C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

Th350

Thread Tools
 
Search this Thread
 
Old Sep 14, 2006 | 12:04 AM
  #1  
justaguy10825's Avatar
justaguy10825
Thread Starter
Instructor
10 Year Member
 
Joined: Sep 2006
Posts: 211
Likes: 0
From: Searcy Arkansas
Default Th350

Anyone know what a good price on a rebuilt trans for the 1978 anniversary edition would be? The one I have needs a diaper! I'm in So Cal.. Any suggestion on place to buy would also be usefull. THANKS!
Reply
Old Sep 14, 2006 | 12:52 AM
  #2  
CA-Legal-Vette's Avatar
CA-Legal-Vette
Race Director
20 Year Member
All Eyes On Me
Loved
Community Favorite
 
Joined: Jul 2004
Posts: 12,686
Likes: 329
From: Scottsdale Arizona
Default

Do you know where it's leaking from? Is the tranny working fine otherwise? I just went through this on my 81 and between the removal and the masive oil change, I damaged some of the internals.

Most of the external seals can be changed in place. If all that you're trying to do is stem the leaks, you may be able to avoid a rebuild.

Just to answer your original question, a rebuild will likely run you around $1100.
Reply
Old Sep 14, 2006 | 04:06 PM
  #3  
MN81C3's Avatar
MN81C3
Instructor
 
Joined: Aug 2006
Posts: 134
Likes: 0
From: Apple Valley MN
Default

I have also had a problem with leaks on my 81 to the point i picked one of those drip pans. First it was the Shift Linkage seal on the passenger side. Replaced that now it the speedo cable is leaking on the drivers side. I plan to replace that one next week. I would suggest getting under and hosing of the tran as best you can and try to determine where the leak is coming from. A rebuild is expensive. I had a local mech change the first one for less that $60. I suspect the speedo may be a little more.
Reply
Old Sep 14, 2006 | 04:30 PM
  #4  
CA-Legal-Vette's Avatar
CA-Legal-Vette
Race Director
20 Year Member
All Eyes On Me
Loved
Community Favorite
 
Joined: Jul 2004
Posts: 12,686
Likes: 329
From: Scottsdale Arizona
Default

Originally Posted by MN81C3

I suspect the speedo may be a little more.
The speedo is actually pretty easy. You have to unscrew the speedo cable first. You'll find a retainer bolt on the side of the cable hookup that you need to undo. The housing will then pull out. There is an o-ring inside that is probably the cause of the leak. It's also possible that the speedo drive gear is worn out and the leak is there. Doc Rebuild and Ecklers has these if it needs to be replaced.

Pretty simple.
Reply
Old Sep 14, 2006 | 04:58 PM
  #5  
texbeasr3's Avatar
texbeasr3
Instructor
10 Year Member
 
Joined: Jun 2006
Posts: 104
Likes: 0
From: Missouri City Texas
Default

My '78 TH350 was leaking so bad, I gave up and let a shop upgrade and fix the leaks. Cost about $1000 with hi-stall convertor. Had to take back 3 time for seal leaks in the front, back and shifter. One time they broke the pressure line to the radiator...what a mess. At this point I still have slow leak out of the shifter. Oil drip pan and newspaper.... change news paper once a month.
Reply
Old Sep 14, 2006 | 05:26 PM
  #6  
rcastor426's Avatar
rcastor426
Racer
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Feb 2004
Posts: 360
Likes: 1
From: Meridian, MS
Default

Originally Posted by CA-Legal-Vette
Do you know where it's leaking from? Is the tranny working fine otherwise? I just went through this on my 81 and between the removal and the masive oil change, I damaged some of the internals.

Most of the external seals can be changed in place. If all that you're trying to do is stem the leaks, you may be able to avoid a rebuild.

Just to answer your original question, a rebuild will likely run you around $1100.
1100 Seems like a price to drop off your car and have them do it. i have had 3 th350's rebuilt, and a th400 and with shift kit, all good parts and a 3000 stall converter the most i ever spent was $850. but i also always pulled the transmissions myself and dropped them off.
Reply
Old Sep 14, 2006 | 07:22 PM
  #7  
NC C3's Avatar
NC C3
Burning Brakes
10 Year Member
 
Joined: Jul 2004
Posts: 1,235
Likes: 0
From: Sick of these TOOLS & AZZHATS in DC
Default

I put a Hughes TH350 and a Hughes HD2500 stall TC in my '78 about a year ago and haven't looked back. I LOVE that tranny. I spent about 1500 bucks but that included everything....trans, TC, secondary cooler, etc.
Bought everything through Summit
Reply

Get notified of new replies

To Th350





All times are GMT -4. The time now is 01:58 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