[V8] Replacement Battery and strange rumbling

[Ed Dekker]

"what to use for a replacement battery"
    I use Interstate batteries and get them at a discount from the wholesale 
outlet.  They fit perfectly, have the all-important vent connection and 
include the plastic insulators to prevent a short circuit to the rear seat 
cushion frame.
    Sorry, I'm no help on the rear end noise

Ed Dekker
90 V8 graphite
97 V6 Avant Pearl