66' Drive shaft hits floor board - Chevelle Tech
Transmission & Driveline Transmissions and Differentials

 10Likes
  • 3 Post By 72soft-top
  • 1 Post By OO52
  • 1 Post By Billdini
  • 1 Post By SSJohn
  • 2 Post By oldcutlass
  • 1 Post By 68-13427
  • 1 Post By Kirk's67SS
 
LinkBack Thread Tools Search this Thread Display Modes
post #1 of 11 (permalink) Old Jul 15th, 19, 1:43 AM Thread Starter
canosoup
 
Join Date: Jul 2019
Location: Burbank, CA
Posts: 8
Garage
Question 66' Drive shaft hits floor board

Our 66' Chevelle drive shaft hits the floor board when we slow while applying brake pressure.
Upon inspection the drive shaft sits ⅛" from the floor board and the trans mount needs to be replaced. Anyone know if a lower profile transmission mount would lower the drive shaft and where to purchase one? Thanks for the help.
Attached Thumbnails
Click image for larger version

Name:	IMG_0921.jpg
Views:	27
Size:	75.2 KB
ID:	598280   Click image for larger version

Name:	IMG_0922.jpg
Views:	36
Size:	60.2 KB
ID:	598282   Click image for larger version

Name:	IMG_0923.jpg
Views:	28
Size:	95.7 KB
ID:	598284  

Soup66ChevelleMalibu
Mike Campbell is offline  
Sponsored Links
Advertisement
 
post #2 of 11 (permalink) Old Jul 15th, 19, 7:39 AM
Lifetime Premium Member
Brian
 
Join Date: Apr 2000
Location: Holland, PA
Posts: 1,136
Two thoughts come to mind:
1. The body bushings May need to be replaced?
2. Possible to get a thinner transmission bushing?
David Bates, LeoP and BTK like this.

Team Chevelle Member (19 years and counting...
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
)

'72 Chevelle Convertible (Mohave Gold) (all SS options, no SS badging)
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


2004 Pontiac GTO (Quicksilver) RIP April 2013
--> Replaced with 2004 Pontiac GTO (Barbados Blue)

2003 Chevrolet Avalanche (Sunset Orange Metallic)
72soft-top is offline  
post #3 of 11 (permalink) Old Jul 15th, 19, 10:03 AM
Lifetime Premium Member
Ed
 
Join Date: Nov 2012
Location: San Diego
Posts: 900
Garage
Re: 66' Drive shaft hits floor board

Found this trans mount at Rock Auto. Not as tall as the usual Chevy mounts.
IIRC it was about 1/4" shorter.
Attached Thumbnails
Click image for larger version

Name:	fullsizeoutput_15ab.jpg
Views:	8
Size:	120.1 KB
ID:	598286  
Mike Campbell likes this.

Ed

70 El Camino SS 396
68 GTO (Thanks Mom)
06 Silverado
07 SRX
OO52 is offline  
 
post #4 of 11 (permalink) Old Jul 15th, 19, 10:36 AM
Team Member
Bill
 
Join Date: Jan 2018
Posts: 368
Re: 66' Drive shaft hits floor board

That's a pretty sharp angle where the driveshaft is going into the tranny so I don't think it has anything to do with body bushings or body height. It might make it worse but not the cause. I would check the front motor mounts as well but something is not the correct part for sure and that could include the cross member. See if someone can take some measurements and pics.
Mike Campbell likes this.
Billdini is offline  
post #5 of 11 (permalink) Old Jul 15th, 19, 3:29 PM
Tech Team
John
 
Join Date: Dec 2012
Location: 55.916, 10.733
Posts: 496
Re: 66' Drive shaft hits floor board

If you get a shorter trans mount be sure and check rad fan clearance with the shroud. 1/4 lower on the tail might raise the fan too much.
Mike Campbell likes this.
SSJohn is offline  
post #6 of 11 (permalink) Old Jul 15th, 19, 4:32 PM
Senior Tech Team
Eric
 
Join Date: Aug 2011
Location: Poteau, Ok
Posts: 4,108
Re: 66' Drive shaft hits floor board

Your also missing a bolt. Have your checked your Ujoints?
boyd66k20 and Mike Campbell like this.

Your just jealous because you can't hear the voices!

1967 Olds Cutlass 468 BBC/T400
1963 Plymouth Fury 440/Torqueflite
2007 Ford Mustang GT (momma's car)
oldcutlass is online now  
post #7 of 11 (permalink) Old Jul 15th, 19, 7:23 PM Thread Starter
canosoup
 
Join Date: Jul 2019
Location: Burbank, CA
Posts: 8
Garage
Re: 66' Drive shaft hits floor board

Checked the body bushings and they look good, looking/ordering at lower profile mounts now. Going to check the engine mounts and U joints tonight. Fan Awareness on my mind. Thanks All, ill post my progress.

Soup66ChevelleMalibu
Mike Campbell is offline  
post #8 of 11 (permalink) Old Jul 15th, 19, 7:28 PM Thread Starter
canosoup
 
Join Date: Jul 2019
Location: Burbank, CA
Posts: 8
Garage
Re: 66' Drive shaft hits floor board

Quote:
Originally Posted by oldcutlass View Post
Your also missing a bolt. Have your checked your Ujoints?
There is one bolt where the hole threads are stripped so defiantly ordering a new mount.

Soup66ChevelleMalibu
Mike Campbell is offline  
post #9 of 11 (permalink) Old Jul 15th, 19, 10:35 PM
Lifetime Premium Member
Terry
 
Join Date: Dec 2014
Location: Sacramento, Ca.
Posts: 814
Re: 66' Drive shaft hits floor board

Threads are in the tail shaft housing, not the mount. Terry
Mike Campbell likes this.
68-13427 is offline  
post #10 of 11 (permalink) Old Jul 16th, 19, 12:37 PM
Senior Tech Team
Greg.
 
Join Date: Apr 2011
Location: Ottawa, On, Canada
Posts: 4,659
Garage
Re: 66' Drive shaft hits floor board

Mike when my DriveShaft/UJoint Nuckle was hitting the Floor of my car going over bumps/deps in the Hwy/Street
the old Speed Shop answer was to Bang/Dent the Floor Up

Went to another new Shop and they found that the Trans Tail Housing was Cracked on the Top where it could not be seen
and that the Driveshaft was a 1.5" to Long
and thus was dead hitting inside the Trans pushing the Slip Yolk/UJoint up into the Floor
after that stuff all got fixed and a Shorter Cross Member/Trans Mount replaced tha old higher one
they also had to adjusted the Pinion Angle, which was easy to do since I had UMI Perf great Adjustable Rear Upper Control Arms
Mike Campbell likes this.

67 Chevelle Malibu SS Cdn
Born 283 / PG / A51
468/TH400 2,500 stall/ S60 3.70 Gs
Prev Best on M/T ET S/S #3454 street Tires/Dress 2018/05/20
60' = 1.664
1/8 = 7.532 et / 91 mph
1/4 = 11.814 et / 115 mph
NEW Best with 3,500+ Stall TC 2019/06/23
60' = 1.561
1/8 = 7.411 et / 90.18 mph
1/4 = ??.??? et / ??? mph


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Kirk's67SS is offline  
post #11 of 11 (permalink) Old Today, 3:02 AM Thread Starter
canosoup
 
Join Date: Jul 2019
Location: Burbank, CA
Posts: 8
Garage
Re: 66' Drive shaft hits floor board

Thanks to all the helpful replies, have not got around to putting it on a lift yet but we will keep you posted on the findings with all the helpful tips!

Soup66ChevelleMalibu
Mike Campbell is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevelle Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address. Note, you will be sent a confirmation request to this address.

Email Address:
OR

Log-in










Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome