The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Engine & Drivetrain

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 04-02-2014, 10:07 PM   #1
zpeters18
Registered User
 
Join Date: Mar 2014
Location: pennylvania
Posts: 3
TH400 to SM465

hello. i recently purchased a 1987 gmc 2500. it has the turbo 400 trans and np208 transfer case. i am hoping to do a manual swap on it to a sm465 trans. what all would i need to do this? thanks
zpeters18 is offline   Reply With Quote
Old 04-02-2014, 10:13 PM   #2
Redcap
Registered User
 
Join Date: May 2010
Location: Lewis County, WA
Posts: 1,523
Re: TH400 to SM465

Besides the trans/transfer case, you'll need to decide if you want a mech or juice clutch...the pedal kits are different. You'll also need a flywheel, clutch, pedal box, floor hump (or cut yours), linkage or hydro components. You'll also likely need some driveshaft work done. Probably some stuff I've forgotten too.
__________________
'77 K35 - 454, SM465/NP205, 4.56 D60/14bFF
Redcap is offline   Reply With Quote
Old 04-02-2014, 10:19 PM   #3
zpeters18
Registered User
 
Join Date: Mar 2014
Location: pennylvania
Posts: 3
Re: TH400 to SM465

so not necessarily 'hard' , just finding all the parts to do it
zpeters18 is offline   Reply With Quote
Old 04-03-2014, 09:04 AM   #4
Rollo McFlurry
Registered User
 
Join Date: Dec 2012
Location: Hanston, KS
Posts: 94
Re: TH400 to SM465

Correct. It's easiest to have a donor truck. I would look for a transmission mated to an np205 with a fixed rear yoke. The slip yoke versions are also acceptable if you want less driveline hassle.
Rollo McFlurry is offline   Reply With Quote
Old 04-03-2014, 03:57 PM   #5
Wrenchbender Ret
Registered User
 
Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,190
Re: TH400 to SM465

You will need a bell housing to go with the SM465. It has a larger center hole then the 3 speeds or earlier models.
Wrenchbender Ret is offline   Reply With Quote
Old 04-03-2014, 05:54 PM   #6
zpeters18
Registered User
 
Join Date: Mar 2014
Location: pennylvania
Posts: 3
Re: TH400 to SM465

what would be easier? a manual or hydraulic clutch?
zpeters18 is offline   Reply With Quote
Reply

Bookmarks

Tags
1987, gmc 2500, sm465, th400

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 10:12 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com