Gearbox problem

[Ashd182]

Fitted second hand gearbox at the weekend,drives fine in all the gears (1-5) but when I but it in reverse it starts to rumble an jumps when reversing.
anyone have same situation that I'm getting?
Cheers

 

[Ashd182]

Any help?

 

[bloke]

had a phase 1 in that did similar and then shat itself!!

 

[Symon]

Engine mounts?

 

[Ashd182]

Do have the solid engine mounts all round except for the lower gearbox mount would requesting them help?, An it only seems happen coming from passenger side as well that it rumbles an jumps

 

[Symon]

If you have solid mounts the problem is probably less likely. I was thinking you may have worn ones, but it doesn't sound like it is the case.

 

[Ashd182]

Not really sure what else can try really as not a lot it can be