To see for sure if the trans is a lockup, drop the pan and look on top of the valvebody for the "S" shaped tube about 5/16" diameter (average pencil size). No tube means no lockup. Also, if you have the torque converter off, there is a deep hole (about 1/3 the way up the shaft into the trans) in the middle of the input shaft on lockup trans. Hole is only 2" or so deep on non-lockup. (fluid travels up the hole to the lockup clutch in the converter) As for upshift, 27 mph to drive is normal. Lockup shouldn't engage till 42 mph (and I put the replacement spring in mine to make it lockup at 52 mph for towing). When the lockup was going bad in my Eagle, I dropped the valvebody and put a large (well, about 5/16" diameter) ball bearing in the tube to stop the lockup. In hindsight, I would rather have put an electric lockout I could manually control on the tube so I could keep the fuel economy and freeway speed when I wasn't towing, but I had planned a 727 upgrade anyways. With what I know now, and AW4 would be going in there! (I even have one from a '95 or '96 XJ with only 60,000 kilometers on it sitting on my for sale stuff shelf as I ended up with a motor trans combo I wasn't expecting for my '84 J10) Speaking of AW4, the pilot bearing of my BA 10/5 in my '87 Comanche started jamming last night and I want to get on the auto conversion, but I STILL have the '92 Grand Voyager I've been trying to sell for $200 in the garage I need! (I may end up having to fix it as a backup vehicle tomorrow!) Jim Blair, Seattle, WA '84 J10 Black Jack (getting lifted and stroked!), '73 J4000 304/TH400/QT tow truck http://www.virtualjeep.com AMC list subscription options link http://www.amxfiles.com/amc-list/options.cfm From: Ken Ames <ameskg@xxxxxxxxx> Subject: Re: [AMC-List] Pacer trany To: amc-list@xxxxxxxxxxxx Message-ID: <1162970684.4551863ca1d86@xxxxxxxxxxxxxxxxx> Content-Type: text/plain; charset=ISO-8859-1 The 79 304/998 had a lockup but he 258/904 was locked up in 80. There's no switch needed. It's all internal in the trans - 3rd gear and 30 some MPH. Ken Quoting Sandwich Maker <adh@xxxxxxxxxxxxxxxxx>: >" From: Jim Shadwick <idahoamx@xxxxxxxxx> >" " " 1. Does a 75 258 Pacer have a lockup tranny..... >" " 2. I have a 76 258 with auto attached....not sure what it came out >" of....will it fit...is it a lockup > >i don't think lockups appeared until the early '80s, so your two >trannies should be identical. even so a lockup should be an easy >swap. the only new thing should be the lockup switch. > ________________________________________________________________________ >Andrew Hay _________________________________________________________________ Try Search Survival Kits: Fix up your home and better handle your cash with Live Search! http://imagine-windowslive.com/search/kits/default.aspx?kit=improve&locale=en-US&source=hmtagline _______________________________________________ AMC-List mailing list AMC-List@xxxxxxxxxxxx http://www.amc-list.com/mailman/listinfo/amc-list or go to http://www.amc-list.com