It may not be the motor. It could also be the trans (especially if it's a lockup) "hunting" in and out. 5 mph higher or lower will make the surge go away. You can cure the trans issue with a spring kit that will make it lockup at a higher speed. You have to drop the valvebody in the trans (that I recall. Been awhile since I did one in my FSJ) I'll be doing one soon in the 727 I'm putting in my Eagle. Jim Blair, Lynnwood, WA '87 Comanche, '83 Jeep J10, '84 Jeep J10 From: Keith Evenson <epd@xxxxxxxxxxxx> To: "AMC, Rambler, Nash, Jeep and family" <amc-list@xxxxxxxxxxxxxxxxx> Subject: [AMC-list] 360 issue Message-ID: <C55DD39A-103A-45F2-A8F8-51C2E972F873@xxxxxxxxxxxx> Content-Type: text/plain; charset=us-ascii I have a 360 in my 70 Jav it was rebuilt about 5 years ago. It is just a good street engine with electronic points and an aftermarket intake and holley carb. and a 770 trany. What it seems to be doing is when I am driving in town or at about 30 - 40 mph it seems to have a pulsing in the engine. It may be doing it at road speed but it is not nearly as noticeable. Sometimes I notice my tach moving with the pulsing. If I drop it into 2nd it seems to go away. So in 3rd gear at lower speed is when I have the issue. Seems like it might be an electric issue. Any ideas? Thanks, Keith -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://list.amc-list.com/pipermail/amc-list-amc-list.com/attachments/20110804/bc1087bd/attachment.htm> _______________________________________________ AMC-list mailing list AMC-list@xxxxxxxxxxxxxxxxx http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com