T-10 in a Stude --------------- There are several factors that must be considered in swapping T-10s/or other perf. 4 spds as there were major differences between the different OEM applications. But in a word there is no direct interchange for the Stude (but neither is there between AMC, Chrysler, Ford or GM as each OEM specified different dimensions on items I will list for you icw 4spds only). 1: trans bolt pattern (Stude T-10s either have the GM[early Stude 61/62] or Ford pattern[late Stude 62, 63/64......but don't get excited yet) 2: Input shaft length strictly unique to Stude approx 7 1/2 in.(GM & Ford are shorter approx 6 1/2 to 6 5/8; AMC & Chrysler are longer approx 8 1/2) 3: Input shaft pilot diam. Stude is .750" , AMC & Chrysler are the same (Chrysler V8s[perf-era 60-74] use same pilot bearing/bushing as Stude) 4: Clutch spline size 1 1/8 x 10 used by Stude, AMC & early GM [early Fords used 1 1/16 x 10 they look the same but are not] ) but changing to a different clutch spline is not of itself a major problem 5: Brg retainer diam Stude uses 4.675; AMC uses 4.677; GM uses 4.683, Ford uses 4.849; Chrysler A-833 uses 4.353 SB, 4.807 BB&Hemi & 5.125 with their OD 4 spd (used in mid 70s); also these brg retainers do not necessarily interchange due to different diameters of the input shafts and bolt pattern on case 6: diameter of the TO brg sleeve of the brg retainer is unique to Stude which used 1 1/2" next closest are the AMC & BB Chrysler at approx 1 7/16" 7: Output spline/slip yoke Stude uses 1.5 x 16, most common was 1.5 x 28 used by early Ford and GM, AMC uses 1 9/16 x 28, this output spline info applys only to T-10s. Variety of slip yokes for T-10s are still available from Spicer. This should give you a quick overview of some of the basic differences and an idea of what has to be overcome/re-engineered to do a swap. For what it's worth the AMC T-10's top two mouting holes match the Stude Ford style bell hsg with plenty of area left to redrill/tap for the bottom two and the brg retainer pilot diam is close enough to work with no problem (but you're still stuck looking for an orphan T-10 although they are easier to find than Stude T-10s and there were quite a few super T-10s made for AMC. The AMC input shaft can be shortened by a competent machine shop with the special equipment/tooling for modifying 8740 heat treated steel but this requires tranny disassembly which discourages most people. There is an excellent article on doing a T-5 swap on the SDC website under tech files listed as 5-Speed Fix. josephcv66@aol.com (Josephcv66) Sep 2001 -------------