getZ Posted October 7, 2005 Share Posted October 7, 2005 I couldn't find any info on an easy way to check the driveline alignment in the horizontal plane when swapping in a v-8. I can see using a bubble level to check alignment in the vertical plane, but how do you check it in the horizontal plane with out any special equipment. I thought about putting a flat surface on both ends (tranny and diff) and hanging a plumbers bob at all four corners (two back and two front) but I wasn't sure how accurate that would be. Anybody got any ideas? Quote Link to comment Share on other sites More sharing options...
VinhZXT Posted October 7, 2005 Share Posted October 7, 2005 Everyone got their own ways of doing this but here is what I did to mine. I make several measurements of the stock driveline at various points: 1. From the center of the crankshaft to the frame rails and center of crankshaft to the top of the frame rails.2. From the driveshaft to the top of the tunnel and sides of the tunnel at various points along the driveshaft. This is because you don't know how long the newer driveline will be. Then when you put the new driveline in and try to get it to stay parallel to the old driveline as possible (horizontal and vertical). On my LS1 I got it dead on with the old driveline (on the horizontal plane). Since the crankshaft of the V8 is sitting lower (1 1/4") than the stock crank (L6) I will have to lower the rear the same amount. I have the same part car here with the stock driveline in it and that helps alot. I posted a question about this awhile back so do a search. Good luck Quote Link to comment Share on other sites More sharing options...
getZ Posted October 7, 2005 Author Share Posted October 7, 2005 I was a little hesitant to use the frame as a reference because I wasn't sure it was exactly parallel, but it is probably good enough. Of course, this method also assumes the rear differential is also parallel to the frame. What did you title the thread you mentioned? I searched for a while, but decided to press the easy button hoping someone would have something easy. Your solution sounds like it will work. Quote Link to comment Share on other sites More sharing options...
VinhZXT Posted October 8, 2005 Share Posted October 8, 2005 Here it is http://forums.hybridz.org/showthread.php?t=100553 Sorry I was using another handle that time. Quote Link to comment Share on other sites More sharing options...
BrandonsZ Posted October 11, 2005 Share Posted October 11, 2005 On my LS1 I got it dead on with the old driveline (on the horizontal plane). Since the crankshaft of the V8 is sitting lower (1 1/4") than the stock crank (L6) I will have to lower the rear the same amount. I have the same part car here with the stock driveline in it and that helps alot. I posted a question about this awhile back so do a search. Good luck Why do you have to lower the rear? As long as the planes are parallel you should be fine with 1-2" offset in ceterline. Quote Link to comment Share on other sites More sharing options...
VinhZXT Posted October 12, 2005 Share Posted October 12, 2005 oops... I meant the rear of the transmission not the rear differential. Thanks for the correction. Quote Link to comment Share on other sites More sharing options...
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