C6 shifter rod, I don't get it

1310 Views 7 Replies 1 Participant Last post by camachinist, Apr 3, 2001

Discussion Starter · Apr 2, 2001

How many positions should the shifter linkage for my out of the car C6 go into? If I grab the rod the shifter links to I'm only able to move it through three positions. Is there something here I'm not understanding or should I be able to move it through all six slots? I'm afraid that I'll put it in and only be able to go in reverse! I took the valve body out and the rod appears to be engaging it right, but what do i know.
Any help would be greatly appreciated

Matt Williams
67 coupe, 289

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camachinist

· #2 · Apr 2, 2001

Are you able to engage Park? You may have to turn the tailshaft to engage the parking pawl...

From park you should have five detents...

Did you check the operation of the manual valve spool in the valve body when you had it out?

Is it possible that you're getting binding between the downshift actuator and the shift actuator?

Check a few things and get back to us...

Pat
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Discussion Starter · #3 · Apr 2, 2001

the tailshaft spins in one direction, in all three positions. I'm not sure what the valve spool is, or the downshift actuator. I'll go take the valve body back out.

Matt Williams
67 coupe, 289

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camachinist

· #4 · Apr 2, 2001

Yeah, there's a sprag in the back of the trans that will only allow you to turn the tailshaft one way easily...

The valve spool is the thing the shift rod fits into and moves...there is a spring-loaded ball in the valve body that fits into detent slots in the spool to hold it in the different gear selections....you may see some of the detents when looking at the spool when in the valve body...
The downshift rod has a shaft which runs inside the shift rod shaft and its lever engages the downshift valve in the valve body...you should see two levers contacting the valve body...the larger one being the shift lever....both of these levers must fit into or onto their corresponding valve spools for everything to operate smoothly...

Post back if you have any questions...

Pat
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Discussion Starter · #5 · Apr 2, 2001

i see both of the rods you're talking about, one hits a notch in the valve spool and slides it one way or the other, the other hits a little spring loaded button which i assume is the downshift valve. I'm wondering about this rod that connects to the gear selector linkage that goes up into the tailshaft, could it be the problem? it seems to be in there right.
thanks

Matt Williams
67 coupe, 289

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camachinist

· #6 · Apr 2, 2001

Just so I'm clear, when you disconnect the shift linkage from the shifter and try to shift the trans manually, you can only get 3 detents...Is that right....your floor shifter is in no way connected to the trans when you're doing this, yes?

Have you had the valve body out of the trans (I thought you said you did) and, if so, did you try to move the shift valve through all its detents?

Also, does the downshift linkage operate smoothly against the downshift valve?....it's spring loaded and there's no detent...

What exactly were you wondering about the shift rod going up towards the tailshaft? The rod should run from the shifter arm to the arm on the bottom of your floor shifter....do you think something is hitting back there?

Lastly, do you have a service manual for your car? Many procedures such as this one are covered in the manual as well as the procedure for adjusting your shift rod....have you gone through all that stuff and are still nonplussed?

I just want to be sure where we are on this...*G*

Pat
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Discussion Starter · #7 · Apr 3, 2001

the trans isn't in the car, it's sitting in my garage waiting to go into my '67 along with a big block. So there's no floor shifter connected to it. Yep, I had the valve body out to put in a shift kit, it was so long ago that I can't remember checking if it went through the gears before I put it in. The downshift linkage is operating fine against the downshift valve. The rod I'm talking about is the one inside the case, it connects the linkage to something up in the tailshaft - I can't see what. It falls out when I take out the valve body, since the linkage is able to rotate - it swings down. It felt like I had it up in there right when I put the valve body back in. What does it engage? I have a manual but it wasn't helping. But the problem isn't in the linkage, must be in the valve body or the rod I talked about.
I wont have time to take it apart until later tonight, so i'll let you know what happens when I pull out the valve body and try moving the shift valve through it's detents.
thanks pat

Matt Williams
67 coupe, 289

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camachinist

· #8 · Apr 3, 2001

Understand valve body...let me know...

Linkage..hmm IIRC the front of that sucker is supposed to engage your shift lever and it runs into the tailshaft area to engage the parking pawl to lock the tailshaft when you put the trans in park...

I'll take a look at a C6 case out in the shop and see if I can offer any further explanation...

Let me know what you find...

Pat
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