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

th400 problem, need help fast please

Thread Tools
 
Search this Thread
 
Old Sep 24, 2009 | 01:04 PM
  #1  
pozesd99''s Avatar
Thread Starter
TECH Fanatic
iTrader: (3)
 
Joined: Dec 2007
Posts: 1,541
Likes: 0
Default th400 problem, need help fast please

ok so i just did a new build on the car and installed a th400 built by tci that i bought locally from someone selling it.
i finally got around to hooking up the shifter and something doesn't seem right.
so i take it out for a test drive...
thing thats wierd is that this is the gear sequence
park
neutral
reverse
neutral
first
second
no third...
so i wake up this morning and decide to adjust the shifter cable.
so i do that and everything seems to be good except for the fact that i have to shifter my shifter twice to get it to second gear...
and after a few minutes of driving the tranny makes almost a grinding sound for almost 2 seconds and then its back to normal...
does this randomly when i put it in reverse and third sometimes....
btw shifter is a b&m pro rachet shifter...
tranny is a rmvb th400
anyone have any ideas or experience with this?
need help fast please....
this is driving me crazy.
Reply
Old Sep 24, 2009 | 01:17 PM
  #2  
NicD's Avatar
7 Second Club
20 Year Member
Photogenic
Liked
Loved
iTrader: (7)
 
Joined: Nov 2001
Posts: 3,169
Likes: 689
From: Chandler, AZ
Default

Are you using a shifter made for a th400 RMVB? Many shifters require a different "plate" for the different shifting pattern compared to a regular shift pattern transmission.
Reply
Old Sep 24, 2009 | 01:23 PM
  #3  
pozesd99''s Avatar
Thread Starter
TECH Fanatic
iTrader: (3)
 
Joined: Dec 2007
Posts: 1,541
Likes: 0
Default

yes on the box it states its for a th400... i mean everything shifts fine. i believe i can fix the 2nd by adjusting the cable, trial and error. but its the sound im questioning and thats driving me nuts lol
Reply
Old Sep 24, 2009 | 01:42 PM
  #4  
NicD's Avatar
7 Second Club
20 Year Member
Photogenic
Liked
Loved
iTrader: (7)
 
Joined: Nov 2001
Posts: 3,169
Likes: 689
From: Chandler, AZ
Default

Originally Posted by pozesd99'
yes on the box it states its for a th400... i mean everything shifts fine. i believe i can fix the 2nd by adjusting the cable, trial and error. but its the sound im questioning and thats driving me nuts lol
I'm not super familiar with ratchet shifters because they drive me nuts but there is a difference between a standard TH400 and a RMVB TH400 and I would guess that there is a different shifting pattern for the ratcheting mechanism. Not sure if that would be affecting it being fully in gear on the shift or not. I know if a shifter is misadjusted it can cause issues similar to what you are having as well.
Reply
Old Sep 24, 2009 | 04:55 PM
  #5  
forcd ind's Avatar
TECH Veteran
15 Year Member
Liked
Loved
Community Favorite
iTrader: (7)
 
Joined: Sep 2007
Posts: 4,188
Likes: 292
From: woodbine, md
Default

heres your problem-the B&M rachet shifter makes 2 moves of the stick from park to rev-its this way because its a univ. shifter, and i believe when used on a mopar it works normal
so, if your in park, rachet it twice, now your in rev, then neu, 1,2,3
doesnt matter if rev pattern or not-it has to have a pin in it if used for a 3 sp(that way from fact.), pin rem if 4 spd-also very imporant, is how the shifter cable is hooked to the shifter itself-the bracket can go outside/inside the frame-as i remember the proper location is the piece on the cable that bolts to the shifter goes on the outside, but i would have to ck the instructions-if its installed the other way, it will never work right
READ the instructions, front to back-i have installed a bunch of them, they gotta be right-i even switched one to 4 sp when i installed the 4l80e, works perfect-best shifter on the market
place the shifter in park, adj the cable-move it to first, should be real close, tweak if needed
also, when going from rev to park, 2 clicks, just like coming from park to rev
Reply
Old Sep 24, 2009 | 08:25 PM
  #6  
pozesd99''s Avatar
Thread Starter
TECH Fanatic
iTrader: (3)
 
Joined: Dec 2007
Posts: 1,541
Likes: 0
Default

so i put a little more fluid in and it does still make the sound but much less
Reply




All times are GMT -5. The time now is 07:43 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