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Old 03-12-2018, 10:16 PM   #1
bmchevy1979
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SM465 Issues (PLEASE HELP!!)

Hello Everyone,
I alao asked in the engine & drivetrain section but figured I'd get better responses here so I have a problem I was driving my k5 to work this morning and I came up on some slow moving traffic so when I had an opportunity to pass I downshifted to 3rd and got around the vehicle in a timely manner but when I went to shift back into 4th the shifter was stuck in gear. I was almost to work so I just cruised in 3rd. I've already pulled the shifter and tried lining up the shifter gates with a bar but it is stuck. I also pulled one of the PTO covers off and everything seems to be in place. I also tried removing the cover but I can't get the cover off without putting the tower part way into reverse which won't happen if it's in 3rd At least that I can think of. So to my question, is there any way to remove the shift tower with it jammed in gear? I honestly believe it's something with the shift tower detents.
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<Brandon>
1974 Chevrolet K5 Blazer 350sbc/SM465/NP205, dana44 front, corp 14bolt rear with 3.73s and a powertrax locker, custom rear bumper 400sbc in the works.
1979 Chevrolet K5 Blazer currently full-time 4x4 W/ 350sb, th350, np203, corp 10bolt front, corp 12bolt rear with 3.08s,R.I.P. http://67-72chevytrucks.com/vboard/s...d.php?t=434096
1976 Chevrolet C10 Scottsdale long-bed, 350sb, th350, corp 12bolt rear, heavy-duty rear suspension,R.I.P. http://67-72chevytrucks.com/vboard/s...d.php?t=434195
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Old 03-12-2018, 10:18 PM   #2
andyh1956
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Re: SM465 Issues (PLEASE HELP!!)

Sounds like you're gonna have to get rough with it, maybe rough enough to break something. Good luck!
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Old 03-12-2018, 10:36 PM   #3
bmchevy1979
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Re: SM465 Issues (PLEASE HELP!!)

I have that feeling as Well.
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<Brandon>
1974 Chevrolet K5 Blazer 350sbc/SM465/NP205, dana44 front, corp 14bolt rear with 3.73s and a powertrax locker, custom rear bumper 400sbc in the works.
1979 Chevrolet K5 Blazer currently full-time 4x4 W/ 350sb, th350, np203, corp 10bolt front, corp 12bolt rear with 3.08s,R.I.P. http://67-72chevytrucks.com/vboard/s...d.php?t=434096
1976 Chevrolet C10 Scottsdale long-bed, 350sb, th350, corp 12bolt rear, heavy-duty rear suspension,R.I.P. http://67-72chevytrucks.com/vboard/s...d.php?t=434195
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Old 03-13-2018, 05:23 PM   #4
bmchevy1979
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Re: SM465 Issues (PLEASE HELP!!)

Ok so an update I was able to get the shift tower off. And it isn't stuck like I had originally thought the shift collar for 3rd & 4th gear is stuck on 3rd it's free floating but won't slide back to neutral
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<Brandon>
1974 Chevrolet K5 Blazer 350sbc/SM465/NP205, dana44 front, corp 14bolt rear with 3.73s and a powertrax locker, custom rear bumper 400sbc in the works.
1979 Chevrolet K5 Blazer currently full-time 4x4 W/ 350sb, th350, np203, corp 10bolt front, corp 12bolt rear with 3.08s,R.I.P. http://67-72chevytrucks.com/vboard/s...d.php?t=434096
1976 Chevrolet C10 Scottsdale long-bed, 350sb, th350, corp 12bolt rear, heavy-duty rear suspension,R.I.P. http://67-72chevytrucks.com/vboard/s...d.php?t=434195
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Old 03-13-2018, 10:37 PM   #5
andyh1956
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Re: SM465 Issues (PLEASE HELP!!)

OH OK then the sliding clutch for 3-4 syncro is the problem.
Most more likely the keys have become dislodged under the sliding collar. There are three of them held up against the bottom of the collar w' two springs. The blocking rings fit against the keys w/ notches cut into them. Look to see if you can see any of them outta the notches.

Last edited by andyh1956; 03-13-2018 at 10:51 PM.
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Old 03-16-2018, 08:12 AM   #6
bmchevy1979
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Re: SM465 Issues (PLEASE HELP!!)

Ok thank you I am getting ready to buy a rebuild kit I'll add these to my list and just start fresh this time when I put it back in I pulled it out the other day after work
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<Brandon>
1974 Chevrolet K5 Blazer 350sbc/SM465/NP205, dana44 front, corp 14bolt rear with 3.73s and a powertrax locker, custom rear bumper 400sbc in the works.
1979 Chevrolet K5 Blazer currently full-time 4x4 W/ 350sb, th350, np203, corp 10bolt front, corp 12bolt rear with 3.08s,R.I.P. http://67-72chevytrucks.com/vboard/s...d.php?t=434096
1976 Chevrolet C10 Scottsdale long-bed, 350sb, th350, corp 12bolt rear, heavy-duty rear suspension,R.I.P. http://67-72chevytrucks.com/vboard/s...d.php?t=434195
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