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Old 06-01-2006, 01:59 AM
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Home Made Tranny Adapter

I am working installing a Tremec 5 speed ( Borg Warner T-5 ) in place of a Borg Warner T96-1A. Thats the stock unit from a Studebaker Champion with overdrive.
That dimensions and numbers tell me that this should be a straight forward swap.
However, locating the 4 mounting flange bolts in the right place after
the recess for the mainshaft bearing support has been milled in place has me baffled.
I could use the old transfer punch method but I would like to be more precise than that.
Any ideas or suggestions would be a great help. I am in no position to pay a machine shop the many hundreds of dollars that they want for this work.
Thanks

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Old 06-24-2006, 10:48 AM
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Well . . . . . the machine shops charge that much because it is a machine shop operation. You are dealing with tolerances in the 0.005" range and there ain't no way you can eyeball that accurately enough. This is one job I would bite-the-bullet and take it to the shop.

Make sure it is a reputable shop that will stand behind their work. A bad machinist can screw it up as badly as you can and leave you holding a ruined part and empty wallet.
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Old 06-28-2006, 02:43 AM
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The front bearing retainer centers the transmission. Get that milled out to fit by a machine shop. The mounting holes can be drilled by punch transfer. I'm assuming you mean slip the trans on the bell then transfer the hole locations. As long as the bearing retainer is a snug fit (should drop right in, but fit closely) the trans should center correctly. So don't just grind out that center hole! Take the bearing retainer off the trans and take it with the bell to the machine shop. Make sure you tell them it has to be within 0.005" centered.

IIRC, the bolt pattern of a T-96 (AMC used them in Ramblers) is short top to bottom. The top two bolts should be in the right location for the Tremec, but the lower two on the Treme are way below the flat of the bell. I had considered swapping a Ford SR-4 (same pattern as BW T-4 and T-5) into one of my Ramblers. I planned on using a 1/4" steel plate between the trans and bell with two steel brace straps or rods from the bottom trans holes to the bell. The Rambler was like the Stude -- no trans mount/crossmember, the rear mount/crossmember was under the bell housing.
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