1964 3-4 shift rod length

[Edward M.]

I have looked everywhere I can think of, and got nada.

What is the length of the 3rd - 4th gear shift rod on a 1964 Corvette? This is with a factory shifter and a Muncie transmission.

I believe the original part number for this rod is 3852922.

[Alan D.]

Re: 1964 3-4 shift rod length

It's just over 12", do not have exact # (unable to make a good measurement on car)
Not sure if that helps.

[Edward M.]

Re: 1964 3-4 shift rod length

It's just over 12", do not have exact # (unable to make a good measurement on car)
Not sure if that helps.

That may be the measurement of the 1st-2nd shift rod. The 3rd-4th shift rod is the long one of the two.

[Edward M.]

Re: 1964 3-4 shift rod length

The 3-4 rod on my car is about 17 1/2 inches long - end to end. It is not long enough to reach the 3-4 shift lever when the 3-4 shift lever is in the "outside" position. Here are a couple of photos to illustrate. The second photo is the 3-4 rod with both the shifter and the transmission in neutral.

My best guess is that the correct 3-4 shift rod for a 1964 Corvette is about 19 inches long.

[Alan D.]

Re: 1964 3-4 shift rod length

OK, measured the correct rod now! It is about 17" from shift to hole in arm. These pictures are not the best and I' take some more, but they may give you an idea. Also look at an assortment of arms. Take a look at page 235 in Noland's book, the shop drawing shows an overall length is 17.48 Also note the rod is straight, no bends (have another rod about same lenght , but it has bends in it)

[Carl N.]

Re: 1964 3-4 shift rod length

Had to go out in the shed and find the shifter, so I'm late to the party. Long rod is 3-4 shift rod

[Alan D.]

Re: 1964 3-4 shift rod length

Believe that's a later design. from Joe Lucia "The 1964 shift levers were one-year-only pieces. I do not think they are reproduced. If anyone has them in reproduction I would expect it would be Long Island Corvette."
The 64 shifter levers were also unique, both had 2 bends and marked as 1-2 & 3-4 but did not have the extra holes for "fast shift", again see Noland page 292 which also shows another 3-4 rod with bends at a total length of 17.36
So one needs the corrects rods and associated levers to make things work

[David B.]

Re: 1964 3-4 shift rod length

Blueprint for #5850112 shows 2 slight bends at 1.75 and 8.50 from center of end pin. Full threaded end is 1.78 7/16 - 20. Print states " Developed length approximately 18.8". Two months after original design a slight change was made to this third & forth rod by increasing the depth of the end pin from .27 to .34. The part number changed to #5852922.

[Edward M.]

Re: 1964 3-4 shift rod length

As you can see from my pictures, my shift levers are marked 1-2 and 3-4, have two bends, and a single hole for the shift rod. So, I believe them to be 1964 shift levers. My 3-4 shift rod is about 17 inches long. But it is not long enough to reach from the shifter to the shift lever with the shifter set in neutral, and the transmission in neutral.

So, SOMETHING is different, I just can;t figure out what the SOMETHING is.

[Alan D.]

Re: 1964 3-4 shift rod length

So just where is the shifter assembly mounted, to transmission or bracket on frame?

[Edward M.]

Re: 1964 3-4 shift rod length

So just where is the shifter assembly mounted, to transmission or bracket on frame?

It is mounted to the transmission.

[Carl N.]

Re: 1964 3-4 shift rod length

So just where is the shifter assembly mounted, to transmission or bracket on frame?

Believe shifter was mounted to frame beginning in 1966, 1967 for sure. This was done to reduce customer complaints of rattling in 4th. IMO '63, '64, '65 were all mounted to tailshaft on transmission.

[Timothy B.]

Re: 1964 3-4 shift rod length

As you can see from my pictures, my shift levers are marked 1-2 and 3-4, have two bends, and a single hole for the shift rod. So, I believe them to be 1964 shift levers. My 3-4 shift rod is about 17 inches long. But it is not long enough to reach from the shifter to the shift lever with the shifter set in neutral, and the transmission in neutral.

So, SOMETHING is different, I just can;t figure out what the SOMETHING is.

I am not sure this will help but have you adjusted the shifter levers so they are indexed in the correct position BEFORE adjusting the rods where they enter the transmission lever holes.

[Edward M.]

Re: 1964 3-4 shift rod length

I have tried every possibly combination of positions.

The simple fact is that, with the shifter in neutral (and the neutral alignment tool in place), and the transmission in neutral, the 3-4 rod fits fine if the 3-4 lever is mounted to the transmission in the "innie" position.

When I try and mount the 3-4 transmission lever in the "outie" position, it moves the hole for the shift rod forward. So far forward that the 3-4 shift rod is not long enough to even reach the 3-4 shift lever.

This picture is with the shifter in neutral (the neutral alignment tool in place), and the 3-4 rod connected to the shift lever internal to the shifter. As you can see, the 3-4 rod does not even get close to reaching the hole in the 3-4 transmission shift lever.

The second picture shoes the difference in position of the hole for the shift lever with the lever mounted in the "innie" vs. "outie" position.

I am hoping someone has a god picture of the transmission, with shifter mounted for a 1964 Corvette.

[Edward M.]

Re: 1964 3-4 shift rod length

Believe shifter was mounted to frame beginning in 1966, 1967 for sure. This was done to reduce customer complaints of rattling in 4th. IMO '63, '64, '65 were all mounted to tailshaft on transmission.

Yes this occurred during the 1966 model year, around Jan or Feb of 1966 as I recall.