Will 4.3 700r4 mate with np208

[Grpkewlaid]

Hello,Does anyone know if the 700r4 in the 4.3L S10 4x4 will work with a NP208? I'm looking for a transmission for my 84 K1500 and I do not want to leave any stones unturned.I can find 4.3L S10 4x4's everywhere.I know the 2wd 4.3L trans will work on a V8 2wd,however I am unsure about the 4x4 aspect because they use different transfercases.
Thanks,
Kevin

[sled_dog]

are you a native english speaker? Anyway, as long as you have the adapter and the 208 was originally behind a 700R4 yes you can use it. 700r4s have a 27 spline output shaft. Just need a 208 or 241 with a 27 spline input. The only other 208/241s are 32 spline input units from behind TH400s and SM465s.

[Grpkewlaid]

Originally Posted by sled_dog

are you a native english speaker?

I is been talking english longtime.Thank for you concerned!!And thank for you anser queston Is the post to your liking now?
Thanks,
Kevin

[gottagofast]

the 4.3 version is not as stout as the v-8 version ... one less clutch disc and doesn't shift as hard ... but the one in my v-8 fullsize is doing fine.... don't expect it to last if you tow alot or beat the crap out of it though

[SpanishTrail]

Tranny cooler makes a huge difference too... I mean a good one, not the POS in the radiator.

[orangefj45]

Originally Posted by gottagofast

the 4.3 version is not as stout as the v-8 version ... one less clutch disc and doesn't shift as hard ... but the one in my v-8 fullsize is doing fine.... don't expect it to last if you tow alot or beat the crap out of it though

which clucth pack are you referring to?

and as long as it's a th700 out of a 4wd s10. it'll work fine. another difference is that the 4.3 converter has a higher stall than the 5.7.

[big83chevy4x4]

Originally Posted by orangefj45

which clucth pack are you referring to?

id like to know as well, never found a difference in them.

[gottagofast]

Originally Posted by big83chevy4x4

id like to know as well, never found a difference in them.

I'm sorry I can't be of more help but it's been years since I had them apart and I am not knowledgeable enough to say for certain what every part is in the trans.... I have a pretty good idea how they work and have had prob 6 or 8 apart and put them back together. My experience is from changing output shafts from 2wd to 4wd which of course go in from the front and require one to take everything else out for access. When I've done this in the past I always took anything from the old trans that apeared to be in better condition than the same part in the "new" trans and used it instead. I think it MAY be 1-2 clutches or 1-R. Let me stress I am NOT a highly experienced trans rebuilder. Perhaps someone who really know their sheet will pipe up and provide more details.
Kevin

[big83chevy4x4]

the output shaft does not go in from the front, it won't fit. it does go in threw the back with a small snapring holding it in from the front. you don't have to take everything out either, just to the second planetary gear. that is where the snap ring is.

ive rebuilt quite a few 700r4s, every 4.3 version and v8 version tranny have the same exact internals as the next. its when you get into aftermarket is when you get more clutches. more clutches means more holding power, but you get too many in there and they start to get thin causing them to heat up too much and burn.

[Grpkewlaid]

I just wanted to let you guys know that I appreciate you sharing your knowledge with me.It is nice to know that there are still 700r4s in the junkyard. They are just hiding in 4.3L S10 trucks and blazers that make up 30% of the truck section that your average scrounger like myself doesnt look twice at.Again,thank's for giving me a couple of new rocks to look under.

[gottagofast]

ok let me rephrase you gain access to the snap ring that allows the output shaft to be removed from the front but yes the shaft itself does go out through the back. correct you don't have to take everything out BUT you have to pull ALOT of items and it is more of a job than most want to get into. Last they are NOT all the same. I have found differences other than first and second gen more than once. It may be that they are not ALL different but I guarantee that SOME are. possibly ther are light duty and heavy duty versions. The thickness of the discs and steels were all the same between trannies but the difference was in either the heavy plate (don't know correct name) or the hub (?)

[orangefj45]

you're talking about the "pressure plates". and yes, both you guys are right about the output shaft. normally people say it has to go in from the front sonce it's one of the first parts that gets installed in the case when a trans is built.
and fwiw, if you're gonna replace the output shaft in a trans and have to tear it most of the way apart to do so, would'nt it be a smart idea to take it all the way apart so you can inspect every component for possible probelms?! make sense to me.
if any of you guys need psrts to rebuild your transmissions, pm me. i sell that stuff for a living.

[big83chevy4x4]

as do i , more as a hobby though

the few output shafts swaps that i have done were on a newly rebuilt tranny, not even run yet. thats why i didn't inspect everything, because i inspected it the first time.

my guess is that the two trannies were 2 different years, thats why they have different amount of clutches.