JCB 3CX stuck in reverse

[breathtaker]

I have an old grey cab 3cx with the shuttle lever to left of steering wheel. I had noticed it a bit sticky when coming out of reverse over last few days but perfectly smooth into reverse and in and out of forward. It has now stuck in reverse. Completely solid, won't move. Still driving perfectly in reverse and changing gears. Any ideas what the problem is

 

[Goweresque]

I think they have separate forward and reverse clutch packs, so could be the forward clutch pack has gone. Or the solenoid that controls the forward clutch.

 

[breathtaker]

Thanks. I have zero mechanical knowhow. I take it the former is an expensive fix? Is the solenoid a fairly simply fix?

 

[fieldfarmer]

Thanks. I have zero mechanical knowhow. I take it the former is an expensive fix? Is the solenoid a fairly simply fix?

Have a look underneath, could it be the detent on the big washer tipe thingy that the cable spins has becom stuck.

 

[breathtaker]

Thanks for help.
just for info for anyone who finds themselves in similar situation. It turned out to be a very simple fix. Simple a new cable from lever All working fine again

 

[agrimax]

Grey cab models didn't have a cable. Must be a white or early black cab...

 

[breathtaker]

It’s def has a grey cab and we replaced the cable. But I am interested in what you are saying. Would you know from the axle number?

 

[breathtaker]

Any of this shed any light in the model ?
3cx-4 309611/p/s
977789/L
01337
Gearbox serial 13027/984/4941
T&c serial 43086
Rear axle 00528

 

[agrimax]

On the JCB parts finder,your serial number isn't recognised in the search box but in the models menu it is in the range of a 3D from 1987-88. I've seen this before on a machine (grey cab)that had 3CX on the mudguards and also 3CX 4 on the id plate but to find part numbers for it I had to go into the 3D listings.Don't know why JCB did this but afaik,a 3CX sitemaster is identical to a 3D with extending dipper anyway.
It's strange though,that your shuttle is cable operated as it was used on the older Borg Warner transmissions on white and early black cabs. Synchro Shuttle came in then and followed on to the grey cabs and beyond and had a yellow stalk/switch on the lhs of the steering column which operated 2 solenoids on top of the transmission.
Is there a chance the cab has been changed on your machine? Or any chance of a picture?

 

[breathtaker]

Thanks for all the info. Much appreciated. I’ll get a pic tomorrow. Might have to learn how to post it though

 

[essexpete]

Picture underneath of the transmission would be good.