i need to upgrade my tranny to use the power i have available, but im getting conflicting info on what really needs to be done. some people say i need to do t/c v/b and all the shafts, but then im told all i really need to do is just the t/c and v/b, unless im gonna tow alot. so with the mods in my sig, what do you guys think i need to do? right now if i run anything higher than tow on the downloader my converter starts slipping under good acceleration.



thanks for all your help

 

I'm in a similar position... the way I look at it is whatever mod's are on the truck now probably won't be the same mods on the truck later on down the road. Power is an addiction. Previous transmission experience tells me it's cheaper to spend the money now and do it all at once than it is to try and piece meal it together one upgrade at a time. I've got a built C6 that has thousands of dollars in upgrades. It's good for 800hp and will hold up to 800lbs of torque in a high heat and desert environment. At the time the transmission was built it was serious overkill because I wasn't running a built motor... with the new motor the same trans is still up to task. If I had gone middle of the road the first time I'd be in the hole about $1500 now in wasted parts and R&R costs.

Regarding the parts... If an input shaft lets go it can take things with it causing lots of expensive damage. With basic mods it doesn't appear that the 48RE input shafts are grenading with any regular pattern... can't say much about the 47RE, but add in a valve body and torque converter that can transmit the power with less slippage and faster engagement I can see where breaking shafts becomes more of a concern of mine. For me it comes down to basic economics... I'm saving for the whole shebang. I think each situation is different and that's why some people are telling you one thing and others telling you something different. Each situation is different and I don't see how any one answer is going to be the solution to your dilemma.

 

Shafts and clutches are a good idea if you have the cash. All I did was TC and VB and I have had no problems and I haven't exactly been easy on it. Those two items make a world of difference. If you plan on making more power in the future then it's wise to do it all the first time so you don't have to pull the trans out again.

 

Give DTT a call great people to work with they will tell you what you will need for you app.

 

Make sure if you upgrade the T/C you install a heavy duty flexplate. As for as Suncoast goes, they have one hell of a shop and some great guys working there. I took my truck to Fort Walton Beach, Fl and they installed everything. These guys personally test their products to the limit. Jeff Prince here Corpus Christi has a dually with their transmission and runs mid 10's.

 

I just did the T/C and V/B because I dont plan on racing or pulling and only staying around 4-450 in hp. From what I have been told the shafts are for hard 4x4 launches racing!!