The Jeep T-176 is an iron case with an aluminum top cover. Wheelers here in Michigan run them behind 401's without hesitation. -Spro -----Original Message----- From: amc-list-bounces@xxxxxxxxxxxx [mailto:amc-list-bounces@xxxxxxxxxxxx] On Behalf Of Sandwich Maker Sent: Monday, July 06, 2009 1:01 PM To: amc-list@xxxxxxxxxxxx Subject: Re: [AMC-list] T176 my 2c: the t176/7/8 are ford toploader designs, i believe with aluminum cases. back in the '60s, ford had a close-ratio iron case model considered beefy enough for 427s and 429s. tremec has 5sp derivatives rated up to 600 ft-lbs. one of the nascar trannies [jesel?] is based on the toploader, though everything is custom. magnesium cases... as it is, use with the 360 in a truck suggests the t176 rating must be approaching 400 ft-lbs. putting the guts in an iron case would help, and using the 31-spline bbf mainshaft for 2wd would also. in the '80s, ford was putting o/d toploaders [with low-mid 3s for 1st] into their pickups, but i don't know offhand with what engines or whether iron or aluminum cases. jeep gears are popular with ford rodders seeking wider ratios for their toploaders. the t18 etc are of course stronger - they're designed for medium duty trucks. the engines aren't bigger but they see a lot more full throttle action, all day, every day. ________________________________________________________________________ Andrew Hay the genius nature internet rambler is to see what all have seen adh@xxxxxxxxxxxxxxxxx and think what none thought _______________________________________________ AMC-list mailing list AMC-list@xxxxxxxxxxxx http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com _______________________________________________ AMC-list mailing list AMC-list@xxxxxxxxxxxx http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com