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Fj transmission issue

Started by Connerburns80, January 12, 2023, 10:52:04 AM

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Connerburns80

I just needed help understanding the root of the problem with the FJ transmission issues. Is it due to weak shift forks, or because the cogs are not undercut?
1984 Fj 1100

RPM - Robert

Both.

We stock the upgraded shift forks

Center shift fork
Left shift fork
Right shift fork

and ready to go undercut transmissions

Undercut transmission

Connerburns80

Alright, i seen those. Thank you
1984 Fj 1100

red

Quote from: Connerburns80 on January 12, 2023, 10:52:04 AMI just needed help understanding the root of the problem with the FJ transmission issues. Is it due to weak shift forks, or because the cogs are not undercut?
Connerburns,

I have undercut "cogs" in my 1985 FJ1100, from the previous owner.  Never had any problem.  Better shifter forks do sound like a good option, as well.
Cheers,
Red

P.S. Life is too short, and health is too valuable, to ride on cheap parade-duty tires.

racerrad8

Don't forget about the RPM shift kit as well. The ball bearing roller allows the use os a heavier spring rate which causes the shift fork barrel to rotate quicker and smoother to ensure full engagement when shifting.

RPM Shift Kit

Randy - RPM
Randy - RPM

Connerburns80

I am getting a 84 FJ1100 with second gear issues so i assume need to replace both the gears and the forks as well.
1984 Fj 1100

RPM - Robert

I think the gear pops out from not being undercut and then it bends the shift forks. We have had several people try to do one or the other and I think they have a 100% rate of a second tear down. We usually lean towards doing it right the first time but some people can't be talked into it.

Urx

Some folks like to spend more by doing it twice than doing it properly first time round.
It the same kind of false economy as buying cheap tools and being surprised you need to keep replaceing them when they fail or if you are really lucky just wear out quickly.
Stainless lines
Blue spot calipers but std m/cyl (so far)
Ebc prolite front discs
Ohlins remote adj rear shock
Remus 4:1
Still running original chain and sprockets from new (scotoilers really work)
Krauser k2s

Pat Conlon

High Quality tools, yep  :good2: Except for 10mm sockets....no reason to overspend on those sneaky little bastards...
1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3