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What 700R4s will fit...

CyberSniper

CyberSniper

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Are all 4x4 700R4s the same? Will one that originally had a NP231, NP207, NP208, NP241, et cetera bolt up to the others?

More importantly, what different versions will a NP208 bolt up to?

I have plenty of NP208 adapters. I'm just worried about output shaft lengths I guess.

/forums/images/graemlins/1zhelp.gif
 
all 4x4 700r4s are the same. all the 4wd output shafts are the same. you wont have a problem bolting the 208 adapter to any 700r4 until you get to a 96 4L60E which wouldn't work anyway because its computer controlled.
 
Alrighty... so as long as it's 81-91 and 4wd it'll bolt up and function as intended. Seems like 92 brought electronic valvebodies. Good deal. That's what I thought but I wasn't sure about the S10 stuff even though I've looked at them before.

I'm going to see if I can find an 89-91 IFS one then.
 
you can get a 87-92, in 93 is when they went to the computer stuff. the 88-92 are all the same, right down to the wiring.

i would stay away from the 82-84, 85-87, but 88-92 are the best one to find.
 
The NP 208's are not the same. There are 2 or 3 versions from Chevy.

32 spline input for SM465 trucks and
27 spline inputs for 700R4 trucks.

The TH350 had an NP208 also and I think it is a 27 spline input so it might work with a 700R4.

Harley
 
700r4s have the same tail housing pattern and spline count as the th350 trans. with the approx. same length as the th400...
The 700r4s that came behind the 2.8l V6 has a diffrent bellhousing pattern that will not work with the V8s.
 
I'm talking about the 27 spline version of the NP208 that came off a 700R4. Not the 32 spline version found behind SM465s and TH400s.

I know all the tailhousing patterns are the same. I was just wondering if they used different output shaft lengths. I was hoping they all got the same output shaft and they adjusted the transfer case with the adapter.
 
eh? So you're saying a transmission from a 1990 IFS truck won't fit my 198- NP208?
 
The length on the 700r4 output shaft is longer than the output shaft on the TH350, if your going 700-700 your fine if your going from a 350 to a 700 you will need a 3/4 or so spacer in between the adapter and trans or the correct adapter. If you have a 700 and are going to a 350 you will need the correct adapter as the splines will not fully engauge the sleeve inside the adapter...
 
Yeah, I know the output shaft on a 700R4 is quite a bit longer than a TH350.

I was looking to see what 700R4s I could use with a NP208. My memory told me that any and all 4wd 700R4s would bolt to a NP208 as long as I had the NP208 adapter.

IE: if I could get a 700R4 out of an S10 with a NP207 or NP231 and put it in front of a NP208 without issue.


See, I have 3 smoked 700R4s, 1 wore out NP208, and 1 good NP208. I need a 700R4 to go in front of that other NP208 that is good.
 
Anything associated with GM 60° 2.8L V6 sucks...

I'm not worried about the bellhousing, only the mating of my NP208 to a 700R4 that came with something besides a NP208 hooked to the back of it.
 
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