C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Auto trans problem

Thread Tools
 
Search this Thread
 
Old Sep 13, 2015 | 02:26 PM
  #1  
SteveandBen's Avatar
SteveandBen
Thread Starter
5th Gear
 
Joined: Dec 2013
Posts: 5
Likes: 0
Default Auto trans problem

Hi foilks, after not driving the Vette for a while (86 Z51) I took it out today and the trans was acting up. Slipping really bad in 2,3, and Drive but seems to work fine in OverDrive and Reverse. Any suggestions?

TIA
Reply
Old Sep 14, 2015 | 01:02 AM
  #2  
Cliff Harris's Avatar
Cliff Harris
Race Director
15 Year Member
 
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
Default

Drain and replace the fluid and replace the filter. If that doesn't solve your problems then take it to a trans shop.

I suggest a really dirty old place that's been there a million years vs. the shiny new place with high school kids rebuilding the transmissions.

To get a good performance transmission shop call TransGo Technical Support (they don't do support on their web site) and ask for a recommendation. They have a list of trans shops that know what they are doing.
Reply
Old Sep 14, 2015 | 08:08 AM
  #3  
confab's Avatar
confab
Melting Slicks
 
Joined: Nov 2013
Posts: 3,451
Likes: 336
From: Greater Cincinnati Area.
Default

That's a really strange condition. You mean the manual select 2/3/D ranges, but it's okay in the OD range?

There's a thing in there called a coast clutch, it gives your engine braking in the manual select ranges. (It also backs up the forward sprag) Sounds like a leak in the coast clutch circuit or a bad piston/lip seal.

Try what Cliff said and if that doesn't help? Leave it on OD till you can get it rebuilt.
Reply

Get notified of new replies

To Auto trans problem





All times are GMT -4. The time now is 10:07 PM.

story-0
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-1
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-2
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-3
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-4
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-5
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-6
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-7
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-8
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE
story-9
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE