CLNK from transmission when slowing DOWN

335

Asked by Jul 10, 2016 at 09:13 AM about the 1963 Ford Thunderbird

Question type: Maintenance & Repair

I'm aware of the usual CLUNK when you put the car IN gear if the motor speed is too high. The problem I have is that when coming to say a junction, I slow down to say 20mph and then the transmission CLUNKS as it goes OUT of gear almost as though its letting go or something. I assume that the vacuum will at that point be low, could that effect it ?and, if so, what do I look for or adjust etc, Ford 390 automatic transmission slow running speed about 560 ( I cant get it any lower)
thanks in anticipation of suggestions,
Neil Willis

4 Answers

13,175

Sounds like drive line slack as in Universal joints.. you can adjust the transmission modulator small screw in the vacuum line barb controls upshift and downshift speed based on vacuum. But this has nothing to do with the clunk in the driveline.

1 of 1 people found this helpful.
Best Answer Mark helpful
19,980

Maybe a bad motor or transmission mount.

1 of 1 people found this helpful.
335

Thanks Auto_centic and fireird338 The universal joints are both new, the modulator is new ( although I didn't understand the note about "barb controls" The CLUNK seems to be from the transmission when slowing down as though it CAN@T let go of the drive All motor mounts and transmission mounts are new just this CLINGING to the gears as if it doesn't want to let go, then CLUNK and it lets go??? Thanks guys

19,980

Check the bolts holding the flywheel to the torque converter they maybe coming loose also may want to check the transmission to engine bolts making sure they are tight.

1 of 1 people found this helpful.

Your Answer

Thunderbird

Looking for a Used Thunderbird in your area?

CarGurus has 1,063 nationwide Thunderbird listings starting at $5,000.

ZIP:

Ford Thunderbird Experts

  • #1
    Larry Sturgis
    Reputation
    1,650
  • #2
    Tom Demyan
    Reputation
    1,580
  • #3
    tennisshoes
    Reputation
    1,270
View All

Related Models For Sale

Used Ford Mustang
593 Great Deals out of 36,129 listings starting at $1,800
Used Chevrolet Corvette
185 Great Deals out of 19,805 listings starting at $2,490
Used Mercedes-Benz SL-Class
66 Great Deals out of 2,997 listings starting at $4,500

Used Cars For Sale

2005 Ford Thunderbird For Sale
71 listings starting at $5,000
2004 Ford Thunderbird For Sale
127 listings starting at $7,211
2003 Ford Thunderbird For Sale
5 Great Deals out of 157 listings starting at $7,995
2002 Ford Thunderbird For Sale
13 Great Deals out of 345 listings starting at $6,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.