The DeLorean uses a 3.44:1 final drive which is longer legged than the version you mention for the GT40 replicas. 3.8:1 and 4.1:1 are lower gear ratios. The 4.10:1 is quite low. 4.11:1 is used in many four wheel drive trucks here in the states when a lot of grunt power is needed off the line.. As for the GT40's, I remember reading about some fellows in Pennsylvania importing the kits into the states several years ago. I believe they used Ford 351 Cleveland engines in them so UN1 transaxles must have stood up reasonably well with high torque engines and lower final drives. Also, there must have been a source of bellhousing adaptors for small block Ford V-8's to mate with the Renault trannys. Bruce Benson > The GT40 replicas use a "long legged" final drive to >give a good top > speed - which bears out what I've been saying about >the final drive > being the key. All the performance Renaults using the >UN1 or 369 have a > 3.8:1 or even 4.1:1, and they never break... > Martin > DMUK To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/