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MikeK · 08-13-2017, 07:19 PM

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There are two basic forms of the T5. The NWC (Non-world class, sliding gears on shafts) and WC (World class, rollers on shafts). 1993 is the approximate date of transition. Both have identical case/bolt dimensions but the internal gear sets are not interchangeable. There is also a variance in the oil feeder hole for the overdrive gear in the tailshaft section, so if you replace the trans and keep your tail section they either need to match (NWC & NWC or WC & WC) or a slight mod can be done to use a mix. There is also a variance in the speedo drive gear location, and this can be addressed too.

All that said, unless your case is cracked they are an easy rebuild. No need to replace. The WC box is way overkill for a model A. You're never going to wind it up to 6,000 rpm with 400hp nor power-shift at several thousand rpm.
pix from google images. . .

08-13-2017, 07:19 PM	#5
MikeK Senior Member Join Date: May 2010 Location: Windy City Posts: 2,919	Re: Chevy T5 in a model A Sponsored Links (Register now to hide all advertisements) There are two basic forms of the T5. The NWC (Non-world class, sliding gears on shafts) and WC (World class, rollers on shafts). 1993 is the approximate date of transition. Both have identical case/bolt dimensions but the internal gear sets are not interchangeable. There is also a variance in the oil feeder hole for the overdrive gear in the tailshaft section, so if you replace the trans and keep your tail section they either need to match (NWC & NWC or WC & WC) or a slight mod can be done to use a mix. There is also a variance in the speedo drive gear location, and this can be addressed too. All that said, unless your case is cracked they are an easy rebuild. No need to replace. The WC box is way overkill for a model A. You're never going to wind it up to 6,000 rpm with 400hp nor power-shift at several thousand rpm. pix from google images. . .