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 12-23-2015, 04:16 PM   #1
ooimpalaoo
Registered User
 
ooimpalaoo's Avatar
 
Join Date: Jul 2011
Location: Vernon BC Canada
Posts: 287
3rd gear lags please help 71 GMC k10

my truck is lagging in 3rd gear. 1st is fine and never used as its so low why bother. 2nd is great and pulls hard. then i shift into third and i can watch the speedo start to drop. any help would be great. thanx
ooimpalaoo is offline   Reply With Quote
Old 12-23-2015, 04:21 PM   #2
GASoline71
"I ain't nobody, dork."
 
GASoline71's Avatar
 
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,971
Re: 3rd gear lags please help 71 GMC k10

Most 3 speeds the 2nd to 3rd shift is a pretty wide gap. You say it's a K10... lifted with oversized tires? That will just make it worse. What power plant? What gear ratios front and rear?

Lots of variables...

Gary
__________________
'cuz chicks dig scars...

My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread.

The Rebuild of Creeping Death after the wreck

Quote:
Originally Posted by LONGHAIR View Post
I would never rebuild a 305.
Quote:
Originally Posted by prostreetC-10 View Post
I love using vacuum gauges as part of the carb tuning process. I hook the gauge to the inside of my garbage can and leave it there.
Quote:
Originally Posted by Marv D View Post
Remember Murphys 2nd law of mechanical relationships... "OPPOSING COMPONENTS ATTEMPTING TO OCCUPY THE SAME SPACE, AT THE SAME TIME, GENERALLY END UP OCCUPYING ADJOINING SPACE AT THE BOTTOM OF THE OIL PAN"
Quote:
Originally Posted by cableguy0 View Post
Its cheaper to listen to advice given when you ask for help than it is to ignore everyone and wait for carnage.
GASoline71 is offline   Reply With Quote
Old 12-23-2015, 04:22 PM   #3
geezer#99
Registered User
 
geezer#99's Avatar
 
Join Date: Aug 2009
Location: Bowser
Posts: 13,731
Re: 3rd gear lags please help 71 GMC k10

Should otta stop towing that ford!! LOL!!

Could be lack of timing!
What's your initial timing?
geezer#99 is offline   Reply With Quote
Old 12-23-2015, 04:27 PM   #4
ooimpalaoo
Registered User
 
ooimpalaoo's Avatar
 
Join Date: Jul 2011
Location: Vernon BC Canada
Posts: 287
Re: 3rd gear lags please help 71 GMC k10

motor 350 ...tires 35" gears? everything is new
ooimpalaoo is offline   Reply With Quote
Reply

Bookmarks

Tags
3rd, gear, lag


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 07:08 AM.


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