Muncie 4-speed clutch arm (Page 1/3)
8t6gt APR 01, 01:02 PM
Clutch went out on my '86 GT with Muncie 4-speed. Ordered Rodney Dickman's master and slave cylinders hoping that was the problem. Installed the master cylinder and took off the slave cylinder only to find that the clutch arm was broken. Car has been down for almost 4 weeks now and cannot seem to be able to locate a clutch release arm anywhere. Anyone know where I can get one?
Any help appreciated 🙏
Skybax APR 01, 02:30 PM
Welcome, my 86 GT 4-speed is also from Denver! Can you post a photo of your broken clutch arm? You might be better off putting your Wanted Ad in the Mall section.

Also be advised, the 4-speed slave cylinder attaches to an aluminum bracket that cracks over time and eventually breaks, so while you are in there and replacing all those parts I would recommend buying the steel replacement bracket Rodney sells... http://rodneydickman.com/pr...o.php?products_id=59

[This message has been edited by Skybax (edited 04-01-2022).]

8t6gt APR 01, 03:34 PM
I did post in the mall section as well.
Here is the broken arm...
olejoedad APR 01, 06:42 PM
Later transmissions went to a cast arm.
They are interchangeable.
8t6gt APR 01, 06:49 PM
Can't find the later cast one either.
Skybax APR 01, 08:47 PM

quote
Originally posted by 8t6gt:

Here is the broken arm...



Thanks for posting, yep it broke on both sides, here and here...
Skybax APR 01, 08:48 PM

quote
Originally posted by 8t6gt:

Can't find the later cast one either.



I've read the later Getrag 5-speed cast ones are not interchangeable, reduces throw, didn't get full disengagement of clutch, some people had to modify it to get it to work properly with 4-speed, so I would suggest getting another 4-speed stamped steel arm and strengthening/reinforcing it before installing.

Try www.car-part.com which is a junkyard database and you can sort by zip code/distance. (search selecting "transmission" to find entire car first)

Here are the hits I got within 1000 miles of Denver with a Muncie 4-speed...

[This message has been edited by Skybax (edited 04-01-2022).]

8t6gt APR 01, 09:46 PM

quote
Originally posted by Skybax:


I've read the later 5-speed cast ones are not 100% interchangeable, reduces throw, didn't get full disengagement of clutch, some people had to modify it to get it to work properly with 4-speed, so I would suggest getting another 4-speed stamped steel arm and strengthening/reinforcing it before installing.

Try www.car-part.com which is a junkyard database and you can sort by zip code/distance. (search selecting "transmission" to find entire car first)

Here are the hits I got within 1000 miles of Denver with a Muncie 4-speed...






That's my plan, reinforce it!
8t6gt APR 01, 09:47 PM

quote
Originally posted by Skybax:


I've read the later 5-speed cast ones are not 100% interchangeable, reduces throw, didn't get full disengagement of clutch, some people had to modify it to get it to work properly with 4-speed, so I would suggest getting another 4-speed stamped steel arm and strengthening/reinforcing it before installing.

Try www.car-part.com which is a junkyard database and you can sort by zip code/distance. (search selecting "transmission" to find entire car first)

Here are the hits I got within 1000 miles of Denver with a Muncie 4-speed...






Thanks!
Skybax APR 01, 09:59 PM
I've also read the Isuzu 5-speed arms ARE interchangeable with the Muncie 4-speed, but I cannot confirm that. The Fiero Store does sell a new replacement cast arm for the 85-88 4-cylinder 5-speed... https://www.fierostore.com/...spx?s=64300&d=85&p=1

[This message has been edited by Skybax (edited 04-01-2022).]