700r4 behind LS1

[ACTIV8]

Hey,
Just wondering if you guys leave the std 700r4 in when you do your ls1 conversions. Have done this conversion before but used a built t400 so just trying to work out a cheaper way. We have the 4L60E's in our gm cars over here but they dont seem to be holding up too well so what do you guys suggest?
Cheers
Brendan

[PurpleMinivan]

I'd suggest a 4L80e or TH400 (w/ gear vendors)

[never2low]

Im in the process of using my built 700r w a 3500 stall behind my ls1, I'm hoping it holds because the swap took all of my fun money. I should be running this weekend so we will see.

[inovermyhead]

Will the 700r4 or TH400 bolt to a Gen 3 5.3?

[5.3swapn1992]

yes they will bolt up i have the 700r4 behind my 5.3 i used the hughes flexplate part#hp4004 , ls1 adapter #hp3795 thats all you will need to bolt the turbo 400 it has both bolt patterns for the two converters but the 700r4 will need the bowtie overdrive throttle valve cable kit, just completed the swap, so any questions just hit me up

[classic79]

What throttle cable did you use, and did you need a throttle cable/tv cable bracket with the bowties kit

[5.3swapn1992]

bowtie overdrives sells two cable tv kits ,one that works with the truck intakes and one for the ls1 style intake, they come with everything to install ,throttle valve spring ,braided cable,brackets ,throttlebody adapter bracket and all misc. stuff

[classic79]

Another ? how do you control the TCC lockup? Do you let the old style truck run it off the old ecm or do you have to use a standalone lock up kit like tci or the gm performance one.

[inovermyhead]

Wow thanks 5.3swapn1992! That is some good info there. I have been searching for a 4L60E but after hearing all the reliability issues and all the extra stuff required w/making a 4L80E work it does sound more inviting to go w/the 700 or the 400. Now which to go w/and what to do w/the wiring? Hmmm.....

[flattopwill]

Using a 4l80e is actually really easy. Just need a 6.0 flexplate and spacer then change two pins in the harness if you have a 4l60e harness. Then add a vss connector.