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 05-06-2016, 09:58 PM   #1
chrismoore701
Registered User
 
chrismoore701's Avatar
 
Join Date: Dec 2004
Location: Highland, IN
Posts: 2,326
Weirdest thing

I got my 79 stepside on the road tonight after my 8 year build. And the Trans is acting strange. I have it hooked up to the base plate vacuum. When I first fire it up and drive it. It will not shift until I drive it at least 4 blocks or so. Even after I drive it and it shifts good for a while. If I shut it off and then fire back up and drive. Same thing. At least 4 blocks. You would think maybe it was due to warming the Trans up. Put about 20 miles on her tonight. Picked up a new control module. See if that does anything. I pulled a vacuum and it held. So not sure
__________________
Chris
_______________________________
1979 Chevy Stepside SPORT
2018 Chevy Silverado, 39 years apart
My build 2008-2016. http://m.imgur.com/a/bURrE
chrismoore701 is offline   Reply With Quote
Old 05-07-2016, 01:22 AM   #2
nonstop
Registered User
 
Join Date: Dec 2014
Location: Northern California
Posts: 422
Re: Weirdest thing

Is the trans rebuilt? If so, when? If it's been sitting for a while, might be seals shrunk and/or hardened. I assume you checked the fluid level?
nonstop is offline   Reply With Quote
Old 05-07-2016, 01:59 AM   #3
frank69
Registered User
 
Join Date: Feb 2007
Location: Laughlin,Nv
Posts: 141
Re: Weirdest thing

Might be the governor sticking.
frank69 is offline   Reply With Quote
Old 05-07-2016, 08:12 AM   #4
chrismoore701
Registered User
 
chrismoore701's Avatar
 
Join Date: Dec 2004
Location: Highland, IN
Posts: 2,326
Re: Weirdest thing

I had sat for a while. I am a little over full on fluid. Should I suck some out? And it is leaking pretty bad. I am planning a visit to the guy that built it for me and see what he says
__________________
Chris
_______________________________
1979 Chevy Stepside SPORT
2018 Chevy Silverado, 39 years apart
My build 2008-2016. http://m.imgur.com/a/bURrE
chrismoore701 is offline   Reply With Quote
Old 05-07-2016, 08:52 AM   #5
TrailerTrash
Registered User
 
TrailerTrash's Avatar
 
Join Date: Jun 2015
Location: PA
Posts: 441
Re: Weirdest thing

where is it leaking from?
TrailerTrash is offline   Reply With Quote
Old 05-07-2016, 09:03 AM   #6
chrismoore701
Registered User
 
chrismoore701's Avatar
 
Join Date: Dec 2004
Location: Highland, IN
Posts: 2,326
Re: Weirdest thing

A couple spots. Looks like around the pan. But the worst spot is at the shifter linckage I have tightened the pan

History. Bought it around 96. Drove till 2004. Sat until 2013 or so. Then sent it back to builder and he freshened it up. Than sat until now. With firing it up from time to time and a trip around the block about 5-6 times. Here we are now.
__________________
Chris
_______________________________
1979 Chevy Stepside SPORT
2018 Chevy Silverado, 39 years apart
My build 2008-2016. http://m.imgur.com/a/bURrE
chrismoore701 is offline   Reply With Quote
Old 05-07-2016, 07:59 PM   #7
chrismoore701
Registered User
 
chrismoore701's Avatar
 
Join Date: Dec 2004
Location: Highland, IN
Posts: 2,326
Re: Weirdest thing

I replaced the control module. It is better but still has a hard time shifting when I first start off. But now will start to shift after about 1 block instead of four. Like I said it is a little over full. Should I suck some out?
__________________
Chris
_______________________________
1979 Chevy Stepside SPORT
2018 Chevy Silverado, 39 years apart
My build 2008-2016. http://m.imgur.com/a/bURrE
chrismoore701 is offline   Reply With Quote
Old 05-09-2016, 10:55 AM   #8
chrismoore701
Registered User
 
chrismoore701's Avatar
 
Join Date: Dec 2004
Location: Highland, IN
Posts: 2,326
Re: Weirdest thing

Seems like it needs to fill the torque converter before it will shift. Does this sound right? What about the governor? Had a friend of mine tell me to pop that open and have a look.
__________________
Chris
_______________________________
1979 Chevy Stepside SPORT
2018 Chevy Silverado, 39 years apart
My build 2008-2016. http://m.imgur.com/a/bURrE
chrismoore701 is offline   Reply With Quote
Old 05-09-2016, 04:22 PM   #9
trixter99
I have no time for this
 
trixter99's Avatar
 
Join Date: Dec 2002
Location: Fort St John B.C. CANADA
Posts: 434
Re: Weirdest thing

Take it back to the builder he is the best bet at getting it diagnosed properly. We can only guess what is wrong without actually see it running.
__________________
1986 Chevy short box ( PROJECT )
1994 Chevy Blazer lifted 6"
2009 Gmc 2500 HD
1999 Hugger orange Camaro SS
2007 BMW X5 Sport
trixter99 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 12:01 AM.


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