what front axle?

[nvrenuf]

To get square headlamps on an '80 you had to have the chrome grille option.

 

[HotRodPC]

I should have specified. Most '80 models got the square headlights and that was the only year that had square lights with the old style front end (except for a few very late 79's that were built with '80 trim).

All the '80 K trucks got the NP205.

Yep, ALL 80 pickups, 10, 20 and 30 series, Auto and Manual. All got the NP205. Wouldn't that have been cool if they did it for a few more year? That's how I know there are OEM adapters for all transmissions in the GM line up up to the date for NP205, and cuz 700r4 shares the same tailshaft housing pattern, then there is also an OEM NP205 apater for 700r4 also.

 

[bucket]

To get square headlamps on an '80 you had to have the chrome grille option.

I had forgot about that part. You always chime in with the good info

Yep, ALL 80 pickups, 10, 20 and 30 series, Auto and Manual. All got the NP205. Wouldn't that have been cool if they did it for a few more year? That's how I know there are OEM adapters for all transmissions in the GM line up up to the date for NP205, and cuz 700r4 shares the same tailshaft housing pattern, then there is also an OEM NP205 apater for 700r4 also.

There was never a 700r4 with a factory installed 205. But the th350 adapter works with a spacer, I do believe. I researched a while back but decided against the swap.

 

[HotRodPC]

I had forgot about that part. You always chime in with the good info



There was never a 700r4 with a factory installed 205. But the th350 adapter works with a spacer, I do believe. I researched a while back but decided against the swap.

Yes, that's what I'm saying. The tailshaft pattern of the 700r4 is the same as Th350, so there is such thing as an OEM 700r4 adapter for the NP205, even though they were never OEM matched. The output shaft splines are also the same.
NO, you don't have to use the space either. If the vehice was OEM Th350 and you wanted to go 700r4, then you'd have to shorten your rear dshaft, lengthen the front dshaft and move the crossmember. You only use the spacer if you want to put a Th350 in place of a 700r4 and NOT have to do any dshaft mods or move the crossmember. The 700r4 length also puts a better angle on the front dshaft since it's further back. This is why I chose to go ahead and use the spacer on my Th350 in the K1500. I can also swap a 700r4 back into the truck without any mods whatsoever.

 

[bucket]

Yes, that's what I'm saying. The tailshaft pattern of the 700r4 is the same as Th350, so there is such thing as an OEM 700r4 adapter for the NP205, even though they were never OEM matched. The output shaft splines are also the same.
NO, you don't have to use the space either. If the vehice was OEM Th350 and you wanted to go 700r4, then you'd have to shorten your rear dshaft, lengthen the front dshaft and move the crossmember. You only use the spacer if you want to put a Th350 in place of a 700r4 and NOT have to do any dshaft mods or move the crossmember. The 700r4 length also puts a better angle on the front dshaft since it's further back. This is why I chose to go ahead and use the spacer on my Th350 in the K1500. I can also swap a 700r4 back into the truck without any mods whatsoever.

The '81 and up th350's and 700r4's have a longer output shaft than the earlier th350's, that's why the spacer is needed to use a NP205 and th350 adapter behind a 700r4.

 

[HotRodPC]

I don't even know that, that is true Andy, I am farily certain, all squares starting in 73 had the intermediate shaft which is 9 inch. Most refer to it as the LONG shaft, but there is a 12in that is actually the LONG shaft Th350. But here, nor there, the size of the output shaft does not matter at all since you are not using a tailshaft housing on a Th350 or 700r4 in a 4x4, the Tcase adapter is your tailshaft, so the spacer is need for the length of the body of the case, and has nothing whatsoever to do with the tailshaft housing.

 

[bucket]

I don't even know that, that is true Andy, I am farily certain, all squares starting in 73 had the intermediate shaft which is 9 inch. Most refer to it as the LONG shaft, but there is a 12in that is actually the LONG shaft Th350. But here, nor there, the size of the output shaft does not matter at all since you are not using a tailshaft housing on a Th350 or 700r4 in a 4x4, the Tcase adapter is your tailshaft, so the spacer is need for the length of the body of the case, and has nothing whatsoever to do with the tailshaft housing.

Well sure it does. The 700r4 output sticks out way too far for the NP205 and th350 to bolt up. And you can't just cut the shaft down because the splines do not come back towards the tranny case far enough.

Before there was the spacer available, you had to buy a "conversion output shaft" in order to mate a NP205 to a 700r4. That shaft might even still be available somewhere.

 

[HotRodPC]

You're right if you're using a 2wd output shaft, but a 700r4 4x4 output shaft puts the same distance as 4x4 Th350 output shaft. You must use a 4x4 output shaft and no spacer needed on the 700r4 since the case body is longer. Only need a spacer on a Th350 to make it the same length case body as a 700r4, and to do that, then you MUST use a 2wd output shaft and cut it down, and yes, you do have enough splines to do it. Don't make me pull out a bunch of pics !!!

 

[HotRodPC]

Mano Man, are we ever trashing this thread !!! At least it's 4x4 related huh??? Have no fear Pops, it can be fixed.

Here is a 700r4 with a Tcase bolted to it. Notice, NO tailshaft. I can take that NP208 Tcase and adapter off, and bolt on a NP205 Tcase and Th350 adapter right on it WITHOUT a spacer just like the transmission is right there.

Here is a Th350 with the spacer and a cut off 2wd output shaft, to make it the exact same length, and same output shaft length as a 700r4.

 

[bucket]

You're right if you're using a 2wd output shaft, but a 700r4 4x4 output shaft puts the same distance as 4x4 Th350 output shaft

ONLY if you are talking about the '81-up th350 that never had a NP205 behind them. The earlier th350s have a short output. I'll look for a picture.

 

[bucket]

Mano Man, are we ever trashing this thread !!! At least it's 4x4 related huh??? Have no fear Pops, it can be fixed.

Here is a 700r4 with a Tcase bolted to it. Notice, NO tailshaft. I can take that NP208 Tcase and adapter off, and bolt on a NP205 Tcase and Th350 adapter right on it WITHOUT a spacer just like the transmission is right there.

Here is a Th350 with the spacer and a cut off 2wd output shaft, to make it the exact same length, and same output shaft length as a 700r4.

The 208 adapter is hollow, the 205 adapter has a bearing and coupler inside it.

 

[HotRodPC]

Here is a 700r4 with the OEM 4x4 output shaft. Ready to have any OEM Chevy Squarebody Tcase mounted to it with the correct OEM adapter, and NO spacer.

 

[HotRodPC]

ONLY if you are talking about the '81-up th350 that never had a NP205 behind them. The earlier th350s have a short output. I'll look for a picture.

The 208 adapter is hollow, the 205 adapter has a bearing and coupler inside it.

I guess I am not understanding what you're getting at. I know what you mean by the adapter having a coupler etc, but still the same output shaft in the transmission will fit both the hollow NP208, or the NP205 coupler/adapter. You don't have to use different trans spacers or different length output shafts in the transmission for the Tcase. The adapter takes care of that for you and the purpose of the adapter.

 

[bucket]

This is the only pic I have handy, I wish this bitch was turned around, lol. Anyway, the NP205 from behind a th350 has a MALE 27 spline input. The adapter has a bearing and a 27 spline coupler to mate the male output to the male input. The coupler splines start RIGHT INSIDE the adapter...

You must be registered for see images attach

That's my '80 205 and adapter BTW

 

[HotRodPC]

I wish I had a Th350 OEM 4x4 output shaft to go in this pic. This is pics of the 6in, 9in and the modified cut off 2wd output shaft that I made to make my Th350 the same case length as the 700r4. I know there is only 1 OEM 4x4 output shaft for ALL years no matter which Tcase, NP203, NP205, NP208, NP241C and NP241C was never mated to a Th350 either, but cuz it's the same adapter as an NP208, it also works.