4x4 stuff
Lead Driver
Joined: May 2007
Posts: 8,608
Likes: 13
From: Belair md
the t-case is not syncronized, unless the front and rear axles are spinning at the same speed it will grind like a *****. a shift on the fly you could engage the t-case with the rear spinning.
Fleet Mechanic
Joined: Aug 2007
Posts: 1,508
Likes: 2
From: The boonies by Dallas OR
OK, some mechanical definitions here: A clutch can be an interference clutch or a friction clutch. You're putting on the limited definition to only call a friction clutch a clutch. But interference clutches are also a clutch. They may be called dog clutches, spline clutches or jaw clutches. But they work on the principle of only being positively engaged or freewheeling. There's no in between. Attempting to engage without matching the speed will grind them. Manual hubs are clutches, the rage selector is a clutch, as are the selectors in a manual transmission that pick the gear. It just so happens that in most manuals, there's also a cone clutch, also known as a synchronizer that makes the speeds match before the jaw clutch engages.
Hotshot
Joined: Oct 2003
Posts: 17,799
Likes: 104
From: Ashland City, TN
I thought you were referring to shifting while moving forward.
Hotshot
Joined: Oct 2003
Posts: 17,799
Likes: 104
From: Ashland City, TN
OK, some mechanical definitions here: A clutch can be an interference clutch or a friction clutch. You're putting on the limited definition to only call a friction clutch a clutch. But interference clutches are also a clutch. They may be called dog clutches, spline clutches or jaw clutches. But they work on the principle of only being positively engaged or freewheeling. There's no in between. Attempting to engage without matching the speed will grind them. Manual hubs are clutches, the rage selector is a clutch, as are the selectors in a manual transmission that pick the gear. It just so happens that in most manuals, there's also a cone clutch, also known as a synchronizer that makes the speeds match before the jaw clutch engages.
If there are gears or splines involved, they have a different name, and its not a clutch. Per my knowledge anyways.
Posting Guru
Joined: Aug 2007
Posts: 1,601
Likes: 0
From: Cato Arkansas
ok kinda off the subject but the other day i was pulling a trailer full of concrete and rock and had to put it in 4x4 to get the trailer to the dump spot i was in first with the 4x4 locked in and i was going good until i heard a pop and the front tires quit turning so i looked under the truck the front driveshaft was working looked at all the u joints none where broke checked the hubs both said locked so i tried again still no front tire spin i was pissed at this point because my boss with a chevy was gonna have to pull me out so i unlocked and locked the front hubs back in and the front started spinning again but at this point i had done dug the back tires in a hole i wasn't going no where with that trailer hooked to it so my boss had to pull me out but what could make the front hubs unlocked so no more cheap chevy v6 base model truck has to pull out a PSD
Fleet Mechanic
Joined: Aug 2007
Posts: 1,508
Likes: 2
From: The boonies by Dallas OR
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Post Fiend
Joined: Mar 2007
Posts: 9,010
Likes: 5
From: Johnson City, TN.
Sounds like a hub busted. You might have wiggled it enough when you disengaged it and re-engaged it to make it grab again. I would start there before I went in the Diff.
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