whiine new 373
07-31-2012, 03:18 PM
#43
You test the pre-load with 125-130 FT-LBS of torque. Also remember you get a true pre-load reading with a spacer a crush sleeve is always going to give you a wrong pre-load reading. But in most cases it is factored in by the manufacturer. Pre-load is very critical. Also the carrier pre-load is very critical also. And basically no one checks that. Once again setting up a final drive is not something easy. You need special tools and techniques and everything has to be checked and rechecked.
Also the parts have to be checked very closely. Here is a carrier unit from a final drive that went wrong!! The so called rear end specialist missed the fact that the carrier bearing spun on the posi unit housing. This caused a premaaature wear issue and destroyed the final drive. Make sure all parts are inspected closely and miked for clearances including the interference fit of the carrier bearings. THEY ARE NOT ALWAYS IN SPECK!!!
Also the parts have to be checked very closely. Here is a carrier unit from a final drive that went wrong!! The so called rear end specialist missed the fact that the carrier bearing spun on the posi unit housing. This caused a premaaature wear issue and destroyed the final drive. Make sure all parts are inspected closely and miked for clearances including the interference fit of the carrier bearings. THEY ARE NOT ALWAYS IN SPECK!!!
Last edited by tom falco; 07-31-2012 at 03:33 PM.
07-31-2012, 03:41 PM
#45
Actually i feel it with my fingers. Or by the book you add app .006-.012 to your zero pre-load reading. With a spanner type axle it is zero plus 2 notches. Their are many different specks for different axles. Also below is self explanatory. Maintain you service intervals on that final drive. Frequent oil changes is a good insurance for a quiet running final drive. I have a book on specks that i made over the years for setting up final drives. Every one is different than the next
Last edited by tom falco; 07-31-2012 at 03:52 PM.
08-13-2012, 01:02 PM
#47
Tom, I really hate to start an argument, but take it from someone who has set up well over a hundred differentials in my life...002 to .003 is WAY to tight on these cars for a street driven vehicle. If you don't believe me, get one nice and hot, then pull the cover and see what you have. I'm actually surprised to see you get away with that.
