Ford case T5's traditionally has a short input shaft. Except for the 94-98 (SN95 model) which is ~5/8" longer... Oddly, those years also use a 26 spline clutch.
I'm thinking it may be a GM input shaft in a Ford case. Would the longer input shaft be enough to get the pilot shaft, with a sleeve to adjust diameter of course, well and truly in the pilot bushing?
I'm not impressed with extending the pilot bushing and adding lightness by shortening the hollow sleeve would be a stronger end result.
Last edited by oldejack; 12-19-2017 at 02:27 AM.
Short answer, not a GM shaft in a Ford case. FWIW, most older Ford transmission input shafts were either a big block 6" or small block 6.25". The Studebaker is 7.50". Adding .625" to either still requires an extended pilot bearing.
There are three lengths of Ford T5 input shafts.
83-93 V-8,
94-04 V-6 /94-95 V-8, - .6875" longer than the 83-93 V-8.
4-cyl. - .25" longer than the 83-93 V-8 shaft and has a different diameter pilot bearing
jack vinesFrom left to right are the six T-5 input shafts—Chevy S-10 14-spline, Chevy S-10 26-spline, 2.3L four-cylinder Mustang 10-spline, 3.8L and 5.0L Mustang 10-spline, 3.8L and 5.0L 10-spline 1994-2004 Mustang, and the Camaro 26-spline. The 1994-2004 input shaft is longer due to shifter placement in the SN-95 Mustang, which calls for a specific bellhousing that is deeper to move the transmission aft.
PackardV8
If you eliminate the T5 adapter by welding upper mounting "ears" on the V8 bell housing, and reducing the diameter of the input shaft bearing carrier to match that of the bell housing, the 83-93 T5's will engage with the V8 crankshaft. This allows the use of the Ford pilot needle bearing without it's carrier. It is a nice .001" interference fit in the crank pilot bore.
The GM T-5 went to the traditional Ford mounting pattern in1993. So,if you are seeing a Ford bolt pattern and suspecting a GM input shaft ... .
"All 1993 and up GM cars with the T-5 used the Ford bellhousing bolt pattern, and not the earlier GM pattern. The 1993 and up GM applications were limited to V-6 Camaros/Firebirds, as the option was not offered in the V-8s. You can identify these transmissions by the 26-spline GM input shaft with a Ford bolt pattern."
Top of page from a Google search word: t-5 ford bolt pattern gm
'64 Lark Type, powered by '85 Corvette L-69 (carburetor), 700R4, - CASO to the Max.
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