CLNK from transmission when slowing DOWN

325

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

12,385

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.
18,790

Maybe a bad motor or transmission mount.

1 of 1 people found this helpful.
325

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

18,790

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

Add photo

Related Questions

Thunderbird

Looking for a Used Thunderbird in your area?

CarGurus has 1,072 nationwide Thunderbird listings starting at $5,991.

ZIP:

Search Ford Thunderbird Questions

Ford Thunderbird Experts

#1 Larry Sturgis
Larry Sturgis
Reputation 1,580
#2 Tom Demyan
Tom Demyan
Reputation 1,520
#3 tennisshoes
tennisshoes
Reputation 1,220
View All

Related Models For Sale

Used Ford Mustang
543 Great Deals out of 45,840 listings starting at $1,999
Used Chevrolet Corvette
149 Great Deals out of 20,682 listings starting at $3,995
Used Mercedes-Benz SL-Class
45 Great Deals out of 2,814 listings starting at $4,530

Used Cars For Sale

2005 Ford Thunderbird For Sale
70 listings starting at $9,885
2004 Ford Thunderbird For Sale
7 Great Deals out of 145 listings starting at $7,485
2003 Ford Thunderbird For Sale
6 Great Deals out of 156 listings starting at $9,500
2002 Ford Thunderbird For Sale
7 Great Deals out of 360 listings starting at $5,991

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.