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 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 10-05-2010, 09:34 PM   #1
sjarrett71
Registered User
 
sjarrett71's Avatar
 
Join Date: Dec 2006
Location: Rolla, MO
Posts: 2,463
Is This Legit?

Here is a Craigslist ad I found while looking for a TH400 transmission. Is this original or what?

http://stlouis.craigslist.org/pts/1990023697.html
__________________
-Scott-
sjarrett71 is offline   Reply With Quote
Old 10-05-2010, 09:40 PM   #2
Olden Days
Living In The Past
 
Olden Days's Avatar
 
Join Date: Nov 2003
Location: Rockies
Posts: 709
Re: Is This Legit?

I would think it is a TH375 except the year dont match his 86. Maybe it was not original to the van

copied from http://www.nastyz28.com/chevy-transm...tification.php

THM375: This transmission is a derivative of the THM400 sharing the external appearance of the 400. It'll be marked 375-THM on the bottom of the tailshaft housing. It's a light duty version of the THM400, has ABSOLUTELY NO RELATION to the THM375B, and was found in 1972 to 1976 full-size cars. The Turbo 375 was modified to accept the Turbo 350 driveshaft yoke.
Olden Days is offline   Reply With Quote
Old 10-05-2010, 09:44 PM   #3
pumpgas
Registered User
 
pumpgas's Avatar
 
Join Date: Dec 2008
Location: indiana
Posts: 304
Re: Is This Legit?

1 thing I know for a fact and that is a 350th tail shaft will in no way bolt to a 400th main case.
__________________
00' Z28 ("wifes" car)
92' Mustang w/sbc everything needs a little heart beat
87' GMC Sierra Classic Short Bed Fleet side almost stock
69' Chevy short step carbed 6.0 w/400th trans. Completed w/325 miles on it
pumpgas is offline   Reply With Quote
Old 10-05-2010, 09:50 PM   #4
sjarrett71
Registered User
 
sjarrett71's Avatar
 
Join Date: Dec 2006
Location: Rolla, MO
Posts: 2,463
Re: Is This Legit?

Quote:
Originally Posted by pumpgas View Post
1 thing I know for a fact and that is a 350th tail shaft will in no way bolt to a 400th main case.
Can you explain what the trans is then?
__________________
-Scott-
sjarrett71 is offline   Reply With Quote
Old 10-05-2010, 09:57 PM   #5
Hubscrub
Cruzin
 
Hubscrub's Avatar
 
Join Date: Dec 2009
Location: on the road
Posts: 2,835
Re: Is This Legit?

Quote:
Originally Posted by Olden Days View Post
I would think it is a TH375 except the year dont match his 86. Maybe it was not original to the van

copied from http://www.nastyz28.com/chevy-transm...tification.php

THM375: This transmission is a derivative of the THM400 sharing the external appearance of the 400. It'll be marked 375-THM on the bottom of the tailshaft housing. It's a light duty version of the THM400, has ABSOLUTELY NO RELATION to the THM375B, and was found in 1972 to 1976 full-size cars. The Turbo 375 was modified to accept the Turbo 350 driveshaft yoke.
i agree this trans here came out of a 86 1/2 ton i had it has a 400 shaped pan but its more like a 350 a half breed if you will
Attached Images
  
__________________
Lime Wife's 67https://www.google.com/url?sa=t&rct=...wZEMODaS2d94u8

Back to the Fifties 59 https://www.google.com/url?sa=t&rct=...NAeStpydfrcj_U

Proverbs 3:5,6

"Thanks to the Interstate Highway System, it is now possible to travel across the country from coast to coast without seeing anything."Charles Kuralt

In memory of our first baby daughter, daddy and mommy love you.
Danica Grace 6/26/14
Hubscrub is offline   Reply With Quote
Old 10-05-2010, 10:01 PM   #6
sjarrett71
Registered User
 
sjarrett71's Avatar
 
Join Date: Dec 2006
Location: Rolla, MO
Posts: 2,463
Re: Is This Legit?

Do you think it would be worth buying? I just want to drive my truck, it's no hot rod.
__________________
-Scott-
sjarrett71 is offline   Reply With Quote
Old 10-06-2010, 02:53 AM   #7
raycow
Registered User
 
Join Date: Mar 2003
Location: San Francisco, CA USA
Posts: 2,454
Re: Is This Legit?

Quote:
Originally Posted by pumpgas View Post
1 thing I know for a fact and that is a 350th tail shaft will in no way bolt to a 400th main case.
It doesn't really have a TH350 output shaft. It has a modified TH400 output shaft with the same spline size as a TH350.

Ray
raycow is offline   Reply With Quote
Old 10-06-2010, 04:49 AM   #8
rollinhard
Registered User
 
rollinhard's Avatar
 
Join Date: Jun 2010
Location: British Columbia
Posts: 192
Re: Is This Legit?

We just took a trany out of a 87 chev 2wd that looks like that and it looks like a th400 with a long output shaft. The guy put a 700r4 in out of a 89 rally van and it bolted in with no driveshaft modifacations and was splined the same. The guy at the trans shop had never seen a 400 with that long of an output before
Posted via Mobile Device
__________________
If you can't impress them with your inteligence, dazzle'm with your stupidity

1969 GMC lwb 2wheel drive can you say big stroker motor to come hehe

Last edited by rollinhard; 10-06-2010 at 11:37 AM.
rollinhard is offline   Reply With Quote
Old 10-06-2010, 09:09 AM   #9
Olden Days
Living In The Past
 
Olden Days's Avatar
 
Join Date: Nov 2003
Location: Rockies
Posts: 709
Re: Is This Legit?

Looks like there is such a thing as TH475 or (3L80HD) Here is a thread http://www.hotrodders.com/forum/gm-t...ans-93088.html where they are discussing it. Maybe will help
Olden Days is offline   Reply With Quote
Old 10-06-2010, 11:40 AM   #10
rollinhard
Registered User
 
rollinhard's Avatar
 
Join Date: Jun 2010
Location: British Columbia
Posts: 192
Re: Is This Legit?

after reading that im a little more confused. It seems like its a 3l80hd but the other guys r saying no its different. The one i have is th400 pan with 27 spline output just as the guy describes
__________________
If you can't impress them with your inteligence, dazzle'm with your stupidity

1969 GMC lwb 2wheel drive can you say big stroker motor to come hehe
rollinhard is offline   Reply With Quote
Reply

Bookmarks


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 10:08 PM.


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