Bump when shifting
Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

+ Reply to Thread
Results 1 to 11 of 11
Like Tree2Likes
  • 1 Post By CWB
  • 1 Post By Jakerin
Cadillac STS-V Series Forum Discussion, Bump when shifting in Cadillac V-Series Forums; ...
  1. #1
    Jakerin's Avatar
    Jakerin is offline Cadillac Owners Fanatic
    Automobile(s): 2006 STS-V
    Join Date
    Jul 2016
    Location
    Coarsegold, CA.
    Posts
    470

    Bump when shifting

    I’m feeling and hearing more of a ‘bump’ when the tranny shifts than I should I think. It only happens when there is some slack in the driveline as when it shifts as I switch from S3 to D for example. Is there a bump stop built into the differential? Not just an external rubber stop but something built in?

  2. Remove Advertisements
    Cadillac Forums
    Advertisements
     

  3. #2
    baller95's Avatar
    baller95 is offline Cadillac Owners Connoisseur
    Automobile(s): 2007 Cadillac STS-V Black On Black
    Join Date
    Jun 2010
    Location
    Toronto, Canada
    Age
    28
    Posts
    1,427

    Re: Bump when shifting

    Do a transmission oil change and reflash your trans tune. Should help!

  4. #3
    CWB
    CWB is offline Cadillac Owners Fanatic
    Automobile(s): 08 STS 1SG HUD ACC F55 AWD, 08 STS 1SG Platinum HUD ACC F55 RWD
    Join Date
    Mar 2016
    Location
    Lower Alabama
    Age
    69
    Posts
    230

    Re: Bump when shifting

    Put it on a lift. With a pry bar, try to move the nose (front) of the differential up. If it moves much at all, you have found your problem. Replace the front diff. bushing with factory or aftermarket ie. Creative Steel bushing.
    Jakerin likes this.

  5. #4
    Jakerin's Avatar
    Jakerin is offline Cadillac Owners Fanatic
    Automobile(s): 2006 STS-V
    Join Date
    Jul 2016
    Location
    Coarsegold, CA.
    Posts
    470
    Thread Starter

    Re: Bump when shifting

    Dayum! Diff out and five hours labor!!! With 104,000 miles, anything else back there needed to be addressed? Still cheaper than car payments I guess.

  6. #5
    CWB
    CWB is offline Cadillac Owners Fanatic
    Automobile(s): 08 STS 1SG HUD ACC F55 AWD, 08 STS 1SG Platinum HUD ACC F55 RWD
    Join Date
    Mar 2016
    Location
    Lower Alabama
    Age
    69
    Posts
    230

    Re: Bump when shifting

    What problem did you find? The bushing problem does not require diff removal. Read up on this problem in this and the more populated STS forum. You will find some DIY writeups. Which replacement part you use affects the amount of disassembly required. Good Luck.

  7. #6
    Jakerin's Avatar
    Jakerin is offline Cadillac Owners Fanatic
    Automobile(s): 2006 STS-V
    Join Date
    Jul 2016
    Location
    Coarsegold, CA.
    Posts
    470
    Thread Starter

    Re: Bump when shifting

    Haven’t had a mechanic look at it yet but now I’m concerned about which part to order if that’s the problem, the harder longer lasting CS unit or the OEM piece. The OEM bushing lasted 13 years and 104,000 miles and apparently has done its job, so I wouldn’t want a replacement bushing to transmit more noise than the OEM bushing.

  8. #7
    Rboughne1's Avatar
    Rboughne1 is online now Cadillac Owners Enthusiast
    Automobile(s): '06 STS-V, '17 CTS-V
    Join Date
    Jul 2014
    Location
    PA-NJ line
    Posts
    765
    Quote Originally Posted by Jakerin View Post
    Haven’t had a mechanic look at it yet but now I’m concerned about which part to order if that’s the problem, the harder longer lasting CS unit or the OEM piece. The OEM bushing lasted 13 years and 104,000 miles and apparently has done its job, so I wouldn’t want a replacement bushing to transmit more noise than the OEM bushing.
    Nobody that went to the CS Urethane bushing complained about noise or vibration.

  9. #8
    mycaddy94 is offline Cadillac Owners Member
    Join Date
    Jul 2005
    Location
    Missoula, MT
    Age
    40
    Posts
    15

    Re: Bump when shifting

    check your motor mounts!! I just had a similar thing, my driver side mount was broken

  10. #9
    Jakerin's Avatar
    Jakerin is offline Cadillac Owners Fanatic
    Automobile(s): 2006 STS-V
    Join Date
    Jul 2016
    Location
    Coarsegold, CA.
    Posts
    470
    Thread Starter

    Re: Bump when shifting

    Kudos to Creative Steel. Ordered the bushing on Friday and it arrived Monday morning. $69.45 shipped. Decided on the dealer out of a dozen or so shops that weren’t interested, couldn’t or wouldn't do the job (and) the dealer got me in the morning after I called for an appointment. Spoke to the mechanic who wanted to see the bushing I brought, was impressed with it, had done the job before and had the necessary tool to boot! The labor estimate including new diff fluid was $895 and the total charged was $750. The old bushing was really shrunk. There were two one inch sections that I could see through to the other end. Thirteen years and 104,000+ miles really took their toll but now, the shifting, up or down is way better. More positive, no CLUNK from the rear on casual upshifts and downshifts are better too. Now, if I could only reach 25 mpg!
    carter's_sts likes this.

  11. #10
    Rboughne1's Avatar
    Rboughne1 is online now Cadillac Owners Enthusiast
    Automobile(s): '06 STS-V, '17 CTS-V
    Join Date
    Jul 2014
    Location
    PA-NJ line
    Posts
    765
    Now put in the Creative Steel motor mounts. Big difference. Not the solids, the urethane that give a bit. TIIIIIGHT.

  12. #11
    Jakerin's Avatar
    Jakerin is offline Cadillac Owners Fanatic
    Automobile(s): 2006 STS-V
    Join Date
    Jul 2016
    Location
    Coarsegold, CA.
    Posts
    470
    Thread Starter

    Re: Bump when shifting

    Quote Originally Posted by Rboughne1 View Post
    Now put in the Creative Steel motor mounts. Big difference. Not the solids, the urethane that give a bit. TIIIIIGHT.
    Since mine are ok, what difference would there be? The only motor mounts I ever broke were on my 66 SS396. Not as much hp but I’m sure it weighed about twice as much as the tiny Northstar weighs.

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

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

Please enter a valid email address for yourself.

What Cadillac(s) do you own? (Or type NONE)

Please select your insurance company (Optional)

Log-in

Similar Threads

  1. Question about shifting, trouble shifting, double clutching, etc...
    By Zhariak in forum 2009-2015 Cadillac CTS-V General Discussion
    Replies: 12
    Last Post: 09-11-12, 10:26 AM
  2. mounts? tranny? Bump when shifting to "D" and so forth
    By Liz's CTS in forum Cadillac CTS First Generation Forum - 2003 - 2007
    Replies: 2
    Last Post: 06-18-11, 06:55 PM
  3. Transmission Shifting Question - Trouble Down Shifting
    By JBCTSV in forum 2004-2007 Cadillac CTS-V General Discussion
    Replies: 2
    Last Post: 09-12-10, 09:41 AM
  4. pics of the new bump bump
    By Acqua7 in forum Cadillac CTS First Generation Forum - 2003 - 2007
    Replies: 6
    Last Post: 02-23-08, 01:50 PM
  5. Shifting "bump"? (currently test driving '98 SLS)
    By iametarq in forum Cadillac Seville / Cadillac Eldorado Forum
    Replies: 25
    Last Post: 02-02-05, 02:30 PM

Bookmarks

Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Read about Lincoln | Buick | Genesis | Kia Forte Forum