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 > The 1973 - 1991 Blazers, Jimmys, and Suburbans Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 05-13-2009, 09:54 AM   #1
scruffre
Registered User
 
scruffre's Avatar
 
Join Date: Apr 2009
Location: Carrying Place, Ontario
Posts: 48
Question Auto to standard trans swap

I have the chance at complete 4speed set up out of an 86 1/2 ton 4x4. I was wondering if it would be a major job to swap out the 3speed auto and put the 4speed in my 78 Blazer?
scruffre is offline   Reply With Quote
Old 05-13-2009, 03:25 PM   #2
tvblazer78
Low & Fast!
 
tvblazer78's Avatar
 
Join Date: Jan 2007
Location: Knoxville, TN
Posts: 3,110
Re: Auto to standard trans swap

It's a lot of work, but it can be done. I bet someone will pop up on here that has done this before.

Anyone?
tvblazer78 is offline   Reply With Quote
Old 05-15-2009, 08:45 AM   #3
scruffre
Registered User
 
scruffre's Avatar
 
Join Date: Apr 2009
Location: Carrying Place, Ontario
Posts: 48
Re: Auto to standard trans swap

Forgot to mention that the Blazer has a 305 and the truck has a 5.7 (350) if that makes any difference
scruffre is offline   Reply With Quote
Old 05-15-2009, 01:25 PM   #4
72 CustomCamper
huh ???
 
72 CustomCamper's Avatar
 
Join Date: Nov 2002
Location: Fredericksburg,Va.
Posts: 3,368
Re: Auto to standard trans swap

One of the biggest things to check is, see if the 86 has a 1 piece rear main seal or not. The 1 piece seal's flywheel is different than the one for a 2 piece seal like your 78 should have. The 86 should also have a hydraulic clutch setup where the 78 would have a push rod and z bar setup. The motor size difference will not affect anything...


Chuck
__________________
90 Blazer Silverado 350w/ 700R4 and 32" Kelly's

"I am a bomb technician. If you see me running try to keep up!"
72 CustomCamper is offline   Reply With Quote
Old 05-23-2009, 06:40 PM   #5
scruffre
Registered User
 
scruffre's Avatar
 
Join Date: Apr 2009
Location: Carrying Place, Ontario
Posts: 48
Re: Auto to standard trans swap

Found out a bit more about the 4speed. It is hooked up to a 305 and the truck was an auto to begin with. I'm going out to have a look at it on Sunday and have a better look at what all will be involved in a swap. Wish me luck LOL
scruffre 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 02:56 AM.


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