C-3 1975 Corvette 4 Speed rear wheels are locked up - Corvette Forum : DigitalCorvettes.com Corvette Forums
Go Back   Corvette Forum : DigitalCorvettes.com Corvette Forums > C3 Corvette Forums > C3 Corvette
Register Forums Garage Garage Mark Forums Read Auto EscrowInsurance Advertise


C3 Corvette
C3 Corvette General | Technical | Performance | Aftermarket | Discussions

Other sections:
Corvettes Classifieds
Corvette Detailing & Car Care
Corvette Audio/Video/Radar
General Automotive/Shop/Tools
Corvette Performance Driving/Racing

( Sponsored by: Zip Corvette Parts )

Custom Image Corvettes
A&A Corvette
Corvette tuner

Corvette aftermarket products


Parts & Products
Race Ramps
Melrose Motorsports
Parts Taxi
Pfadt Racing
Madvette Motorsports
Hi-tech Custom Concepts
Corvette Garage
Corvette Parts and Accessories
Corvette Car Care Products
Corvette HID

Bob Bondurant School of High Performance Driving
Corvette driving school

Cray Wheels

Thread Tools
Old 09-21-2019, 05:01 PM   #1
DC Crew
Posts: 1
Member #119433
Member since: Aug 2012
Location: Wetumpka, AL, USA

My Corvette(s)
2002 Corvette Convertible

Thanks: 0
Thanked 0 Times in 0 Posts
C-3 1975 Corvette 4 Speed rear wheels are locked up

Hey everyone was driving my 75 yesterday about mile into it the rear wheels just locked up. I was unable to even push the car to the side of the road. I was able to get it back home. I have been trying to figure out what is wrong. I took the caliber off and tried to turn it (nothing). Took the brake pads out from the other side still (nothing). There was nothing out of the ordinary only that it came to an immediate stop. I looked at the emergency brakes it appears to have lots of shoe left doesn't appear to be seized. The cable under there looks pretty bad and there is no emergency brake when you pull it up inside. I The Transmission was just rebuilt in it as well. I got into the car cranked it up and put it in gear hoping with no weight I would get something to move. Nothing it just boggs down and kills the motor. Come now I need some help to put me on the right track to get er fixed. Thanks Dean
baskett-2 is offline   Reply w/quote Quick reply to this message
Sponsored Links
Old 09-22-2019, 11:03 AM   #2
DC Crew
7TRoadster's Avatar
Posts: 1,773
Member #106320
Member since: May 2010
Location: Kennewick, WA

My Corvette(s)
1970 Roadster, Mast Motorsports LS7, TKO 600, SS Frame, C4 suspension

Thanks: 44
Thanked 162 Times in 144 Posts
Next I would try to isolate the problem further. Disconnect the drive line and push it slightly forward to clear the flange. You should be able to tell if it's the differential or transmission by turning the flange. Go from there.
7TRoadster is online now   Reply w/quote Quick reply to this message
Old 09-26-2019, 06:01 AM   #3
Supporting Vendor
gtr1999's Avatar
Posts: 3,762
Member #44662
Member since: Apr 2006
Location: New Haven CT-USA!!!

My Corvette(s)
69 & 72

Thanks: 18
Thanked 177 Times in 159 Posts
Disconnect the driveshaft at the differential pinion yoke.
See if the pinion moves, if not disconnect the 1/2 shafts at the diff and try again.

Most likely it is a backed out ring gear bolt or a broken posi. Once the diff is disconnected from the shafts it should freely move, if the parking brakes are broken and jammed up typically the diff will drive through them. With the shafts free of the diff the wheel should move free as well.

Look up my diff threads here in the tech page for pictures that might help you.
gtr1999 is offline   Reply w/quote Quick reply to this message
69 vert 350 M20-373's
72 coupe 350,TH400,336's
Old 09-28-2019, 02:36 PM   #4
garys 68
DC Crew
Posts: 350
Member #94630
Member since: Nov 2009
Location: St Louis/MO

My Corvette(s)
68 vert

Thanks: 0
Thanked 43 Times in 38 Posts
Differential broke or you're stuck in 2 gears in the trans, usually reverse and a forward. Disconnect the driveshaft like GTR said, start it, let out the clutch.
garys 68 is offline   Reply w/quote Quick reply to this message
Old 09-29-2019, 09:41 PM   #5
DC Crew
zimmej51's Avatar
Posts: 146
Member #171434
Member since: Mar 2017
Location: Edmond OK

My Corvette(s)

Thanks: 4
Thanked 15 Times in 13 Posts
I'd say do all of the above, that's a good diagnostic procedure. One other possibility is that one of the hub bearings in the trailing arm has failed and locked up. These hub bearings have a history of failing, usually because the lubricant (grease) has broken down. Several outfits make a re-greasing tool but it is a PITA to use. To find out for sure, remove the half shafts and see if the rear wheel(s) will turn.
zimmej51 is offline   Reply w/quote Quick reply to this message
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Corvette Forum : DigitalCorvettes.com Corvette Forums forums, you must first register.
Please enter your desired user name (12 CHARACTERS MAXIMUM), your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
City / State / Country?
Where you live
What kind of Corvette(s) do you own?
This field is not required.
Please select your insurance company (Optional)


Thread Tools

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

Forum Jump

Powered by vBadvanced CMPS v3.2.2

All times are GMT -6. The time now is 05:21 PM.

Powered by vBulletin® Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
2003-2011, DigitalCorvettes.com - All Rights Reserved