'77 auto trans question
Thread Starter
Team Owner
Joined: May 2001
Posts: 25,057
Likes: 1,265
From: Virginia
St. Jude Donor '11
'77 auto trans question
I just started to notice that rpms seem higher at all speeds. I'm guessing that the trans is slipping some..am I correct? And also when I nail it the tach goes way over fast...
.....for example..when I used to go 40mph the tach would read around 2000...now at 40mph it reads over 2500...sounds like a slipping transmission to me...?!?
Can the bands be adjusted or does it need a rebuild and what would be an average cost to rebuild the transmission...
Thanks for your help.....
Oh yea also I've had the vette since 1982 and it now has 125,000 original miles on it...runs perfect otherwise...
.....for example..when I used to go 40mph the tach would read around 2000...now at 40mph it reads over 2500...sounds like a slipping transmission to me...?!?
Can the bands be adjusted or does it need a rebuild and what would be an average cost to rebuild the transmission...
Thanks for your help.....
Oh yea also I've had the vette since 1982 and it now has 125,000 original miles on it...runs perfect otherwise...
Thread Starter
Team Owner
Joined: May 2001
Posts: 25,057
Likes: 1,265
From: Virginia
St. Jude Donor '11
Originally Posted by Schmucker
I'm sure it can be adjusted, but a good light performance rebuild on a TH350 is only a couple hundred bucks.
Any other opinions would be appreciated...I know there are more guys here with C3's that have good knowledge of what I need help with...Thanks again...
Race Director
Joined: Sep 2002
Posts: 10,362
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From: San Diego - Deep Within The State of CONFUSION!
Band adjustment? NO
That term was forgotten about in the sixties or early seventies and the last transmission that I know of that offered band adjustments was the Ford C4 used in Mustangs and Fairlanes.
The GM trans should not slip. It is not adjustable. Is it full of fluid? Have you ever serviced it since you had the car, all these years?
The GM trans should not slip. It is not adjustable. Is it full of fluid? Have you ever serviced it since you had the car, all these years?
Thread Starter
Team Owner
Joined: May 2001
Posts: 25,057
Likes: 1,265
From: Virginia
St. Jude Donor '11
Originally Posted by SanDiegoPaul
That term was forgotten about in the sixties or early seventies and the last transmission that I know of that offered band adjustments was the Ford C4 used in Mustangs and Fairlanes.
The GM trans should not slip. It is not adjustable. Is it full of fluid? Have you ever serviced it since you had the car, all these years?
The GM trans should not slip. It is not adjustable. Is it full of fluid? Have you ever serviced it since you had the car, all these years?
So I guess I just need a rebuild with new clutches and gaskets...surprised that no one else had an opinion...
Thread Starter
Team Owner
Joined: May 2001
Posts: 25,057
Likes: 1,265
From: Virginia
St. Jude Donor '11
Originally Posted by page62
Is your tach accurate? When it goes "way over" do you hear the corresponding engine revs?
This would be a GOOD time to put an overdrive transmission in there!
This would be a GOOD time to put an overdrive transmission in there!
Yes it has always been accurate and is still accurate...it flies over to 6-7000 rpm and the engine sounds like it also...but it goes there way too fast..so that to me means the trans is slipping...
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Intermediate
Joined: Jul 2004
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From: Rancho Santa Fe CA
i had my th350 rebuilt for about 200-300 i think, but a high performance rebuild. just look for the little shops, dealers jack prices real high. i learned about my guy from other guys who work on my car recommending... if u live near san diego or oceanside, i can tell u where he is.
Thread Starter
Team Owner
Joined: May 2001
Posts: 25,057
Likes: 1,265
From: Virginia
St. Jude Donor '11
Originally Posted by z3man987
i had my th350 rebuilt for about 200-300 i think, but a high performance rebuild. just look for the little shops, dealers jack prices real high. i learned about my guy from other guys who work on my car recommending... if u live near san diego or oceanside, i can tell u where he is.
...so I guess I will look here..and it may be my torque converter as somebody suggested...who knows...guess I will have to take it somewhere to find out..thanks for help and if anyone else wants to chime in I will be all ears and appreciative..thanks guys...
will do this week...thanks
