Jon White Posted April 17, 2007 Share Posted April 17, 2007 Ever come accross this before?? I've got a problem in that my series keeps sticking in 4wd. I've had the tin cover plate off the front to check that the selectors aren't sticking (which they arent), and when its parked on the flat it goes in and out of 4wd correctly. However if I jack a wheel up and put a little tension on the driveline via my foot turning the wheel, it stays in 4wd until the tension is released on the wheel at which point the trasnfer box pops back into 2wd. However the problem this casues is that when you go laning for example, you emerge at the end of the lane, shove the lever forward to go back into high range, and spend the next ten minutes bouncing up and down the verge etc trying to get the transfer box to pop back into 2wd! I've not had it apart yet but anyone ever had this before or get any bright ideas? Its definately not sticky selector rods (the usual casue) so the only other thing I can think of is a broken spring inside on the selectors..... Sounds about right? Cheers Jon Quote Link to comment Share on other sites More sharing options...
bill van snorkle Posted April 17, 2007 Share Posted April 17, 2007 Ever come accross this before?? I've got a problem in that my series keeps sticking in 4wd. I've had the tin cover plate off the front to check that the selectors aren't sticking (which they arent), and when its parked on the flat it goes in and out of 4wd correctly. However if I jack a wheel up and put a little tension on the driveline via my foot turning the wheel, it stays in 4wd until the tension is released on the wheel at which point the trasnfer box pops back into 2wd. However the problem this casues is that when you go laning for example, you emerge at the end of the lane, shove the lever forward to go back into high range, and spend the next ten minutes bouncing up and down the verge etc trying to get the transfer box to pop back into 2wd! I've not had it apart yet but anyone ever had this before or get any bright ideas? Its definately not sticky selector rods (the usual casue) so the only other thing I can think of is a broken spring inside on the selectors..... Sounds about right? Cheers Jon Do you have mismatched tyre diameters front to rear? Or maybe a 4.7:1 diff in one end and a Higher ratio ( 4.3, 3.9 or even a 3.54 :1 diff in the other end? The Rover car 4.3 and 3.9 diffs can usually be identified by having a round pinion flange as opposed to the rectangular shaped flange of LandRover diffs Bill. Quote Link to comment Share on other sites More sharing options...
Tonk Posted April 17, 2007 Share Posted April 17, 2007 i go with the broken spring idea inside the t/box. i casnt think of any other cause. Quote Link to comment Share on other sites More sharing options...
Pat Posted April 17, 2007 Share Posted April 17, 2007 If you look on the front of the transfer box. There is a small cap that fits over the end of the box that protects the ends of selector the shafts, they sometimes fill up with carp and rust. take it off and have a look. It looks as though its not coming out of 4wd prpoerly. Is the spring present under the yellow knob? pat Quote Link to comment Share on other sites More sharing options...
Jon White Posted April 17, 2007 Author Share Posted April 17, 2007 Do you have mismatched tyre diameters front to rear? Or maybe a 4.7:1 diff in one end and a Higher ratio ( 4.3, 3.9 or even a 3.54 :1 diff in the other end? The Rover car 4.3 and 3.9 diffs can usually be identified by having a round pinion flange as opposed to the rectangular shaped flange of LandRover diffsBill. Nope - same tyres front and rear and same diffs front and rear (trust me i've changed em often enough lately!) Jon Quote Link to comment Share on other sites More sharing options...
Jon White Posted April 17, 2007 Author Share Posted April 17, 2007 If you look on the front of the transfer box. There is a small cap that fits over the end of the box that protects the ends of selector the shafts, they sometimes fill up with carp and rust. take it off and have a look. It looks as though its not coming out of 4wd prpoerly. Is the spring present under the yellow knob?pat See above - already been there and removed it! They arent siezed. Yes the spring is present. I'll have it all apart (again!) and see whats what inside! Jon Quote Link to comment Share on other sites More sharing options...
ltwt1981 Posted April 17, 2007 Share Posted April 17, 2007 Jon if you need one I have 2 series 2a transfer boxes in the garage. Quote Link to comment Share on other sites More sharing options...
Les Henson Posted April 17, 2007 Share Posted April 17, 2007 Do you have a lot of drivetrain backlash? That can make it easier for the transfer box to 'wind up'. Les. Quote Link to comment Share on other sites More sharing options...
Jon White Posted April 17, 2007 Author Share Posted April 17, 2007 Thanks Nige! I'll let you know. Les, no - very little backlash in it. 24 spline shafts front and rear and recently rebuilt diffs on ARB centres. Props are fine, u/j's are fine. As I say - its been fine for years, its just suddenly started doing it! Jon Quote Link to comment Share on other sites More sharing options...
ltwt1981 Posted April 17, 2007 Share Posted April 17, 2007 Jon thinking about it my brothers was stuck in and he freed it up somehow, I'll have a word, he knows a fair bit abiut them as he served his apprenticeship at 23rd Command REME in Aldershot. Quote Link to comment Share on other sites More sharing options...
Jon White Posted June 19, 2007 Author Share Posted June 19, 2007 Well that was a weird one! Finally got to the bottom of it after I pulled the front diff and counted the teeth! I've somehow managed to pick up a 4.3:1 ring and pinion! God knows what its off and it looks the same as a 4.7 and bolts up the same! My guess is off of a Rover car of some description. You dont want to know how many times I've had the transfer box apart trying to find something wrong with it......sigh! Jon Quote Link to comment Share on other sites More sharing options...
bill van snorkle Posted June 19, 2007 Share Posted June 19, 2007 Nope - same tyres front and rear and same diffs front and rear (trust me i've changed em often enough lately!)Jon Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted June 19, 2007 Share Posted June 19, 2007 Well that was a weird one! Finally got to the bottom of it after I pulled the front diff and counted the teeth! I've somehow managed to pick up a 4.3:1 ring and pinion! God knows what its off and it looks the same as a 4.7 and bolts up the same! My guess is off of a Rover car of some description. It must be a rare prototytpe, get it on eBlag quick! Quote Link to comment Share on other sites More sharing options...
Jon White Posted June 19, 2007 Author Share Posted June 19, 2007 Yeah I know...........that'll teach me to count the teeth to check next time I change a diff! The odd thing was it had a series type prop flange on it just like a normal series one! Mate of mine came up with a good way of checking it though which I'll share:- Put it in 4wd and jack up both wheels on one side of the vehicle. Mark the tyres at the bottom with a bit of chalk, and spin one over 10 complete revolutions returning the chalk mark to the bottom. Then check and see where the chalk mark is on the other tyre. If its not also in line theres your problem! Jon Quote Link to comment Share on other sites More sharing options...
twizzle Posted June 19, 2007 Share Posted June 19, 2007 Yeah I know...........that'll teach me to count the teeth to check next time I change a diff! The odd thing was it had a series type prop flange on it just like a normal series one!Mate of mine came up with a good way of checking it though which I'll share:- Put it in 4wd and jack up both wheels on one side of the vehicle. Mark the tyres at the bottom with a bit of chalk, and spin one over 10 complete revolutions returning the chalk mark to the bottom. Then check and see where the chalk mark is on the other tyre. If its not also in line theres your problem! Jon Jon ive got a series 3 gearbox at my garage if you want it just for 20 squid it can be yours TWIZZLE Quote Link to comment Share on other sites More sharing options...
Jon White Posted June 20, 2007 Author Share Posted June 20, 2007 Jon ive got a series 3 gearbox at my garage if you want it just for 20 squid it can be yours TWIZZLE Thanks for the offer but its no good to me mate as I'm running an LT77! Jon Quote Link to comment Share on other sites More sharing options...
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