Transmission has no TCC and No 4th (OD) gear! - GM Forum - Buick, Cadillac, Olds, GMC & Pontiac chat

Buick When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made.

Thread Tools Search this Thread
Old 09-27-2013, 10:09 PM   #1  
Senior Member
Posts like a Turbo
Thread Starter
Join Date: May 2005
Location: Fredericton, New Brunswick.
Posts: 380
Thanks: 0
Thanked 1 Time in 1 Post
Timothy's Buick is on a distinguished road
Default Transmission has no TCC and No 4th (OD) gear!

I have a code for a tcc problem, which I believe is 39.
In the morning, when it is nice and cool, when I start driving, the TCC comes on like it normally does at 60-70 kph, and when the car hits 80, 4th gear is engaged. It does seem to get lazy engaging, until 4-5 mins later, the TCC is gone all together. I do have 4th gear however...... For another 5 mins. Then it is gone, and when I am cruising at 100 kph, the engine revs anywheres from 2500-2800 rpms, instead of 1800. This is quite a waste of fuel.

The fluid is a little old, but still in good shape, and it shifts great, no slipping.

Using Identifix, someone says that 4th gear will be inhibited if the TCC does not work?

Sounds like I need to replace the TCC solonoid in the tranny? Its 50 bucks for one, plus a little labour on my part, lol. Question is, are there 2 solonoids in this tranny for the TCC? One to apply the TCC and a PWM to control line pressure?

Anyone ever have experience with this issue? Thanks
Timothy's Buick is offline   Reply With Quote
Old 09-29-2013, 04:20 AM   #2  
Senior Member

True Car Nut
Soft Ride's Avatar
Join Date: Jan 2012
Location: BC Canada
Posts: 3,821
Thanked 380 Times in 336 Posts
Soft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud of

I take it that since you are posting in Buick you are referring to your 93 Pk Ave?
Often the solenoids, valve body check balls etc...get gum & varnish build up, causing slipping or No lock up. Good transmission maintenance fluid & filter (once every 35k miles) goes a long ways in keeping transmissions healthy.
Before I would replace anything, I would put a full can of this into your transmission fluid, drive it for about 500 miles and see if it improves.
Trans Tune - Sea Foam Sales Company
There generally as far as I know are 2+ solenoids. I would want to refer to the FSM for your vehicle.
On my 4t65-e I used the Trans Tune, things got better fairly quickly, it was harsh shifting when hot only, and lessened once Trans Tune was in.
I then also installed a Transgo spring & spacer shift kit into the accumulator body accessible for the pan drop area, and replaced the filter and went to the best GM trans fluid Dexron VI (6) Nice stuff!
Soft Ride is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Transmission issue: no 4th or TCC lockup Hemicuda71 1992-1999 3 03-08-2011 06:15 PM
TCC problem p0742 tcc stuck in locked position San Juan Cruiser 2000-2005 8 10-20-2007 12:00 PM
FYI if you lose 4th gear / no fourth gear / no 4th gear caminated2k 2000-2005 6 07-24-2005 10:26 PM
Harsh upshift from 3rd to 4th gear int_53185 1992-1999 7 09-22-2004 10:41 PM
hesitation from 3rd to 4th gear ?? Drifter420 1992-1999 10 08-14-2002 07:24 PM

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

All times are GMT -4. The time now is 11:59 PM.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.