c6 issues, potential giveaways??
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Senior User
Joined: Oct 2008
Posts: 127
Likes: 0
From: Greensboro North Carolina
Good deal fellas. Yea, I've got a few parts to toss in while im at it, including a mod. valve. Ill let you guys know what I see this weekend, and just out of curiousity, to those who have been so unfortunate to find out, what is the cost of a rebuild on these trannys, not much, right? 1000-1400 or so?
Lead Driver
Joined: Nov 2003
Posts: 6,900
Likes: 3
From: Campbell River, B.C.
I agree. $1000 is too much to overhaul a C6 unless it includes removal and install, but even then. Used working C6's are usually priced at $300 each. I actually have one and couldn't sell it for $200 locally.
Cargo Master
Joined: Nov 2003
Posts: 2,585
Likes: 1
From: Duluth, Mn.
Don't put any Lucas in Your tranny. It foams to much.
Get some Lubeguard.
Change Fluid and filter, add one pint of Lubeguard, change the vacuum modulator rubber line, then adjust the VRV. You'll prolly be good to go for miles.
Get some Lubeguard.
Change Fluid and filter, add one pint of Lubeguard, change the vacuum modulator rubber line, then adjust the VRV. You'll prolly be good to go for miles.
Cargo Master
Joined: Nov 2003
Posts: 2,585
Likes: 1
From: Duluth, Mn.
Vacuum Regulator Valve--C-6
Remove the throttle cable and return spring. Reinstall the return spring to hold the throttle bellcrank at wide open throttle (engine off). Remove the vacuum modulator hoses from the VRV; install a vacuum gauge on the lower (output) port and a vacuum pump on the upper (input) port. Apply vacuum and maintain 20 in/HG on the gauge; cycle the bellcrank from WOT to idle position 5 times. A gauge block for the throttle lever can be improvised using the 13mm head of an 8mm bolt. Insert the head of the bolt between the flat boss on the right side of the injection pump and the throttle travel screw. The vacuum gauge should read 6-8 in/HG. If it does not, loosen the VRV screws and adjust the VRV so the gauge reads 7 in/HG. If this reading cannot be achieved, replace the VRV and restart this procedure. After adjusting the VRV, remove the spring, apply and maintain 20 in/HG of vacuum to the VRV and cycle the throttle 5 times. The vacuum gauge should read at least 13 in/HG at idle position. If it does not, replace the VRV and repeat this procedure.
Remove the throttle cable and return spring. Reinstall the return spring to hold the throttle bellcrank at wide open throttle (engine off). Remove the vacuum modulator hoses from the VRV; install a vacuum gauge on the lower (output) port and a vacuum pump on the upper (input) port. Apply vacuum and maintain 20 in/HG on the gauge; cycle the bellcrank from WOT to idle position 5 times. A gauge block for the throttle lever can be improvised using the 13mm head of an 8mm bolt. Insert the head of the bolt between the flat boss on the right side of the injection pump and the throttle travel screw. The vacuum gauge should read 6-8 in/HG. If it does not, loosen the VRV screws and adjust the VRV so the gauge reads 7 in/HG. If this reading cannot be achieved, replace the VRV and restart this procedure. After adjusting the VRV, remove the spring, apply and maintain 20 in/HG of vacuum to the VRV and cycle the throttle 5 times. The vacuum gauge should read at least 13 in/HG at idle position. If it does not, replace the VRV and repeat this procedure.
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