ktm Posted March 15, 2008 Share Posted March 15, 2008 I have a 1972 240z with a R180. I just swapped in a 3.70 LSD from an 89 turbo and I have a R200 pinion flange from a 1975 280z as well as the stub axles. The stubs bolt up fine to the half shafts, but my driveshaft will not bolt up to the pinion flange. The inner circle on the driveshaft yolk that rests inside the pinion flange is larger than the R200 female circle. As a result I can not get my driveshaft to bolt up. Anyone else encounter this problem? Quote Link to comment Share on other sites More sharing options...
jeffer949 Posted March 15, 2008 Share Posted March 15, 2008 I just went through this like 3 weeks ago. You need to get an input flang from a 280z with a r200 in it. Its a round flange. If i had an extra one i would send it to ya but i dont. Thats how i actually got my lsd i was swapping out my r200 from my turbo zxt into my my 260 which had the r180. So i went to my friends house to see if he had one and he did but it was on a lsd and was about to take it off and i was like, well how much for the whole thing. He said i $100 bucks and i said sold before he even finished saying it lol. Good luck finding one. Quote Link to comment Share on other sites More sharing options...
ktm Posted March 15, 2008 Author Share Posted March 15, 2008 Ah, I did not see that. I'll just swap out the entire driveshaft. Quote Link to comment Share on other sites More sharing options...
jeffer949 Posted March 16, 2008 Share Posted March 16, 2008 You dont need a new driveshaft its going to be the same as your current one. you need to swap input flanges on your differential. you need one off of 280z with a r200 in it. Quote Link to comment Share on other sites More sharing options...
ktm Posted March 16, 2008 Author Share Posted March 16, 2008 I have swapped the input flange on the R200. It was a round one from the LSD and I swapped in the square one from an R200 from a 280z. The driveshaft will not bolt up. There is a circular recess in the input flange on the diff. This circular recess is SMALLER than the circular protrusion on the 240z driveshaft. The bolt holes are the same dimension apart, but the driveshaft flange will not sit flush with the diff pinion flange. Quote Link to comment Share on other sites More sharing options...
jeffer949 Posted March 16, 2008 Share Posted March 16, 2008 i understand thats the problem i had. did you get the companion flange from an automatic by chance? I was Quote Link to comment Share on other sites More sharing options...
ktm Posted March 16, 2008 Author Share Posted March 16, 2008 As I understand it, nearly all automatic 280zs came with R-180s. I bought an R200 (3.54) for the stub axles and the pinion flange. Now my 240z was apparently an automatic at one point and a previous owner swapped it over to a manual. Saying that, he may have snagged either a 70-71 driveshaft or there may be a difference between the manual and automatic driveshafts. Quote Link to comment Share on other sites More sharing options...
ktm Posted March 16, 2008 Author Share Posted March 16, 2008 Found out my problem. I have a flange from a 1975 R200. This MY 280z is the only year where the flange is not compatible with the driveshaft as the bolt diameter AND spacing is different. I will either need a new flange or a 1975 driveshaft. Quote Link to comment Share on other sites More sharing options...
SATAN Posted March 16, 2008 Share Posted March 16, 2008 Dont know if this will help you but it give dimensions on the z31 components http://www.z31performance.com/forum/viewtopic.php?f=3&t=669 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.