OH, OH, Driveshaft Problem (C3)
Thread Starter
8th Gear
Joined: Aug 2008
Posts: 8
Likes: 0
From: warrington pa
OH, OH, Driveshaft Problem (C3)
I am rebuilding my '73 C3 (body off) and when I try to re-install the driveshaft (BB engine, trans, driveshaft all new for this car), the driveshaft or its U-joint sit right next to the emergency brake cable bracket (which is welded to the frame). Any other option other than re-welding the bracket a few inched to the left?
Thanks,
Tom
Thanks,
Tom
Melting Slicks
Joined: Aug 2006
Posts: 3,429
Likes: 20
From: Kingston Ontario
With my TKO install my cable was hitting the tranny yoke. I'm going to cut the drivers side of the bracket off, weld a 1/4" plate the same shape as the bracket for strength and use a spacer to move the pulley towards the drivers side with no support on the drivers side of the pulley bolt.
Thread Starter
8th Gear
Joined: Aug 2008
Posts: 8
Likes: 0
From: warrington pa
Driveshaft Problem
Yes, I tried to loosen the vertical bolts through the frame (to the rear of the transmission) to move the transmission to the passenger side, but the trans wasn't moving. Do you mean to loosen the trans at the front of the trans? Won't that cause an alignment issue with the trans/driveshaft.differential?
Thanks for the thought,
Tom
Thanks for the thought,
Tom
Thread Starter
8th Gear
Joined: Aug 2008
Posts: 8
Likes: 0
From: warrington pa
Yes, I tried to loosen the vertical bolts through the frame (to the rear of the transmission) to move the transmission to the passenger side, but the trans wasn't moving. Do you mean to loosen the trans at the front of the trans? Won't that cause an alignment issue with the trans/driveshaft.differential?
Thanks for the thought,
Tom
Drifting
Joined: Jul 2004
Posts: 1,695
Likes: 65
From: Kissimmee fl
Finalist 2021 C3 of the Year - Modified
2017 C3 of Year Finalist
Cruise-In VIII Veteran
St. Jude Donor '07
Not sure why it should be hitting if you are using original style parts. That said, I had the same problem when I installed my 700R4. If you cut the lower lip off of the bracket on the driver side, you can use a 2 1/2 in long 1/2 in bolt to move the roller to the outside of the bracket. A spacer inside of the bracket to keep it from collapsing and you are good to go.
Melting Slicks
Joined: Aug 2006
Posts: 3,429
Likes: 20
From: Kingston Ontario
Yes -- yoke is hitting the emergency brake cable bracket (before rotation, which will make it even worse).
Yes, I tried to loosen the vertical bolts through the frame (to the rear of the transmission) to move the transmission to the passenger side, but the trans wasn't moving. Do you mean to loosen the trans at the front of the trans? Won't that cause an alignment issue with the trans/driveshaft.differential?
Thanks for the thought,
Tom
Yes, I tried to loosen the vertical bolts through the frame (to the rear of the transmission) to move the transmission to the passenger side, but the trans wasn't moving. Do you mean to loosen the trans at the front of the trans? Won't that cause an alignment issue with the trans/driveshaft.differential?
Thanks for the thought,
Tom
Advanced
Joined: Apr 2008
Posts: 91
Likes: 0
From: Stockton California
There's no alignment problems with the drivetrain except for the vertical angle of your transmission in tandem with your differential. As long as the U-joints on your driveline are angled and not straight then you have no problems.
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Melting Slicks
Joined: Aug 2006
Posts: 3,429
Likes: 20
From: Kingston Ontario
I also raised my transmission(TKO) and diff to correct those angles so thats probably helped clear the pulley and bracket more.
Thread Starter
8th Gear
Joined: Aug 2008
Posts: 8
Likes: 0
From: warrington pa
Melting Slicks
Joined: Oct 2002
Posts: 2,317
Likes: 111
From: St Louis MO
I am rebuilding my '73 C3 (body off) and when I try to re-install the driveshaft (BB engine, trans, driveshaft all new for this car), the driveshaft or its U-joint sit right next to the emergency brake cable bracket (which is welded to the frame). Any other option other than re-welding the bracket a few inched to the left?
Thanks,
Tom
Thanks,
Tom
If you car originally had the smaller, but now has the larger, this might cause your interference. What is the measurement across your u-joint from cap end to cap end? If it is 3.219, it is a 1310; if it measures 3.625 it is a 1330 or 1350 (cap diameters 1.063 or 1.188, respectively).
I'm not sure what was original in your car, perhaps someone else knows.
Cheers
Former Vendor
Joined: Aug 2008
Posts: 67
Likes: 0
From: Cookeville TN
Big Yoke?
There was a switch at some point in time to a wider trans yoke, 1330 u-joint and larger drive shaft from the smaller yoke which takes the 1310 u-joint. I don't know when the switch was made, but do know that the early cars (including big block) had the smaller yoke, 1310 u-joints and a small diameter drive shaft. At some later time, the corvettes got the larger yoke, u-joint, and drive shaft.
If you car originally had the smaller, but now has the larger, this might cause your interference. What is the measurement across your u-joint from cap end to cap end? If it is 3.219, it is a 1310; if it measures 3.625 it is a 1330 or 1350 (cap diameters 1.063 or 1.188, respectively).
I'm not sure what was original in your car, perhaps someone else knows.
Cheers
If you car originally had the smaller, but now has the larger, this might cause your interference. What is the measurement across your u-joint from cap end to cap end? If it is 3.219, it is a 1310; if it measures 3.625 it is a 1330 or 1350 (cap diameters 1.063 or 1.188, respectively).
I'm not sure what was original in your car, perhaps someone else knows.
Cheers
Thread Starter
8th Gear
Joined: Aug 2008
Posts: 8
Likes: 0
From: warrington pa
The early TKO kits had 1330 yokes, but for the last few years we have all been selling a smaller 1310 yoke with bolt-on girdles. It is probably not the yoke size. You can push the transmission to the side a bit, which required a little slotting in the holes of the mounting bracket, however you can't do too much adjusting or the yoke will hit the side of the tunnel. Making a small change to the e-cable bracket may be the better part of valor. AP
Thanks,
Tom
