Locking up when reversing

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monty892

New Member
Posts
15
I have a problem with my ex-military 88" CL series 3 and I'm just wondering if anybody has any ideas. It will reverse fine, except when I dip the clutch, the back wheels lock up - this effect is more severe/pronounced, the faster I am going. It feels as if it's winding-up. I have checked that it's not stuck in 4wd, I have had the drum off the transmission brake and it still does it - I've had the rear drums off to check nothing is dragging - all okay. I can only think the problem must lie in the diff or the gearbox. It's not making any strange noises and the transmission in general (apart from the clutch) seems to be in good nick. I'm thinking that maybe I should disconnect the propshaft and have a look at the output from the gearbox - hopefully this would point to where the problem is. This is driving me mad - has anybody else had a similar problem? I would be most grateful of any suggestions.
 
check the gearbox output shaft nut in the transfer box.
can see it thru top cover on transfer box, but to nip it up you need the bearing housing off from the back of the transfer box. its a round castlated nut and needs a special tool to nip it. (which can be made)

mine did this when i playing on me mates street (steep hill), comin down backwards in low box and bouncing the clutch. nut wound itself off shaft and locked itself up against bearing housing. bit embarrasing in middle of street as i did it good enough to prevent all movement unless in first low with fairly high revs.
 
Hmm, have you done any work on the rear brakes recently? My fronts sometimes locked in reverse after I replaced the shoes. Chamfering off the top and bottom edges of the shoes and slackening off the adjusters a click helped.
 
Thanks nrgserv,
I'll have a look at this at the weekend and let you know how I get on! No sure my garage skills will run to making a tool - but I'll give it a bash if needed.

I had forgotten to introduce myself - have done it now!

Thanks Oxides,
I did take the brakes apart this weekend and backed off the adjusters. I didn't chamfer the shoes though. Interestingly, it doesn't seem to lock it if it's rolling backwards out of gear, which has led me to think it must be a transmission problem?
 
Thanks nrgserv,
I'll have a look at this at the weekend and let you know how I get on! No sure my garage skills will run to making a tool - but I'll give it a bash if needed.

I had forgotten to introduce myself - have done it now!

Thanks Oxides,
I did take the brakes apart this weekend and backed off the adjusters. I didn't chamfer the shoes though. Interestingly, it doesn't seem to lock it if it's rolling backwards out of gear, which has led me to think it must be a transmission problem?

Yeah, looks like it - good luck!
 
The gearbox output nut was fine. I disconnected the prop, ran it in gear and there was no binding - so it looks like it's the diff - I was going to take it out but was thwarted by a stripped drive flange bolt - so I will have to wait and tackle that another day. By the way, does anyone know how I accurately identify the diff and is there a serial number stamped on it somewhere. I think it's a Salisbury (it has a circlips on the halfshaft flanges).
 
Hi nrgserv,
I've only just seen your post about the tool - thanks for the offer, although looks like I won't be needing this time.
 
I think it's a Salisbury (it has a circlips on the halfshaft flanges).
bugger!
thats gonna be cnut to do!
never bust a salisbury, but do know you need a stretcher tool to get the diff out of the housing!
good learning curve coming up, will keep watching.
gizza shout if you need a hand, or morale support.

edit
salisbury axle has a removable diff pan on the arse end of the axle.
standard rover axle has bolts on front side of axle where the entire diff comes out.
 
Last edited:
Yes, that's exactly what I thought!
I was aware of the stretcher tool thing - but I don't think it has the removable diff pan, so it might be a Rover?
Thanks for the offer of support.
Brian
 
Thanks nrgserv, I really appreciate the offer. Looking at the pics, I think it may be a Rover type - I don't think I'll be able to properly check it before the weekend. I'm going to try welding a bar onto the flange nut to try and pull it while turning!
I'll keep you posted!
 
Thanks nrgserv, I really appreciate the offer. Looking at the pics, I think it may be a Rover type - I don't think I'll be able to properly check it before the weekend. I'm going to try welding a bar onto the flange nut to try and pull it while turning!
I'll keep you posted!
put a crowbar under the drive flange and pivot it on a wheel nut. (nearest to bolt that wont come out). apply pressure while unscrewing bolt.
 
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