Doubler question with sm465

[Madmudder1234]

Hello, I was thinking of installing a doubler kit into my truck but I have a few questions.

1. it has a sm465/205 in it right now. this means I have a 10-spline output shaft on my 465, right?

2.I can get a 203 from a th350 will this have the 32 spline input on it?

3. is there a way i can change the output shaft in my 465 to 32 spline, or is there an adaptor i can use rather than buying another 465/208?

thanks for your help

 

[4X4HIGH]

Hello, I was thinking of installing a doubler kit into my truck but I have a few questions.

1. it has a sm465/205 in it right now. this means I have a 10-spline output shaft on my 465, right?

2.I can get a 203 from a th350 will this have the 32 spline input on it?

3. is there a way i can change the output shaft in my 465 to 32 spline, or is there an adaptor i can use rather than buying another 465/208?

thanks for your help

1. Depending on what year the tranny is and what t-case is behind it it's either an early 10 spline or the later 32 spline.

2. A TH350 version 203 is 27 spline. You need the ultra rare 32 spline 203 if you have a 32 spline trans. If you have a 10 spline trans then you need a 203 from behind a SM465.

3. Not sure on this one but IIRC there is some kind of conversion shaft or coupling available.

 

[Madmudder1234]

Thanks for the help so far. I went out to the garage and pulled it all apart and I have a long 32 spline output shaft so I need to find a 32 spline input 203? also is this shaft to long?

 

[blowedupmotor87]

Straight from ORD's website:

[FONT=Arial, Helvetica, sans-serif]GM SM465 4 speed Manual Transmission:
If you have an SM465 transmission there are 3 ways to mate it to the NP203.[/FONT]
[FONT=Arial, Helvetica, sans-serif]1: Use a factory configuration. GM mated the NP203 to the SM465 in 1973-1975 using the 10 spline output in the 465, a 10 spline female input in the NP203 and a 4.25" adapter housing between the two. This configuration was used in a wide range of GM trucks but is somewhat rare. Problems are the 10 spline connection tends to wear in the long term and it's difficult to find. Positives would be the short length and the ability to use the common 10 spline output in the transmission.[/FONT]
[FONT=Arial, Helvetica, sans-serif]2: Use a SM465 that was originally mated to an NP208 transfer case. This 465 will have a 32 spline output shaft with a 8 3/8" adapter housing. You'll use a NP203 gearbox with a 32 spline input gear and the face of the 203 drilled and tapped with the GM round bolt pattern to match up to the factory 208 adapter housing. This works very well if you have the available length in the vehicle since the parts are commonly available and the 32 spline connection is very strong and durable.[/FONT]
[FONT=Arial, Helvetica, sans-serif]3. Use the factory SM465 to NP203 adapter housing with ORD's new 32 spline SM465 output shaft and a 32 spline input gear in the NP203. This allows the shortest overall length with the highest strength, most durable spline connection.[/FONT]






[FONT=Arial, Helvetica, sans-serif]I have option 3 in my rig and I really like it but, you do have to tear into the 465 to switch the output shaft.
[/FONT]

 

[Madmudder1234]

Ok I went straight to the source and called ORD and this Is what Need to do.
first get a sm465 to np208 adapter, redrill and tap the holes on 203 to fit the 208 adapter and get a replacement input gear for my 208 and everything is good! oh and I need to find a 32 spline input 203, Ill probably just buy one off of their site

 

[Madmudder1234]

P.s. I need the 465 to 208 adapter because of the length of my output shaft, if anyone was wondering

 

[bp71k5]

If you already have to drill and tap the 203 for the round pattern, you can also enlarge the input bore and swap in a different input gear and bearing. That's what I did.