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-   70-73 Firebird & TA TECH (https://forums.maxperformanceinc.com/forums/forumdisplay.php?f=437)
-   -   Want to upgrade my 4speed shifter (https://forums.maxperformanceinc.com/forums/showthread.php?t=873268)

grd777 04-20-2024 02:36 PM

Want to upgrade my 4speed shifter
 
I have an original hurst shifter on a Muncie m20 trans.i had it rebuilt along with the trans but not very happy with the way it shifts .seems to be hard to get into the gears .i heard about the short throw shifter ,any advice or suggestions

johnta1 04-20-2024 03:03 PM

It may just need adjustment?
Even if rebuilt, when put back on the linkages have to be adjusted just right for a smooth shift. A mis-adjusted throwout bearing can cause problems also.


Service Manual shows how to adjust them.


:)

grd777 04-20-2024 04:37 PM

Quote:

Originally Posted by johnta1 (Post 6499210)
It may just need adjustment?
Even if rebuilt, when put back on the linkages have to be adjusted just right for a smooth shift. A mis-adjusted throwout bearing can cause problems also.


Service Manual shows how to adjust them.


:)

My next step is to adjust the linkage. How can I tell if the throw out bearing is out of adjustment

johnta1 04-20-2024 05:08 PM

1 Attachment(s)
This is from Service Manual:


https://forums.maxperformanceinc.com...1&d=1713647047


For me, the main thing is that the disc isn't still engaged when the clutch is fully pressed in. If it's hanging any amount, it will keep the tranny shaft rotating making it harder to get in next gear.



If you know how to shift without the clutch, it would shift good.


:)

johnta1 04-20-2024 05:13 PM

2 Attachment(s)
Shifter Adjustment:

grd777 04-20-2024 05:26 PM

Quote:

Originally Posted by johnta1 (Post 6499225)
Shifter Adjustment:

You are a great help, this is a great hobby because of guys with your knowledge and care

Cammer-6 04-20-2024 08:07 PM

all that info is in the FSM(factory service manual)
buy a reprint of it(its cheap)
Its amazing how much info is in it.
Get one for the year and model you are working on.

grd777 04-20-2024 08:14 PM

Quote:

Originally Posted by Cammer-6 (Post 6499253)
all that info is in the FSM(factory service manual)
buy a reprint of it(its cheap)
Its amazing how much info is in it.
Get one for the year and model you are working on.

Again with this type of reply. READ the question

unruhjonny 04-30-2024 12:19 PM

1 Attachment(s)
"hard to get into gears" won't be fixed by a shorter throw.

this comes down to spending sufficient time on getting the geometry just right.

My opinion is that the rubber factory shifter grommets are a part of the shifter issues;
This is where an aftermarket Hurst Competition Plus really shines;
With a HCP shifter you can use the original style plastic(?) bushings, or go with steel bushings.

I have swapped parts between aftermarket and OEM shifter to have a factory housing and lever with the HCP gear selectors to eliminate the rubber bushings in favor of the aftermarket style.

So, if you get the rods nailed just right with the correct levers (or the levers you have), the only upgrade that will really make any discernable improvement from that point is to go with a factory-aftermarket hybrid shifter.

https://forums.maxperformanceinc.com...1&d=1714493752

The net result is a much more solid shifter feel, with the only down side being you will feel more drivetrain vibration through the shifter.


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