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04-20-2021, 04:31 PM
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#1 |
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Registered User
Join Date: Sep 2008
Location: falls church, va
Posts: 57
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86 4 spd won’t shift
Guys,
I have an 86 that someone added an older Muncie 4spd to at some point. I had a new clutch installed and then it sat for 2 years. I just charged the battery and sprayed some carb cleaner in the Holley. It fired right up. The clutch pedal presses down like I remember but the shifter won’t go into gear now that it’s running. Just earlier today it would go into gear before I had it running. The reservoir for the clutch was almost empty. I added dot 3 fluid. What should I do next? |
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04-20-2021, 05:16 PM
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#2 |
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Moderator
 
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,912
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Re: 86 4 spd won’t shift
Bleed the slave cylinder.
__________________
1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...
And please let us know if and how your repairs were successful. |
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04-20-2021, 07:04 PM
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#3 |
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Sb 400 club
Join Date: Nov 2005
Location: NH / MA
Posts: 2,741
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Re: 86 4 spd won’t shift
Bleeding these clutches can be hard. I normally remove the master and slave and resivour as a unit and hold the slave above the resivout to bleed.
With the engine off and you put it in granny or reverse? Holding the clutch down start the truck does it move with the clutch depressed? Clutch disc could be stuck but I bet it's just air or a bad hydro component.
__________________
 1984 chevy c10, built 400sb,.(SOLD )77 K10 Project / daily driver "The Grinch" http://67-72chevytrucks.com/vboard/s...d.php?t=318363 1956 Willys Wagon (327 chevy) Project (Now Buick 225) 1980 Corvette L-48 4 speed 1992 Mustang GT built 5.0 5 speed  1985 C10 LWB Sold 1982 K10 SWB plow truck Parted out 1986 D30 M1028 fire brush truck Parted out |
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04-20-2021, 07:37 PM
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#4 |
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Moderator
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,912
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Re: 86 4 spd won’t shift
The squarebody hydraulic clutches were a pain in the neck to bleed out.
You can do it with just the slave off. Tip the slave to put the bleeder at the top and push the slave plunger in and out. The new parts quality was poo in the late 1990's. I went through five new master cylinders and more slave cylinders before I got one that didn't leak on my 1985 C10.
__________________
1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...
And please let us know if and how your repairs were successful. |
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04-22-2021, 02:41 PM
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#5 | |
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Registered User
Join Date: Jan 2009
Location: Arkansas
Posts: 670
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Re: 86 4 spd won’t shift
Quote:
Try putting it in 3rd gear, push the clutch, and then try to start it. Make sure no one is in front of you when you do it, as it will likely roll forward until the flywheel breaks loose. If the clutch reservoir was "almost empty" it shouldn't have air in the lines, IMO. |
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