The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

markeb01 · 11-05-2009, 02:58 PM

If it's original it should have a 10 spline 1 1/8" input shaft. These were used from the mid 50's the mid 80's on various models. The later design has a 26 spline input shaft. If you found the deal of the century on a trans with a 26 spline shaft, the only thing you'd have to do is install a matching clutch disc (and of course a new pressure plate so they would wear evenly).

11-05-2009, 02:58 PM	#12
markeb01 Senior Enthusiast Join Date: Feb 2007 Location: Spokane Valley, WA Posts: 8,356	Re: Transmission jumps out of 3rd gear If it's original it should have a 10 spline 1 1/8" input shaft. These were used from the mid 50's the mid 80's on various models. The later design has a 26 spline input shaft. If you found the deal of the century on a trans with a 26 spline shaft, the only thing you'd have to do is install a matching clutch disc (and of course a new pressure plate so they would wear evenly).