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Tranny Or Torque Converter?

  • Thread starter Thread starter Nathaniel Donnelly
  • Start date Start date Feb 27, 2017
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    c-4 c4 transmission torque converter

Nathaniel Donnelly

Member
Feb 9, 2016
39
3
18
San Diego
Feb 27, 2017
#1
  • Feb 27, 2017
  • #1
Hi all!

'67 convertible with 289

I've had a chronic issue with either my transmission (C-4) or torque converter. Everything works just fine when cold or during light use. However, if I'm accelerating up a long hill when warm, I sometimes get a "FFFFT, FFFFT!" sound accompanied by a slipping sensation.

I'm not too familiar with transmissions, but it seems opposite of "morning sickness" of old seals. Unfortunately, I don't know the history of the transmission other than "it had been recently serviced" before I bought it a couple years ago.

Any input from you smart guys out there? Thanks!
 

her69fastback

Member
Jan 9, 2017
19
3
13
Feb 27, 2017
#2
  • Feb 27, 2017
  • #2
Nathaniel Donnelly said:
Hi all!

'67 convertible with 289

I've had a chronic issue with either my transmission (C-4) or torque converter. Everything works just fine when cold or during light use. However, if I'm accelerating up a long hill when warm, I sometimes get a "FFFFT, FFFFT!" sound accompanied by a slipping sensation.

I'm not too familiar with transmissions, but it seems opposite of "morning sickness" of old seals. Unfortunately, I don't know the history of the transmission other than "it had been recently serviced" before I bought it a couple years ago.

Any input from you smart guys out there? Thanks!
Click to expand...
Not a expert but I would say it need to be rebuilt. If it's slipping that's not good
 
Reactions: Nathaniel Donnelly

Nathaniel Donnelly

Member
Feb 9, 2016
39
3
18
San Diego
Mar 8, 2017
#3
  • Mar 8, 2017
  • #3
her69fastback said:
Not a expert but I would say it need to be rebuilt. If it's slipping that's not good
Click to expand...

I was afraid of that. Would it be cheaper to just buy a new C4 from Summit for $1500 and swap it out?
 

her69fastback

Member
Jan 9, 2017
19
3
13
Mar 9, 2017
#4
  • Mar 9, 2017
  • #4
You should be able to get yours rebuilt for less then that. Call some transmission shops
 

Stang_1973

Founding Member
Jul 13, 2001
565
9
38
San Antonio, Tx.
Mar 13, 2017
#5
  • Mar 13, 2017
  • #5
most tranny places ive seen here charge about $700-1000 to do a drop, rebuild, and reinstall on these older trannies, parts included.
 
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