BeepsUSA

So on a limited budget I’m trying to upgrade a bit on my 1993 defender 90. First I’ve recently returned from a off road weekend and was a bit humiliated having to be winched up a few very slippery/muddy hills while everyone else was making it with ease. I’m considering lockers but on a limited budget $1,500 I have been told to consider on rear lockers and upgrading axles and purchasing new or used tires. Any thoughts or if anyone has anything for sale to help, would be much appreciated.