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4 speed hurst shifter issue

Started by Challenger in NC, November 23, 2025, 12:47:26 PM

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Challenger in NC

Guys,

I am having an issue with the Hurst shifter on my 4 speed being completely locked up. I cannot move it into neutral or into any gears. The car is in the process of being reassembled.
- Transmission, clutch, shifter, linkage is all new or rebuilt.
- The shift rods were assembled as shown in the first couple photos. I adjusted the rods according to the F.S.M. using the alignment pin method.
- After the shifter failed to move, I unhooked the 1-2 and 3-4 rods off the levers to see if the levers would move. The levers engage all three positions 1-N-2 and 3-N-4, reverse also appears to move ok.
- With the rods removed from the transmission levers, I tried moving the rods back and forth. The reverse and 3-4 rod moves back and forth ok, but the 1-2 rod appears to be contacting the edge of the floor (pics 3-5).This is a replacement floor so I'm not sure if this is the issue or not.

My questions are
1. Do the shift rods appear to be hooked up properly. Does anything look suspect with the shifter levers or how the rods attach to them?
2. How close does the 1-2 rod typically get to the edge of the sheetmetal? This appears to be part of the issue that is causing the binding and I may need to trim the area near the rod. How much clearance did the factory leave between the floor and rod, was it tight like this one?


moonshine_mike

None of the 4 speed Cudas I've got have exhibited sheet metal interference even after conversion to 4 speed with new sheet metal. I checked the clearance in one of them just now. It's about 1 inch.
It looks like your reverse lever is 180deg out of phase.
Do you have the correct shim in the transmission mount?


ec_co

Is this a Std 4spd or an OD unit? If it's an OD, one of the rods contacts the sheet metal and has to be cut/lengthened/bent at a certain spot/angle + the lever reversed
The only thing flat earthers fear, is sphere itself.

'70 Barracuda B5/B5 225 /6 3spd ... about as bare bones as they came .... now in 4spd flavor

www.eyecandi3d.com for Reproduction Fender Tags

Challenger in NC

Quote from: moonshine_mike on November 23, 2025, 01:22:13 PMNone of the 4 speed Cudas I've got have exhibited sheet metal interference even after conversion to 4 speed with new sheet metal. I checked the clearance in one of them just now. It's about 1 inch.
It looks like your reverse lever is 180deg out of phase.
Do you have the correct shim in the transmission mount?
I'm not sure that I have any shims in the mount, can you show me what you are referring to?
Sorry, the picture for the reverse rod was one before I flipped the lever 180, I replaced it with an updated photo.

Challenger in NC

Quote from: ec_co on November 23, 2025, 01:33:48 PMIs this a Std 4spd or an OD unit? If it's an OD, one of the rods contacts the sheet metal and has to be cut/lengthened/bent at a certain spot/angle + the lever reversed
Its the std 4 speed

Challenger in NC

Quote from: moonshine_mike on November 23, 2025, 01:22:13 PMNone of the 4 speed Cudas I've got have exhibited sheet metal interference even after conversion to 4 speed with new sheet metal. I checked the clearance in one of them just now. It's about 1 inch.
It looks like your reverse lever is 180deg out of phase.
Do you have the correct shim in the transmission mount?
You might be onto something. Are you referring to these shims? When I installed the mount, I did not notice the location of these shims and it appears I should reverse them which would push trans up and maybe provide enough clearance?


moonshine_mike

No. As far as I know your picture shows metal plates called "spacers" and are installed as you have done for the bolt going through an oval slot similar to a custom washer.  I have however seen very thin shims (one piece) placed between the mount and the transmission. If you do this its probably good to ensure no issue with fan/radiator clearance. I also don't think the FSM calls out shims between the mount and transmission. So this may be just a car guy hack trying to solve an issue they have experienced.

Challenger in NC

Quote from: moonshine_mike on November 23, 2025, 06:40:58 PMNo. As far as I know your picture shows metal plates called "spacers" and are installed as you have done for the bolt going through an oval slot similar to a custom washer.  I have however seen very thin shims (one piece) placed between the mount and the transmission. If you do this its probably good to ensure no issue with fan/radiator clearance. I also don't think the FSM calls out shims between the mount and transmission. So this may be just a car guy hack trying to solve an issue they have experienced.
Thanks

Lunchbox

Per the service manual you have the spacers correct, they appear to be more of a backing plate to help support the bolt head against the transmission mount in this application.

ebodyproducts

It's difficult to say from looking at the pictures, but it looks like the middle lever in the shifter mechanism is considerably longer than the outside lever.  Here is a  picture from Brewer's, both the outer and the middle are nearly the same (reference the holes).  That being said, the middle lever is slightly longer than the outer lever.
E-Body Products
www.ebodyproducts.com
606-481-9014


Challenger in NC

Quote from: Lunchbox on November 24, 2025, 11:10:35 AMPer the service manual you have the spacers correct, they appear to be more of a backing plate to help support the bolt head against the transmission mount in this application.
thanks

Challenger in NC

Quote from: ebodyproducts on November 24, 2025, 11:30:23 AMIt's difficult to say from looking at the pictures, but it looks like the middle lever in the shifter mechanism is considerably longer than the outside lever.  Here is a  picture from Brewer's, both the outer and the middle are nearly the same (reference the holes).  That being said, the middle lever is slightly longer than the outer lever.
Here's the end view

ebodyproducts

Shouldn't the floor pan section be contoured to fit the torsion bar crossmember closer?  It looks like it is up away from it in this picture.
E-Body Products
www.ebodyproducts.com
606-481-9014

Challenger in NC

Probably so. I will probably just make a small relief cut to allow the rod a little more clearance.


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