Brer Mark Hofmann wrote to Brer Roy Witt about Re: Transmission rebuild.:   
      
      
      
    RW>> Yes, it has 4, two before the cat and two after. Dual Exhaust, you   
    RW>> know. We found that one of the after cat sensors was the one   
    RW>> signaling the computer to err, but it checked out as good in up   
    RW>> close testing.   
      
    MH> My daughter's old car had a similar issue with the O2 sensor after   
    MH> the cat. In her case, however, the cat was probably not functioning   
    MH> as good as it should have.   
      
    MH> To save spending a fortune on a new cat, I bought offsets for the O2   
    MH> sensor after the cat.  That allows it to still get a reading, but not   
    MH> as much as being directly in the flow.  They are used for people that   
    MH> remove their cats, but don't want a check engine code up all the   
    MH> time.  :)   
      
   The LS1 Camaro guys would use something similar that would allow their   
   cars to pass California smog checks. They'd replace all O2 sensors with   
   them, which would satisfy the ECM's need for a certain range of oxygen   
   content.   
      
    RW>> Be sure you check which engine the later models have. The 97 still   
    RW>> had the 5.7L, while the 99 could have either the 5.7L or the new for   
    RW>> 99, 5.3L LS engine. GM got pretty close to perfection on the 97-98   
    RW>> fuel injection, then switched to the new design in 99 and full on LS   
    RW>> engines after that. My high school buddy in Illinois bought a 2007   
    RW>> Tahoe and it came with the smaller size 4.8L LS, the same one that's   
    RW>> in my 02 Silverado. He tows a boat and trailer and was disappointed   
    RW>> that it downshifted to 3rd on hills.   
      
    MH> In this particular case, it was the 5.7L.  They have both a 97' and   
    MH> 99' at the local auction and they are still there.  $1900 for the 97'   
    MH> and $2100 for the 99'.  I was tempted on the 99', but the A/C wasn't   
    MH> functioning. Everything else checked out.   
      
   My next door neighbor just parked his 08 Chevy duramax and bought a daily   
   driver, an 02 2500HD. It's AC wasn't working, so his dad or FIL came over   
   and helped him replace and clean the system. The compressor had exploded   
   internally and filled the system with junk. Not a hard job, just hard to   
   get to. They removed inner fenders and wheels to get to the compressor.   
      
    RW>> All Girls Garage pointed out that the Toyota Tundras have the same   
    RW>> problem. They blamed the blower motor speed resistor, which is   
    RW>> probably your Durango's problem too.   
      
    MH> Yes, it is a very common problem with them.  Last time I went to a   
    MH> junk yard just looking for a few items, you could see where the   
    MH> Durangos and Dakotas had their resisters, wire harness, and blowers   
    MH> stripped already.  I had finally located one way in the back that   
    MH> still had the wire harness, which I cut out to remove and installed   
    MH> in our Durango.  The old one had melted and fused together really   
    MH> bad, enough to short wires.   
      
   8^) I had a 150amp Tig welder in my shop that did that to the power lines   
   and blew the utiliy company's 100 amp fuse. The welders found a   
   replacement fuse and blew it again when they tripped the breaker. This   
   happened while we were in AZ on a well needed vacation. When I got back   
   to the shop, 4 days later, I removed the wiring from the breaker box and   
   found that the line was melted together and probably touching the   
   conduit. I pulled some new wires through the conduit and all was well   
   again, but I wouldn't allow the welders to use that welder on any heavy   
   jobs again.   
      
      
            R\%/itt   
      
      
      
   --- Ya have ta ask yourself: What Would Roy Witt Do?   
    * Origin: Lone-Star BBS - San Antonio, Texas - USA  (1:387/22)