C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

Turbo 350 trans

Thread Tools
 
Search this Thread
 
Old Nov 27, 2011 | 07:39 PM
  #1  
newbie2vette's Avatar
newbie2vette
Thread Starter
Burning Brakes
 
Joined: Sep 2010
Posts: 799
Likes: 26
From: Lexington Park Maryland
Default Turbo 350 trans

I am helping a freind with her 1979 with L82/automatic trans. It does not want to shift as it should, in order to drive it I manually shift to low and work my way to the final drive in order to drive without feeling like it is still in first or second.

I looked around the transmission, I remembered this trans have a vacuum modulator to assist with shifting properly. I found it at the end of the trans, but the hose was disconnected. I hooked it back up, it still does not shift properly. Can someone assist me where it should be connected on the carburator. She had a re-built carb put in (quadro jet). The quality of the work done to her car I question if the vacuum line for the trans is in the proper vacuum port on the carb. Thanks in advance.
Reply
Old Nov 27, 2011 | 07:43 PM
  #2  
Ganey's Avatar
Ganey
Race Director
10 Year Member
 
Joined: Apr 1999
Posts: 11,520
Likes: 13
From: CORVETTE 77 385 C.I. TEXAS
Default

It was connected to the intake vacuum, there is a 'tree' at back pass. side of intake.
Reply
Old Nov 27, 2011 | 08:07 PM
  #3  
newbie2vette's Avatar
newbie2vette
Thread Starter
Burning Brakes
 
Joined: Sep 2010
Posts: 799
Likes: 26
From: Lexington Park Maryland
Default

any chance you have a photo of this fitting? The only "tree" I saw back of the intake is where the vacuum line for the head lights and among other line. One side of the fitting is capped off. The vacuum line for the trans, is it a constant vacuum?
Reply
Old Nov 27, 2011 | 08:31 PM
  #4  
1Fordman's Avatar
1Fordman
Drifting
15 Year Member
 
Joined: Oct 2007
Posts: 1,317
Likes: 22
From: Marina CA
Default

Trans modulators hook up to a constant vacuum source.
Reply
Old Nov 27, 2011 | 08:33 PM
  #5  
DRIVESHAFT's Avatar
DRIVESHAFT
Drifting
20 Year Member
 
Joined: Aug 2005
Posts: 1,682
Likes: 3
From: League City TX
Default

Originally Posted by newbie2vette
The vacuum line for the trans, is it a constant vacuum?
Yes, it needs to be full time manifold vacuum.
Unless its been altered, your vacuum modulator line will be a metal tube except for a short length of vacuum hose on both ends.
Reply
Old Nov 28, 2011 | 05:28 PM
  #6  
newbie2vette's Avatar
newbie2vette
Thread Starter
Burning Brakes
 
Joined: Sep 2010
Posts: 799
Likes: 26
From: Lexington Park Maryland
Default

Originally Posted by DRIVESHAFT
Yes, it needs to be full time manifold vacuum.
Unless its been altered, your vacuum modulator line will be a metal tube except for a short length of vacuum hose on both ends.

Thank You everyone for your help, you just saved my friend some $$. I did find the "T" fitting behind the carb with one of the port capped off. Yes the vacuum was majority a steel tubing with several inches of vacuum tube on each end. I hooked it to the port with the cap on it, took it for a drive. It shifted smooth. Again thank you and my friend thanks you.

Ben
Reply

Get notified of new replies

To Turbo 350 trans





All times are GMT -4. The time now is 12:26 AM.

story-0
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-1
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-2
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-3
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE