That sounds about right. When braking going backwards almost all the weight is pressed upon the drums which have a weaker braking surface area than the front. The fronts also become almost useless because of the chassis' weight transfer. The mass of the car shifts off the front wheels and dives towards the rear onto the poor performing drums. Also make sure your drum adjustment plugs are on preventing any material from gathering inside the drum and shoe assembly. It will leave debris between your drum and shoes while braking, which will make the braking performance of your drums weaker.

Skrilla
'97 Base Talon NA
"Technology is the Only Substitute for Displacment"
"Peace and Turbo Grease"

*Skrilla
"Honest officer, I thought you were trying to race me"
Talon: 1st 2.4L
'97 Prelude
'04 350Z

Originally posted by etx
Good luck man! Project 'STFU Brian your talon is dead meat' should be on it's feet soon!