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

TH400 low sprag

Thread Tools
 
Search this Thread
 
Old Mar 20, 2007 | 11:31 PM
  #1  
8a8mfh's Avatar
Thread Starter
Banned
iTrader: (3)
 
Joined: Feb 2006
Posts: 1,943
Likes: 0
Default TH400 low sprag

Is there anything to be said about using a low sprag instead of a low roller in a th400?
I have the low sprag in my nova, but was wondering why they only used it in '64-'65.
The gearset has been rebuilt before the trans was built.
Reply
Old Mar 21, 2007 | 11:32 AM
  #2  
8a8mfh's Avatar
Thread Starter
Banned
iTrader: (3)
 
Joined: Feb 2006
Posts: 1,943
Likes: 0
Default

Anyone know what I'm talking about?
Is a LOW sprag better than a low roller?
Reply
Old Mar 21, 2007 | 05:09 PM
  #3  
8a8mfh's Avatar
Thread Starter
Banned
iTrader: (3)
 
Joined: Feb 2006
Posts: 1,943
Likes: 0
Default

Reply
Old Mar 21, 2007 | 09:53 PM
  #4  
PBA's Avatar
PBA
TECH Resident
20 Year Member
 
Joined: May 2006
Posts: 969
Likes: 119
Default

Even when they went to a roller assembly, this was never a weak point. Run what you have.
Reply
Old Mar 21, 2007 | 10:44 PM
  #5  
8a8mfh's Avatar
Thread Starter
Banned
iTrader: (3)
 
Joined: Feb 2006
Posts: 1,943
Likes: 0
Default

Thanks.
Reply
Old Mar 22, 2007 | 06:37 AM
  #6  
FLT's Avatar
FLT
FormerVendor
iTrader: (1)
 
Joined: Sep 2005
Posts: 6,620
Likes: 4
From: Wood Dale, Illinois
Default

I would have to agree with Dayna on this one. To be honest with you I never heard of a low sprag in this application until you posted. Thanks for the history lesson. Vince
Reply
Old Mar 22, 2007 | 06:53 AM
  #7  
8a8mfh's Avatar
Thread Starter
Banned
iTrader: (3)
 
Joined: Feb 2006
Posts: 1,943
Likes: 0
Default

I can post pics of a spare sprag on the center support but the only gearset I have that uses a sprag is in the car. It's smooth on the inside instead of ramped.
Reply
Old Mar 22, 2007 | 07:10 AM
  #8  
FLT's Avatar
FLT
FormerVendor
iTrader: (1)
 
Joined: Sep 2005
Posts: 6,620
Likes: 4
From: Wood Dale, Illinois
Default

That's cool. I have a pretty good idea of what it looks like. I just have never built one with it. Maybe you should sell those parts on eBay for some coin!
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
Old Mar 22, 2007 | 07:12 PM
  #9  
8a8mfh's Avatar
Thread Starter
Banned
iTrader: (3)
 
Joined: Feb 2006
Posts: 1,943
Likes: 0
Default

Maybe you should sell those parts on eBay for some coin!
I could have, I got a bunch of stuff from an old hardparts supplier. He had xx of hours to empty the old shop, they were taking big u haul trucks full of parts 1/2 mile down the road to the scrap metal place, getting $3000+ a truck (according to him).
He let me take a good chunk of stuff, for some reason there were th400 parts covering the floor of a 1500 sq ft room, all lined up, no cases to be seen. I ended up with some new pumps, new 4L80E direct drums and old sprag type too. Also a box of about 100+ new sun gears and sun gear shafts. and some other stuff. I got a bunch of stuff. I only left because I wore myself out carrying it all.
Reply




All times are GMT -5. The time now is 03:13 AM.

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