Whats up guys. I'm in the process of installing a new 383 stroker crate into my 1990 GMC Sierra SCSB Stepside. The answers I'd like help with pertain to swapping my 700r4 for a standard transmission. Everything I've read has been pushing me toward the t56, but I'm not really sure what all I will need to accomplish this. If i were to run the t56 in my truck, would I be able to use the stock style hydraulic clutch master/slave cylinders? I was also wondering if it would be easier to swap in an older 4 speed (like a t10). I've been told that the 5 speeds for this model truck aren't very reliable with any performance in front of them. Any insight on which transmission I should run, and what I would need to accomplish either would be much appreciated.

Thanks in advance!

 

bump-

 

T-56 Swap
and
http://www.gmtruckcentral.com/articles/t56.html
hope it helps, im planning the same in the future.

 

did you start your work of converting?

 

Not yet, about to drop in a built 5.3 LM7 in the next few weeks. Will be retaining my mild built 4L60E for about a year while I collect parts and money for the T-56 swap.

 

What is your motivation for the swap?

 

Not sure if your asking me or him?

Mine is because I want the increased gears, better performance and gas mileage. Easy swap and I want to build the truck to my liking and a 6-speed is right up my alley

 

No, I was asking him; I assumed yours was going to be a performance build. I ask mostly because the NV4500 might be a better fit and an easier swap for him if he isn't going for a crazy performance build and would just enjoy changing his own gears.

 

True, only thing that would concern me is that he said he is doing a 383. The NV4500 from what I have been told does not hold much for performance. I have heard from 2 or 3 guys who tried it and either wished they did not put it in or ended up changing to the T-56. I believe the stock T-56 from the 1998 and up can hold around 450 ft lbs stock.

 

Got it. Yeah, I read that he was considering an old four-speed so I assumed maximum performance wasn't a priority. I think an NV4500 could do fine behind a Gen1 383, but obviously if he's got the coin he might as well go with the T-56 from the get-go.