Automatic Transmission 2-Speed thru 10-Speed GM Autos | Converters | Shift Kits
Sponsored by:
Sponsored by:

th400 fittings

Thread Tools
 
Search this Thread
 
Old May 28, 2006 | 01:23 AM
  #1  
ls1408cp's Avatar
Thread Starter
10 Second Club
iTrader: (37)
 
Joined: Aug 2005
Posts: 1,778
Likes: 0
Default th400 fittings

I tried to put my 1/4npt fittings for the lines in the tranny and they only go in a thread or two then get tight. Is this normal? Even when I tightened them I maybe got three threads. thanks
Reply
Old May 28, 2006 | 03:02 PM
  #2  
DanZ28's Avatar
10 Second Club
iTrader: (5)
 
Joined: Nov 2001
Posts: 3,412
Likes: 0
From: Cali/Bay Area
Default

I know NPT fittings are supposed get tighter as you screw it in because they are tapered, yours sounds like it might be to tight though. Do a google search on what size hole for 1/4" NPT, I think it's 7/16" or .4735", and then make sure your tranny hole is the correct size. If you try to tighten it to much, you could crack your tranny case then your SOL, so be careful. Mine came from Rossler with 1/2 NPT to -6 AN FYI.

Dan
Reply
Old May 28, 2006 | 07:05 PM
  #3  
BIG BAD BLACKSS's Avatar
TECH Resident
iTrader: (4)
 
Joined: Sep 2005
Posts: 982
Likes: 1
From: Chicago
Default

You deffinatly have the wrong threads if your getting 2 turns and 3 when tight. Make sure you get the correct one and maybe look for a tap now since you may have fubbared up the threads already. Be careful as the other guy said you dont want to crack the case.
Reply
Old May 28, 2006 | 08:01 PM
  #4  
ls1408cp's Avatar
Thread Starter
10 Second Club
iTrader: (37)
 
Joined: Aug 2005
Posts: 1,778
Likes: 0
Default

thanks but I figured it out it was my own stupiedity.
Reply
Old May 29, 2006 | 06:07 PM
  #5  
DAPSUPRSLO's Avatar
TECH Fanatic
iTrader: (14)
 
Joined: Dec 2003
Posts: 1,729
Likes: 0
From: Salisbury,MD
Default

I got the madman cooler kit and noticed that my aero equip fittings only go in about two threads or so as well into the pipe fittings that have already been put in by transking in my th400. What would you guys suggest, does aero have different thread pitches or should I just pull out the pipe fittings that transking installed and go get some that will except the aero fittings? Thanks

On a side note, to those who got a madman cooler kit. did you guys get hose ends for the braided line with your kit, I recieved none. Thanks.
Reply
Old May 29, 2006 | 07:27 PM
  #6  
xssive's Avatar
TECH Addict
20 Year Member
iTrader: (123)
 
Joined: Nov 2001
Posts: 2,256
Likes: 2
From: Austin, TX
Default

On the tranny, there should be some fittings , and then the case itself. You need 1/4" npt on the case itself, remove the other fittings that are in there.
Reply
Old May 29, 2006 | 07:47 PM
  #7  
DAPSUPRSLO's Avatar
TECH Fanatic
iTrader: (14)
 
Joined: Dec 2003
Posts: 1,729
Likes: 0
From: Salisbury,MD
Default

Originally Posted by xssive
On the tranny, there should be some fittings , and then the case itself. You need 1/4" npt on the case itself, remove the other fittings that are in there.
Yep, that's what I was told by Madman, he also got me straight on my hose ends as well
Reply
Old May 29, 2006 | 08:00 PM
  #8  
ls1408cp's Avatar
Thread Starter
10 Second Club
iTrader: (37)
 
Joined: Aug 2005
Posts: 1,778
Likes: 0
Default

thats what i did
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo




All times are GMT -5. The time now is 02:34 PM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE