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

Installed a Yank, but what's wrong?

Thread Tools
 
Search this Thread
 
Old Feb 15, 2008 | 09:27 PM
  #1  
Primered's Avatar
Thread Starter
Staging Lane
iTrader: (2)
 
Joined: Jan 2006
Posts: 78
Likes: 0
From: Bedford, TX
Default Installed a Yank, but what's wrong?

Just got done installing a yank 4k for a th350, it feels extremely loose like I expected. But when I hit on the hwy where it won't spin, it revs right to 6500 but pulls but I don't see the tach move again, so I hit the rev limiter of course. Pulling back up to the house I come around a corner and it almost felt like the tranny slipped and then was fine. Any ideas what to check for?

Thanks
Reply
Old Feb 15, 2008 | 09:39 PM
  #2  
performabuilt's Avatar
LS1Tech Sponsor
15 Year Member
Liked
Loved
Community Favorite
iTrader: (25)
 
Joined: Aug 2006
Posts: 10,854
Likes: 80
From: BLOOMSBURG PA
Default

I would suggest adding some fluid , Sounds like your still a little low.
__________________
Built..PerformaBuilt..Tough

Call 888-744-6542


Reply
Old Feb 16, 2008 | 11:31 AM
  #3  
Primered's Avatar
Thread Starter
Staging Lane
iTrader: (2)
 
Joined: Jan 2006
Posts: 78
Likes: 0
From: Bedford, TX
Default

Fluid level good, what else?
Reply
Old Feb 16, 2008 | 12:22 PM
  #4  
Sicko's Avatar
TECH Regular
iTrader: (1)
 
Joined: Feb 2008
Posts: 442
Likes: 0
From: Minnesota
Default

Did you have it tuned?
Reply
Old Feb 16, 2008 | 01:04 PM
  #5  
Primered's Avatar
Thread Starter
Staging Lane
iTrader: (2)
 
Joined: Jan 2006
Posts: 78
Likes: 0
From: Bedford, TX
Default

Car was previously tuned with the 4l60e, the th350 is a full reverse manual valvebody with a tbrake.
Reply
Old Feb 16, 2008 | 01:15 PM
  #6  
Black X's Avatar
8 Second Club
15 Year Member
iTrader: (9)
 
Joined: Aug 2005
Posts: 558
Likes: 1
From: CANADA!
Default

Not to sound like a broken record but did you double and tripple check your fluid?? New converters will "burp" sometimes. ?
Reply
Old Feb 16, 2008 | 01:24 PM
  #7  
Primered's Avatar
Thread Starter
Staging Lane
iTrader: (2)
 
Joined: Jan 2006
Posts: 78
Likes: 0
From: Bedford, TX
Default

I will double check again, I hope that's the case and try an autometer tach just to make sure it's all good. Thanks for the help guys.
Reply
Old Feb 16, 2008 | 04:39 PM
  #8  
Yank's Avatar
FormerVendor
iTrader: (181)
 
Joined: Oct 2003
Posts: 2,293
Likes: 1
From: Alma, Ar.
Default

When you install a TH350 in an F-body the dipstick will read incorrectly as to the angle of the trans the f-body engine is set up to have the crankshaft level and the orginal use of the TH350 was at a 5 deg downward angle so do not count on the dipstick for correct reading
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 Feb 17, 2008 | 01:12 PM
  #9  
fastGBcamaro's Avatar
TECH Regular
iTrader: (10)
 
Joined: Jan 2004
Posts: 440
Likes: 0
From: Green Bay, WI
Default

Originally Posted by Yank
When you install a TH350 in an F-body the dipstick will read incorrectly as to the angle of the trans the f-body engine is set up to have the crankshaft level and the orginal use of the TH350 was at a 5 deg downward angle so do not count on the dipstick for correct reading
Great post, and very helpful info. I just bought a Yank 4000 stall for my th400 install, will I have the same issue, or is the th400 designed to sit more level like the f-body?
Reply
Old Feb 17, 2008 | 02:32 PM
  #10  
Yank's Avatar
FormerVendor
iTrader: (181)
 
Joined: Oct 2003
Posts: 2,293
Likes: 1
From: Alma, Ar.
Default

Originally Posted by fastGBcamaro
Great post, and very helpful info. I just bought a Yank 4000 stall for my th400 install, will I have the same issue, or is the th400 designed to sit more level like the f-body?
On the Th 350 and Th400 the fill line will be the parting surface between the pan and case when the trans pan gasket area sets level to the ground, your fill mark on dipstick would be correct at this point and can be marked for future readings
Reply
Old Feb 17, 2008 | 07:00 PM
  #11  
Primered's Avatar
Thread Starter
Staging Lane
iTrader: (2)
 
Joined: Jan 2006
Posts: 78
Likes: 0
From: Bedford, TX
Default

Ok fluid looks and smells fine, level is good, hooked up the tach, shoots to 6k whenever I go full throttle. I'm not sure what else to check for other than something is wrong with the converter, trans was fine before with tight nitrous stall.
Reply
Old Feb 19, 2008 | 09:25 AM
  #12  
Ragtop 99's Avatar
TECH Senior Member
iTrader: (7)
 
Joined: Nov 2001
Posts: 9,491
Likes: 1
From: Bethesda, MD
Default

What does it stall to on your T-Brake?

When you hit 6000 rpm does it hold that for a while, then pull on up to redline? Is this NA?

Maybe the converter came in higher stall than expected and you are pushing through it.
Reply
Old Feb 19, 2008 | 05:08 PM
  #13  
Yank's Avatar
FormerVendor
iTrader: (181)
 
Joined: Oct 2003
Posts: 2,293
Likes: 1
From: Alma, Ar.
Default

Thanks for the call and we look foward to helping you with your problem.
Reply




All times are GMT -5. The time now is 06:44 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