66 327/350 accelerator rod

[Rich G.]

My 66 has a rod that is too short and barely catches a thread in the carb fitting end, so I bought the correct one and low and behold because of the way the PO adjusted the accelerator pedal, the correct rod is too long.

I know from the drawings that the arm can be adjusted but I can't see how to get to it on the car. Any advice is appreciated.

My other choice is to cut the new rod, leaving it a bit longer than the old one, but that requires extending the threaded part which is a quarter-36 thread as far as I can tell and a die for that appears to be made from unobtanium.

Rich

[Donald O.]

Re: 66 327/350 accelerator rod

My 66 has a rod that is too short and barely catches a thread in the carb fitting end, so I bought the correct one and low and behold because of the way the PO adjusted the accelerator pedal, the correct rod is too long.

I know from the drawings that the arm can be adjusted but I can't see how to get to it on the car. Any advice is appreciated.

My other choice is to cut the new rod, leaving it a bit longer than the old one, but that requires extending the threaded part which is a quarter-36 thread as far as I can tell and a die for that appears to be made from unobtanium.

Rich

Rich,
PLEASE put the hacksaw down and step away from being a Bubba

find where the correct linkages were bent and straighten, then the correct rod will fit. If need be replace the rest with the correct parts.

The threads are 1/4-28 UNF

DonO

[Rich G.]

Re: 66 327/350 accelerator rod

Don

I want to do it the right way. Nothing is bent. It's just that the accelerator arm on the gas pedal shaft is adjusted wrong...too far forward to compensate for The short rod. The issue is, I can't see how to get to it to re- adjust it.

The new rod is from LICS and the threads are definitely not quarter 28. The new rod threads into the carb fitting fine. A quarter 28 die will not go on. Measuring with a thread gauge and calipers gave us the quarter 36 number.

So, I have not tried to get to the arm from below, but it doesnt look like I can get it from the top.

Re-adjusting the gas pedal arm is what needs to be done. Its just not obvious to me how to do it.

Rich

[David L.]

Re: 66 327/350 accelerator rod

Rich,

The "L"-shaped rod (GM # 3847956 in the 1966 AIM, UPC 6, sheet D1) and the lever (GM # 3869750 in the 1966 AIM, UPC 6, sheet D2) are not adjustable. I believe that I have an original 3880168 rod as well as some NOS swivels (GM # 3758592) somewhere in my collection. I will try to find the rod and swivels but do not hold your breath.

Dave

[Rich G.]

Re: 66 327/350 accelerator rod

Dave

Thanks. I was looking at the drawing in the LICS catalog and it shows the arm that has the hole for the rod and the bushing on one end has a clamp like fitting on the other end that clamps around the shaft that rotates when the pedal is depressed. Based upon that, I thought I could loosen that and move it. The way it is now, the arm almost touches the shielding bracket in the most forward position which is not right.

Anyway, I defer to the AIM.

This is not an urgent issue. The car drives fine. It just makes me crazy. I can barely get the idle low enough because the arm hits the shielding bracket, which is what started me looking at the whole set up.

Rich

[John H.]

Re: 66 327/350 accelerator rod

it shows the arm that has the hole for the rod and the bushing on one end has a clamp like fitting on the other end that clamps around the shaft that rotates when the pedal is depressed. Based upon that, I thought I could loosen that and move it.

Rich -

That joint is non-adjustable - the rod from the accelerator pedal has a flat on it where the lever clamps to it, with matching flats on the folded end of the lever it fits into.

[Rich G.]

Re: 66 327/350 accelerator rod

John

Thanks. So I guess there is at least one other wrong part in the system.

I've had this car for almost ten years and every issue I get into is like peeling an onion. The next guy is going to have a real nice car

Rich

[David L.]

Re: 66 327/350 accelerator rod

Rich,

Are you sure you have the 1966 linkage parts?

L-shaped pedal rod
1963 -------- 3830512
1964-1967 ---3847956

Lever
1963 ----------3825204
1964-1965 --- 3844175
1966-1967 --- 3869750

carb. rod
1963-1965 --- 3825203
1966-1967 --- 3880168

I once had a NOS linkage set for a 1963 that I sold a few years ago and it was definitely different when I compared it to my original 1966 linkage. If you mix these parts up I'm sure that you will have problems.

Dave

[Rich G.]

Re: 66 327/350 accelerator rod

David

I bet you are right. I know the new rod is the correct part, but it would appear that the PO perhaps used some parts that were from an earlier car.

When I first got this car it had a home made clutch rod that had a weld in it so of course I just ordered the right one. How hard could it be? Well, the reason it had the custom part was that the wrong throw out bearing was installed and with the stock clutch rod, the clutch would not disengage.

Since the trans had to come out anyway (don't ask) we fixed the TO bearing and used the right clutch rod. Sounds like I have some more detective work to do.

Thanks for the advice. Now I know what I need to do.

Rich