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1992 CHEVY 4x4 Won't Go In Gear


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djrebelgal80
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Jan 19, 2013, 1:10 AM

Post #1 of 34 (1605 views)
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1992 Chevrolet 3/4 ton 4x4, granny gear 5-speed manual transmission (rebuilt summer 2012)- 350 motor, mileage unknown (bought brand new motor Feb. 2012)

When stopped or when first cranking the truck, it will not go from neutral to ANY gear. The only way to get it into gear is to kill the truck, put it in first or reverse, then crank it back up and take off. No problems shifting between gears, just from neutral to first or reverse. Replaced slave cylinder today, didn't fix the problem gear oil was and is full, clutch is still good Frown PLEASE HELP!


Hammer Time
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Jan 19, 2013, 6:21 AM

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Re: 1992 CHEVY 4x4 Won't Go In Gear [In reply to] Sign In

It could be a dry pilot bearing but is more likely a clutch problem. It could be an issue with the hydraulics or even the pressure plate. It needs to be looked at by a professional.




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Sidom
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Jan 19, 2013, 12:14 PM

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Re: 1992 CHEVY 4x4 Won't Go In Gear [In reply to] Sign In

Who rebuilt the tranny? Hopefully they used new syncros. This almost sounds like a syncro problem......How does the pedal feel??






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Hammer Time
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Jan 19, 2013, 2:07 PM

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Re: 1992 CHEVY 4x4 Won't Go In Gear [In reply to] Sign In

Reverse doesn't use synchros.




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Sidom
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Jan 19, 2013, 2:28 PM

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Re: 1992 CHEVY 4x4 Won't Go In Gear [In reply to] Sign In

Right.....but he said it won't go into any gear until he stops the engine to put it in gear & then it shifts fine except for 1st & R..... If the pedal is good I would be looking at the rings.....If it pedal feels like cr#p or is low then it's probably in the clutch assembly....

The tranny was torn down a year ago.......if someone cut corners & used old rings cuz they "look good"........well....you know how that goes.....

Got burned one time early one in my career over a pilot bearing....and the damn thing was a bushing at that.......live & learn....






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(This post was edited by Sidom on Jan 19, 2013, 2:28 PM)


Hammer Time
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Jan 19, 2013, 2:58 PM

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Re: 1992 CHEVY 4x4 Won't Go In Gear [In reply to] Sign In

Something is keeping the input shaft turning when the clutch is fully depressed. The clutch can't be totally disengaging. Even is the synchros were totally wiped out, the shaft would eventually stop turning if the clutch was held in and it would shift then.




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djrebelgal80
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Jan 20, 2013, 2:22 AM

Post #7 of 34 (1521 views)
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Re: 1992 CHEVY 4x4 Won't Go In Gear [In reply to] Sign In

Thanks y'all for the info! Hubby went and bought a new clutch kit tonight, putting it in this A.M. Hoping and praying that fixes it (he's the only $$ maker, I'm in law school) He had already bought it when I read the responses...will return for update as soon as I know something!

**Just to let yall know, I was reading through the transmission forum last night, trying to get some idea of things that could cause his issue, and I LOVE LOVE LOVE the way y'all respond to some of the folks on here! I got quite a few laughs!!! Thanks again for the input!! Wink


Hammer Time
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Jan 20, 2013, 8:19 AM

Post #8 of 34 (1512 views)
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Re: 1992 CHEVY 4x4 Won't Go In Gear [In reply to] Sign In

Make sure he rules out the hydraulics before going that far because replacing all those parts won't help a bad clutch master cylinder.




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djrebelgal80
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Jan 20, 2013, 12:06 PM

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Re: 1992 CHEVY 4x4 Won't Go In Gear [In reply to] Sign In

Quick question: If it were a bad master, would he have trouble with the clutch? Would it feel different? I asked him and he said the clutch felt fine, not spongy, not too stiff...he said it was normal...


Hammer Time
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Jan 20, 2013, 12:45 PM

Post #10 of 34 (1501 views)
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Re: 1992 CHEVY 4x4 Won't Go In Gear [In reply to] Sign In

This is a hydraulic clutch system. The clutch master cylinder operates the clutch. The way to tell if it is working right is by the amount of free play in the top. Any more than an inch or two of free play would indicate an hydraulic problem.




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Tom Greenleaf
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Jan 20, 2013, 4:36 PM

Post #11 of 34 (1492 views)
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Re: 1992 CHEVY 4x4 Won't Go In Gear [In reply to] Sign In

Quick read - sorry: Hydraulics is the linkage not the clutch action itself. If and rare to me too the pilot bushing is the issue it can be replaced. 99% don't need that. It does need a smear of grease but it messed up and sticking somehow it has to go. Damn - been a long time but some puller would be needed as they are pressed in, usually a brass or oil releasing brassy thing.

Notes: Letting a trans hang on just input shaft while you get the whole trans at least snug is so common to mess things up it's nuts. Never let the weight of trans torque on the input shaft! -- T


djrebelgal80
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Jan 20, 2013, 5:51 PM

Post #12 of 34 (1484 views)
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Re: 1992 CHEVY 4x4 Won't Go In Gear [In reply to] Sign In

Thanks! He said there's a little play in the top...he's in the process of putting in the new clutch kit right now, then I guess he'll try it out. If it wasn't the clutch, I guess we'll move on to the master cylinder??? And if that doesn't work I guess it'll have to be the synchronizers right?


Hammer Time
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Jan 20, 2013, 5:54 PM

Post #13 of 34 (1481 views)
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Re: 1992 CHEVY 4x4 Won't Go In Gear [In reply to] Sign In


Quote
And if that doesn't work I guess it'll have to be the synchronizers right?


No, reverse doesn't even use synchronizers.




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djrebelgal80
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Jan 20, 2013, 6:38 PM

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Re: 1992 CHEVY 4x4 Won't Go In Gear [In reply to] Sign In

He just told me to ask you how can he tell ifthe flywheel is bad? His has a groove??? in it (his words)


Hammer Time
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Jan 20, 2013, 6:40 PM

Post #15 of 34 (1474 views)
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Re: 1992 CHEVY 4x4 Won't Go In Gear [In reply to] Sign In

A flywheel that is grooved from clutch disc rivets digging into it is definitely bad.




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djrebelgal80
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Jan 20, 2013, 6:45 PM

Post #16 of 34 (1470 views)
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Re: 1992 CHEVY 4x4 Won't Go In Gear [In reply to] Sign In

Ok thanks...so can we have it fixed or do we have to buy a new one?


Hammer Time
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Jan 20, 2013, 6:47 PM

Post #17 of 34 (1466 views)
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Re: 1992 CHEVY 4x4 Won't Go In Gear [In reply to] Sign In

If there is actually a groove in it, then it needs a new one. That would have to mean that the clutch disc was totally wiped out to do that.




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djrebelgal80
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Jan 20, 2013, 8:06 PM

Post #18 of 34 (1459 views)
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Re: 1992 CHEVY 4x4 Won't Go In Gear [In reply to] Sign In

How often should the synchronizers go out?


Hammer Time
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Jan 20, 2013, 8:20 PM

Post #19 of 34 (1455 views)
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Re: 1992 CHEVY 4x4 Won't Go In Gear [In reply to] Sign In

They mainly only wear bad when the transmission is abused.




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djrebelgal80
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Jan 20, 2013, 8:41 PM

Post #20 of 34 (1451 views)
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Re: 1992 CHEVY 4x4 Won't Go In Gear [In reply to] Sign In

oh ok...he doesn't abuse it that I know of, but he does haul heavy stuff...he hauls scrap metal to make a living so there's been times he's had some pretty heavy stuff either in the bed of the truck or behind the truck on his trailer. He's thinking the issue is going to be with either the clutch or master cylinder though. He has to get a new flywheel tomorrow before he can go any further into putting it back together. I will definitely keep this updated, especially if he runs into more problems. Thank ya'll once again for being so helpful! We really appreciate it! Wink


Hammer Time
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Jan 20, 2013, 8:46 PM

Post #21 of 34 (1446 views)
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Re: 1992 CHEVY 4x4 Won't Go In Gear [In reply to] Sign In

Synchros get damaged by slamming the shifter around but i assure you that syhchros are not the reason that you can't shift from a dead stop. As i said 3 times, reverse doesn't even use synchros so that rules them out anyway.




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djrebelgal80
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Jan 20, 2013, 9:03 PM

Post #22 of 34 (1442 views)
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Re: 1992 CHEVY 4x4 Won't Go In Gear [In reply to] Sign In

Gotcha...after we get the new flywheel tomorrow and see if it works I'll update, especially if that doesn't fix the issue...I'll try to describe what it does so that might help


djrebelgal80
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Jan 22, 2013, 7:20 PM

Post #23 of 34 (1419 views)
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Re: 1992 CHEVY 4x4 Won't Go In Gear [In reply to] Sign In

He's having trouble getting the pilot bushing? (bearing?) back off. When he was stabbing the transmission back in, his cousin hammered it on, and he needs to get it off, and he doesn't want to tear up anything. We have another bearing/bushing to replace that one, he just wants to know how he can get that one off. Thanks!


Hammer Time
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Jan 22, 2013, 7:25 PM

Post #24 of 34 (1414 views)
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Re: 1992 CHEVY 4x4 Won't Go In Gear [In reply to] Sign In

That can be very difficult. Usually what we do is use a slide hammer with a hook on the end of it that you catch behind the bushing.




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djrebelgal80
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Jan 23, 2013, 7:36 PM

Post #25 of 34 (1406 views)
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Re: 1992 CHEVY 4x4 Won't Go In Gear [In reply to] Sign In

Ok he got that fixed. Now having problems putting in the shift forks? We're trying to figure out how they go in, but can't find any diagrams or anything online anywhere! Any links to diagrams would be awesome!




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