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 > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 07-10-2018, 10:55 PM   #1
GMC85HighSierra
Registered User
 
GMC85HighSierra's Avatar
 
Join Date: Sep 2016
Location: Morrice, MI
Posts: 135
Trans/T-case Questions

Hello, I have been doing research on the automatic 73-87 trans/t-case setups. Attached is the information I have gathered. The only part I'm not sure on is the output shaft stickout length for the 700R4. I read that it sticks out 2" further than the TH350 to the NP203/NP205. Just seeing if the information I found is accurate. Thanks
Attached Images
 
__________________
1987 GMC Sierra "Lazarus"
1987 GMC 3+3 "Four Double O (400)"
GMC85HighSierra is offline   Reply With Quote
Old 07-11-2018, 08:06 AM   #2
Greenlee
Senior Member
 
Join Date: Jun 2004
Location: El Lago, TX
Posts: 1,459
Re: Trans/T-case Questions

You planning a swap? Not sure if this helps, but went from a a 700r4 with NP208 to a TH400 with NP208 and the length was essentially the same. I assumed I was going to need drive shaft work, but the old one fit just fine.
Greenlee is offline   Reply With Quote
Old 07-11-2018, 08:08 PM   #3
GMC85HighSierra
Registered User
 
GMC85HighSierra's Avatar
 
Join Date: Sep 2016
Location: Morrice, MI
Posts: 135
Re: Trans/T-case Questions

I'm not really doing a swap... I'm building a crew cab from the main pieces (the cab, front clip, and frame/axles; no engine/trans/t-case on the frame). I have a 400 engine for my crew cab, but looking at getting a TH400/NP208 combo for it. I have a 2WD TH400 HD trans, but obviously the output shaft is different than the 4WD. Might have this combo soon at my place; awaiting reply for the guy who has the combo.

I just wanted to have these measurements on hand in case I do need them for the future. The only one I didn't find directly was the 700R4 output shaft
stick out length. I attached a pic of what I'm looking for (trans is aTH350 pictured; need measurement for 700R4). Thanks
__________________
1987 GMC Sierra "Lazarus"
1987 GMC 3+3 "Four Double O (400)"
GMC85HighSierra is offline   Reply With Quote
Old 07-11-2018, 08:16 PM   #4
GMC85HighSierra
Registered User
 
GMC85HighSierra's Avatar
 
Join Date: Sep 2016
Location: Morrice, MI
Posts: 135
Re: Trans/T-case Questions

Here's the pic (forgot to attach it). Thanks
Attached Images
 
__________________
1987 GMC Sierra "Lazarus"
1987 GMC 3+3 "Four Double O (400)"
GMC85HighSierra is offline   Reply With Quote
Old 07-11-2018, 10:29 PM   #5
abig84
Registered User
 
abig84's Avatar
 
Join Date: Jan 2017
Location: wheaton IL
Posts: 616
Re: Trans/T-case Questions

Might even be more then 2 inches. You can probably measure the thickness of the th350 to np203 adapter which is like 3/4 inch thick and minis that off how ever thick the 700r4 to np208 adapter. Not quite sure if that would be accurate thougn
abig84 is offline   Reply With Quote
Old 07-12-2018, 08:04 PM   #6
GMC85HighSierra
Registered User
 
GMC85HighSierra's Avatar
 
Join Date: Sep 2016
Location: Morrice, MI
Posts: 135
Re: Trans/T-case Questions

Yeah I was just looking for the stick out length on the 700R4 attached to an NP208. I read you need a 2" spacer to be able to use a 700R4 with a NP203 or NP205, so I assumed take whatever the length of the output shaft on the TH350 is and just add 2" on to it. So I came up with 2 7/8". Thanks
__________________
1987 GMC Sierra "Lazarus"
1987 GMC 3+3 "Four Double O (400)"
GMC85HighSierra is offline   Reply With Quote
Reply

Bookmarks

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 11:34 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.
Copyright 1997-2013 67-72chevytrucks.com