205 info

[killerbugsbunny]

All I need is the bare facts on what it takes to mount a np205 to my sm465. What's needed? Is it a direct bolt on? Oh yah, I own a 90 K5. Tons of mods already done. /forums/images/graemlins/1zhelp.gifGetting ready for the winter projects up here in canada.

 

[Waxer]

you will need the np205 to sm465 adapter and sleeve. Ofcourse gaskets for the two as well as some RTV for oil sealing. Just the gasket alone isn't enough.

 

[BadDog]

Also, there are 2 setups for that apparently. There is the long output 32 spline, and the old shorter 10 spline. The 10 spline is far more common, I’ve heard of the long output with a 205 but I’ve never seen one. You need to get the 205 that matches the tranny your using. You'll also need the correct cross member. And if you don't already have the 465 in and working, add flywheel, bell housing, clutch mechanism, etc...

 

[Waxer]

Fortunately I can verify that the crossmember that works with the th350/np203 + th350/np205 will also work with the sm465/np205.

How do I know? Cause I ran all 3 configurations with the same crossmember.

 

[Leadfoot]

Yes and no. Older (73- to roughly 83/84 and Wes knows for sure)trucks all used the same "flat" crossmember (no matter what tranny or t-case) only in different spots on the frame (some trucks were predrilled for all possibilities). Newer (83/84+)trucks used a "double hump" style crossmeber (no matter what tranny or t-case) only in different spots on the frame (some trucks were predrilled for all possibilities). Depending on the style 205 (six bolt round vs. figure 8) they used a different style adapter, made for the different style crossmember. Also as stated the 205 was mated to the older style 465's differently (10 spline male on the t-case with 10 spline coupler) vs. the newer 465's (32 spline female on the t-case that mated directly to the tranny). I think you can put newer style crossmembers on older trucks and vice versa, but you need all the components (same vintage t-case, adapter, and crossmember), but others may know for sure.

 

[BigOrange90Jimmy]

32 splines were in the 1 ton trucks from 87-91 i think. you will also have to figure out a way to get your electronic speedometer to work on the 205, unless you can find a 205 from a 90-91 1 ton. if all else fails, see if Donovan will do the conversion for you. he did mine and Steve's.

 

[killerbugsbunny]

I never considered the speedo, Thanks for the info guys. Think I'll hold off until I break the tcase I have already.
Or is there a conversion kit for the 205 and my computer in the truck??

 

[thatK30guy]

First off, you need to be able to determine what year your 465 is from. There are 2 versions of the 465. One has the 10 spline output shaft and the other has a 32 spline output.

The 10 spline runs up to '80.
The 32 spline starts at '81 and runs up.

In order to use the correct 205 to the 465, you need to find any 10 spline 205 from '84 on older to use with the 465 and and 205 from '85 on up to use with the '81 on up 465.

Get it?

The 32 spline 465 was started in '81, but they used the 208 t-case.
The K30's used the 10 spline 465/205 up to '84.
The following year of '85 is when the 205 was employed to the 32 spline 465.

So, to make a long explaination short, you need an '85 or newer 205 to use with any '81 and newer 465 with 32 splines.

But if you have the 10 spline 465, you need any '80 and older 205 or any '84 and older 205 from a K30.

The crossmembers run in the "flat" style up to '84.
'85 started the "double hump" members which use a shorter adaptor between the tranny and t-case, height-wise.

Since you have a '90 model truck, try to find a 465/205 from any '85 and newer K30 and you will be able to reuse the current crossmember under your truck now without modifications.