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trizo
Forum Moderator
3091 Posts
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 Posted - 05 Aug 2006 : 11:09:15 PM
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hey guys and gals got a problem, here it goes...the gear box in my vn dosent like to change gear in the morn wen u go to take of it will revit guts out in first until about 43-45kph then wak in she goes then i have second to deal with and this will change at about 65kph once the oil warms up it will change as normal but then tere are huge flat spots or loss of power as such.this is realy giving me the sh#ts dont get me wrong it goes into all the other gears just fine i also just repaced all the rad and hoses thinking this may help the oil heating to the gearbox i may be wrong!I do have a spare here but rather than pull this out and replace i thought sum1 might have a few ideas,this has me stumped!!!!!!!! 
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lolo
Fully Licenced
503 Posts
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Posted - 06 Aug 2006 : 12:24:26 AM
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| mate this is a quite common problem but my theory is (and I'm putting this in practice with my VN).... drive it till the box goes, and then replace it with a very strong, high performance box.... |
Marcus Rogulic R.I.P (1980-2007)
"The Good Die Young" |
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trizo
Forum Moderator
3091 Posts
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Posted - 06 Aug 2006 : 12:31:08 AM
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| ye mate thats my thought exactly Vn minds thinkin alike.cheers |
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trizo
Forum Moderator
3091 Posts
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Posted - 06 Aug 2006 : 01:48:00 AM
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any other ideas any1?
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mouce
National Driver
1525 Posts
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Posted - 06 Aug 2006 : 10:06:34 AM
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To be honest it just sounds like it needs a good service. It sounds like some of the internal seals have started to harden, and they don't let the lines come up to pressure quickly enough, which means that the gear changes are rather sloppy, and the engine spends a bit of time free revving in between gears.
It could also be that the torque converter is not locking up the way it's meant to. Which would explain the flat-spots in acceleration, because even though you've got the foot down, it's not locked properly, which means that it's slipping a bit, so there are wasted revs.
Change the fluid in it (if you didn't do it when you did the radiator swap), see of that goes. Otherwise I'd say that it's time to look at a big service, or even a rebuild (with a stage 2 shift kit of course). Either that or save your pennies and go for a manual conversion. |
Bite off more than you can chew, and chew like hell - Peter Brock (1945-2006) |
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trizo
Forum Moderator
3091 Posts
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Posted - 06 Aug 2006 : 12:20:27 PM
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| eyah thats sumthing that i dindnt even consider i might change the oil to c if it makes a difference but i still dont want take motor out 2 service gear box thanx for your thoughts mouse i will haf loook and let uknow cheers............. |
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mouce
National Driver
1525 Posts
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Posted - 06 Aug 2006 : 10:59:45 PM
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You don't have to pull the motor out to do the gearbox service. You can drop both the auto and the manual boxes out and still leave the engine in the car.
When it comes to working on VN's you have to remember that they are not state of the art technology...they are getting on to 18 years old (mine is anyway), and when something goes wrong, it's often the simple things that you should check first. |
Bite off more than you can chew, and chew like hell - Peter Brock (1945-2006) |
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trizo
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3091 Posts
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Posted - 06 Aug 2006 : 11:26:31 PM
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| I relise on most cars u dont haf to take motor out to drop box but arn't these supose to realt tricky? |
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mouce
National Driver
1525 Posts
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Posted - 07 Aug 2006 : 7:27:59 PM
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| No harder or easier than any other car that I've ever known. Actually...it's easier than a couple because there's so much space under there. |
Bite off more than you can chew, and chew like hell - Peter Brock (1945-2006) |
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trizo
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3091 Posts
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Posted - 07 Aug 2006 : 8:13:55 PM
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| ok ok I haf been told theres a little rod that goes into your drive plate and this is wat causes problems wen takin out cause if not done right this rod can bend and then its back 2 square1 I'm also guessin that the car has to b a fair bit off the ground and I certainly dont have a hoist in my bak shed p.s sorry to b ignorant....... and thanx 4 the feed |
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mouce
National Driver
1525 Posts
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Posted - 08 Aug 2006 : 09:01:24 AM
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Oh yeah, that little rod is there, but so long as you're aware of it, there's no problems. You just have to unbolt things and slide them apart rather than unbolting them and 'dropping' the gearbox out. Once it's all clear you can just drop it like normal.
I'm wishing I had a hoist in my shed, damn that would be nice...oh well...when I'm rich and famous :)
You do need a fair bit of room under the car, but nothing that a good trolley jack and axle stands shouldn't be able to get you, though a hoist would be nice. |
Bite off more than you can chew, and chew like hell - Peter Brock (1945-2006) |
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trizo
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3091 Posts
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Posted - 08 Aug 2006 : 7:25:10 PM
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| cheers mouse my mate!!! I knew u would know, so as long as its clear there should not b any damage to the rod wen i drop it?And yeah bud a hoist oh wat a dream that would be life would b so much easier lol,any thank again mouse>>>>>>>>>>>>>>>>.................... |
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mouce
National Driver
1525 Posts
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Posted - 08 Aug 2006 : 10:26:29 PM
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Actually, if you're going to go nuts with dropping gear boxes and stuff, get a Gregory's manual, or a Haynes one. Either way they have handy little photo's in them that show just where everything is and how to do it all properly.
BTW: there's no 's' in the name, it's a 'c' on purpose :) |
Bite off more than you can chew, and chew like hell - Peter Brock (1945-2006) |
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trizo
Forum Moderator
3091 Posts
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Posted - 08 Aug 2006 : 11:01:29 PM
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| oooppppsss my bad beer googles bud bear with me hehehehehehehehehe!!!:) |
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