77 truck will only go in 4th

dirtybob · 10-24-2009, 06:41 PM

Hey guys and gals new guy here. I just got a 77 pickup that runs like a champ but the tranny only goes into 4th. What i mean is the shifter will move into all gears but when you let the clutch pedal out it grinds like its not totally in gear.

I've taken a look at the slave cylinder and the adjuster nut is all the way out but the clutch lever on the tranny is only at about 50% of travel with the pedal to the floor. Anyone know if that would be the problem or is the tranny toast? Regardless im going to bleed the system and put on a new slave cylinder on tomorrow. Any other ideas as to what would cause this?

thanks
DB

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Kiroshu · 10-24-2009, 06:46 PM

Try the slave cyl but it sounds to me like a few synconizers went "klunk"

dirtybob · 10-24-2009, 06:53 PM

I don't think its the syncro's. The reason is that the truck can be in first all the way and when you let the clutch out the gear grinds. It starts to grab and the truck will inch forward, but fully releasing the clutch pedal causes the grind. Would that be a syncro? I always thought the syncros would cause a grind when going from a gear to another gear, or am i wrong?

thanks
DB

Kiroshu · 10-24-2009, 07:06 PM

Oh i see what your saying now..... yea your clutch may not be engaging all the way causing the syn to slip off the gear because its only grabbed like a pinch of it..... tiz possible..... if it flows into all the gears fine without jumping out your syncs should be fine. Yea try the slave cly and possible clutch master cyl..... clutch pedal out of adjustment.... try adjusting it a bit maybe....

10-24-2009, 06:46 PM	#2 (permalink)
Kiroshu Registered User Join Date: Oct 2007 Location: wade, NC Posts: 1,305	Try the slave cyl but it sounds to me like a few synconizers went "klunk" __________________ My current: 1986 Toyota 4runner SR5 EFI 4cyl 2.4L 22RE 5-Speed 242,000 Miles 95% Stock __________________ (Still working on restoring her) My old: 1988 Toyota 4runner SR5 EFI V6 3.0L 3VZ-E 5-Speed 302,000 Miles All stock (sold)______________ (Was my fastest truck i miss her...) My old: 1989 Toyota 4runner Non-SR5 EFI 4cyl 2.4L 22RE Automatic 231,000 Miles (sold)______________ (was my quietest and slowest yota.)

10-24-2009, 07:06 PM	#4 (permalink)
Kiroshu Registered User Join Date: Oct 2007 Location: wade, NC Posts: 1,305	Oh i see what your saying now..... yea your clutch may not be engaging all the way causing the syn to slip off the gear because its only grabbed like a pinch of it..... tiz possible..... if it flows into all the gears fine without jumping out your syncs should be fine. Yea try the slave cly and possible clutch master cyl..... clutch pedal out of adjustment.... try adjusting it a bit maybe.... __________________ My current: 1986 Toyota 4runner SR5 EFI 4cyl 2.4L 22RE 5-Speed 242,000 Miles 95% Stock __________________ (Still working on restoring her) My old: 1988 Toyota 4runner SR5 EFI V6 3.0L 3VZ-E 5-Speed 302,000 Miles All stock (sold)______________ (Was my fastest truck i miss her...) My old: 1989 Toyota 4runner Non-SR5 EFI 4cyl 2.4L 22RE Automatic 231,000 Miles (sold)______________ (was my quietest and slowest yota.)

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10-24-2009, 06:53 PM	#3 (permalink)
dirtybob Registered User Join Date: Oct 2009 Location: cle elum, wa Posts: 5	I don't think its the syncro's. The reason is that the truck can be in first all the way and when you let the clutch out the gear grinds. It starts to grab and the truck will inch forward, but fully releasing the clutch pedal causes the grind. Would that be a syncro? I always thought the syncros would cause a grind when going from a gear to another gear, or am i wrong? thanks DB