 208 and just goes by what he hears from other idiots..I have an 86W150 with a cummins and a 208.. I broke the 205 that was originally behind the Cummins about 5 years ago and swapped in the 208.. then about 3 years ago when the frame of the truck broke I swapped the engine tranny and Tcase into the 86.. three years later and no problems with any of the drivetrain components..

As far as what Tcase krawler has it coul be anything if the tranny was swapped however I really doubt it would be a 203 since I believe 74 was the first year for it and nobody in their right mind would swap a 203 in..

[trkklr77]

[QUOTE=trkklr77]weak ass crap but a 2.62 reduction is a plus.[QUOTE]


Obviously another idiot that has no expierence with a 208 and just goes by what he hears from other idiots..I have an 86W150 with a cummins and a 208.. I broke the 205 that was originally behind the Cummins about 5 years ago and swapped in the 208.. then about 3 years ago when the frame of the truck broke I swapped the engine tranny and Tcase into the 86.. three years later and no problems with any of the drivetrain components..

As far as what Tcase krawler has it coul be anything if the tranny was swapped however I really doubt it would be a 203 since I believe 74 was the first year for it and nobody in their right mind would swap a 203 in..


try again pudd, funny how almost every single one i come a cross at the junk yard are busted in half, spit the chain through the case, or has the slip yoke tail shaft torn off.


"but the cucv trucks have them" yeah and they also have 6.2 diesels and the blazers have 3.08 gears, the best choices right?!

id like to see a 208 last more than 6 month uder my truck or 2 days under a 700hp mud drag truck. kind funny how every one pulls out the nearly indestructable 205s and swap in the 208s huh, youd think it would go the other way?


"and nobody in their right mind would swap a 203 in"


no they wouldnt, at least not all of it any way.
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[hy_desert_4wheeler]

[QUOTE=hy_desert_4wheelerweak ass crap but a 2.62 reduction is a plus.


try again pudd, funny how almost every single one i come a cross at the junk yard are busted in half, spit the chain through the case, or has the slip yoke tail shaft torn off.

You know it is ignorant COCKSUCKERS like you that start dumbass rumors and give shit a bad rep without trying it.. I have personally tried it and even though I break all kinds of shit including the nearly industructable 205(behind an auto no less), the frame of the truck that it was in multiple places, a couple Np435's in another truck.. The 208 has been behind the Cummins 2 1/2 times the time it took me to break the 205 and I have not driven it any easier than I did with the 205..as far as the Damage you point out above the chains through the case and the tailshaft torn off are due to lack of maintenance or for a simple minded person like you it was run low on fluid..the broken cases are most likely due to making contact with some object or running Driveshafts that are too long.. when you lift your truck measure for your new shafts correectly and run your skidplates and you will prevent most of that.. By the way with the 205 you can break the adapter or the tranny when it hits something..

"but the cucv trucks have them" yeah and they also have 6.2 diesels and the blazers have 3.08 gears, the best choices right?!

I do not know what your point here is other than to show how ignorant you really are since I did not mention anything about cucv's,, however,,for their intended purpose they are an excellent choice.. I have driven I have driven M1008,,M1009, and M1010 in the CUCV line as well as the M886 and the M35 and they worked fine for their purpose..


id like to see a 208 last more than 6 month uder my truck or 2 days under a 700hp mud drag truck. kind funny how every one pulls out the nearly indestructable 205s and swap in the 208s huh, youd think it would go the other way?

If you were smart enough to fill it with oil and periodically check it it would probably outlast the rest of your junk.. as far as the mud drag truck goes alot of them use an open chaindrive setup not a real T-case,, however I personally would not be afraid to run a 208 in that application..


"and nobody in their right mind would swap a 203 in"


no they wouldnt, at least not all of it any way.
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I said thet because some people were guessing that the truck had a 203 which it would not have unless someone swapped it in but again you are to Dumb to know that.. now who's the pudd?? Dumbass