diff --git a/ebos/ecltransmissibility_impl.hh b/ebos/ecltransmissibility_impl.hh
index ee7caf30b..2d9580631 100644
--- a/ebos/ecltransmissibility_impl.hh
+++ b/ebos/ecltransmissibility_impl.hh
@@ -352,11 +352,8 @@ update(bool global, const std::function<unsigned int(unsigned int)>& map, const
                                               axisCentroids),
                               permeability_[outsideElemIdx]);
 
-            auto coarseElemIdx = lookUpData_.template getFieldPropIdx<Grid>(elemIdx);;
-            auto coarseOutsideElemIdx = lookUpData_.template getFieldPropIdx<Grid>(outsideElemIdx);
-            
-            applyNtg_(halfTrans1, insideFaceIdx, coarseElemIdx, ntg);
-            applyNtg_(halfTrans2, outsideFaceIdx, coarseOutsideElemIdx, ntg);
+            applyNtg_(halfTrans1, insideFaceIdx, elemIdx, ntg);
+            applyNtg_(halfTrans2, outsideFaceIdx, outsideElemIdx, ntg);
 
             // convert half transmissibilities to full face
             // transmissibilities using the harmonic mean
@@ -474,8 +471,8 @@ update(bool global, const std::function<unsigned int(unsigned int)>& map, const
                                                         axisCentroids),
                                         porosity_[outsideElemIdx]);
 
-                applyNtg_(halfDiffusivity1, insideFaceIdx, coarseElemIdx, ntg);
-                applyNtg_(halfDiffusivity2, outsideFaceIdx, coarseOutsideElemIdx, ntg);
+                applyNtg_(halfDiffusivity1, insideFaceIdx, elemIdx, ntg);
+                applyNtg_(halfDiffusivity2, outsideFaceIdx, outsideElemIdx, ntg);
 
                 //TODO Add support for multipliers
                 Scalar diffusivity;
@@ -500,7 +497,7 @@ update(bool global, const std::function<unsigned int(unsigned int)>& map, const
     // Loop over all elements (global grid) and store Cartesian index
     for (const auto& elem : elements(grid_.leafGridView())) {
         int elemIdx = elemMapper.index(elem);
-        int cartElemIdx =  this->lookUpCartesianData_.template getFieldPropCartesianIdx<Grid>(elemIdx);
+        int cartElemIdx =  cartMapper_.cartesianIndex(elemIdx);
         globalToLocal[cartElemIdx] = elemIdx;
     }
 
@@ -1043,7 +1040,7 @@ applyNncMultreg_(const std::unordered_map<std::size_t,int>& cartesianToCompresse
     const auto& inputNNC = this->eclState_.getInputNNC();
     const auto& transMult = this->eclState_.getTransMult();
 
-    auto compressedIdx = [&cartesianToCompressed, this](const std::size_t globIdx)
+    auto compressedIdx = [&cartesianToCompressed](const std::size_t globIdx)
     {
         auto ixPos = cartesianToCompressed.find(globIdx);
         return (ixPos == cartesianToCompressed.end()) ? -1 : ixPos->second;