on a 135,000 mi tranny will a scIII hold up to efi live and a lift pump (stock turbo and injectors) whats the difference between the sc III and scIV

If you add a couple of pieces to it Pressure reg spacer and a good converter

Do a search there is alot of info on this..... III will hold just over 500hp I think 524ish is when it slipped.... But if you are going tjo the 500 level hell go with the IV.

i will proably never get a bigger turbo or injectors I just want efi live for the feature and dont want to burn the tranny up in the process what shims are you talking about

on a 135,000 mi tranny will a scIII hold up to efi live and a lift pump (stock turbo and injectors) whats the difference between the sc III and scIV

If your getting a ITS stage III, you'll be fine imo

Do a search there is alot of info on this..... III will hold just over 500hp I think 524ish is when it slipped.... But if you are going tjo the 500 level hell go with the IV.

Where did you here of this slipping point??

well i work at a machine shop we built a lot of high performance engines sprint cars and such so id like to try the install my self does the SCIII come with everything a 135000 mi tranny would need start to finsh?

what the difference between the III and IV beside holding power do the shifts feel different? i just want short crisp shirt and no limping with efi live someone said it best one here one time my allison just clicks off shifts!!!

what the difference between the III and IV beside holding power do the shifts feel different? i just want short crisp shirt and no limping with efi live someone said it best one here one time my allison just clicks off shifts!!!

Tunning is going to play a big role in the way your truck shifts. In my opinion you'll be fine with a SC III. There are many members here running over 500hp with a III with no issues.

thanks everyone i will order from mike l does anyone know what his III cost.

Where did you here of this slipping point??

I read it somewhere here, Casper was the test vehicle and they detected slippage around 524-534ish.....

I read it somewhere here, Casper was the test vehicle and they detected slippage around 524-534ish.....

Maybe you are thinking about there Red truck that limped on the dyno with just a converter and transgo jr.?

Was on the Dyno and not too sure of the vehicle now.....:rolleyes: and it was McRat...

Here is something that no one tells you.
The Suncoast or ATS kits are clutch and performance upgrades only. This is not a rebuild guys. With high mileage you may have needle bearing problems and internal seal problems that were not meant to be addressed with these hp kits. You will need to be sharp enough to spot these problems or find a professional that can. Look out and be carefull. This is a bif investment. Bunch of guys here claim it' easy. I say bullshit. I did not require training and still do to do easy shit. Be carefull.

Mike is correct, they are upgrades. You should always inspect internal components, install the gasket and seal kit to take care of the internal seal issues etc, just like all pro builders do when we build a unit. For the guys doing it themselves, there is info out there that explains that and, the vendor they got there parts from should be able to offer assistance and answer any questions they may have, no question is a dumb one. As far as easy ,,as far as teaching someone to build a unit I would choose this unit over any out there. Dodge and Ford are a much more complicated build.