2009 2500 HD 6.0 with trans in a 85 4x4. would this work??

[NASTY-LSX]

I have the opportunity to pick one up from a buddy of mine. I know I just bought a 454 vortec roller motor for my truck, but i could get my money back easy on that if i have to. The thought of a LS with those L92 heads and fuel injection would just plain be bada*s.. I know the motor would work easy.
What bothers me is the trans!!! Is this possible??

are there kits out there for this swap with a transfer case as old as mine (85)???

I was putting a 700R4 behind my 454. Dont want to use that for an LS, I would rather use the factory 2500 trans that goes with the motor!!(better then a 700r)

please, any and all info would be appreciated, pics to!!!

[franken]

Might want to mention which trans you plan for the LS. If I recall 6L is around 375CI (61L/CI?), so you give up 75CI. The LS is more efficient, but may not make the torque desired in a 4x4 pickup.

TC-wise, I think the trans is a big question. Unanswered.

I think a 700R4 was based on, or shared output w/ a TH350. The big GM trans may be similar to the TH400. Both early transmissions were used in GM trucks around that (85) time so you may be in luck regardless.

As you suspected, google the crap out of the trans, define what you have (205 or 208), and so on.

Lots of squares were made, so they have aftermarket support and are robbed for parts so building is not so expensive.

85 may be NP208 or NP205. Check if it's aluminum or half ton...

I'm gathering bits to make a 72 K10 into an NV4500/NP203 doubler/NP205 setup so I've been reading...

[4x4k30]

i have got a 6.0 and 4l80e with a np 205 in my 77 gmc k3500 crewcab its out of a 2006 gmc 2500hd 2x4 i had to take 2 inches off the rear output shaft of the transmission and used a old turbo 400 205 tcase adapter it had to have a little machining it works so far but i havent gotten to drive it on the road yet cause its been in the body shop. but i dont see no problems there are alot of these swaps going on now with all kinds of t cases i assume you have the 208

[andrewmp6]

They make adapter kits to run almost any t case on any gm trans now a days.If you have a np208 i would use it as a reason to upgrade to a np205.

[NASTY-LSX]

Originally Posted by andrewmp6

They make adapter kits to run almost any t case on any gm trans now a days.If you have a np208 i would use it as a reason to upgrade to a np205.

I pretty sure I have a 208,(not that sure) but.. I thought 205 were hard to find and are $$$$$$$ nowadays??

[NASTY-LSX]

gonna look tomorrow and see if i have a tag on my TC.

[NASTY-LSX]

Originally Posted by franken

Might want to mention which trans you plan for the LS. If I recall 6L is around 375CI (61L/CI?), so you give up 75CI. The LS is more efficient, but may not make the torque desired in a 4x4 pickup.

.

Ill have to see what trans it is. As far as the ls, I figure I could have a custom grind cam made built for torque. I like the idea of 400/450 VVT on a basic stock motor

[nekkidhillbilly]

4l80 will bolt in there but i would use a 4wd 4l80e. 6.0 will run off and leave a 454 unless you have alot of money in the 454. plus most 6.0 trucks get 16 mpg.

[NASTY-LSX]

Originally Posted by nekkidhillbilly

4l80 will bolt in there but i would use a 4wd 4l80e. 6.0 will run off and leave a 454 unless you have alot of money in the 454. plus most 6.0 trucks get 16 mpg.

Yea, the MPG with power is what im after.

[andrewmp6]

A rebuild np205 around a grand plus shipping http://offroaddesign.com/catalog/transfercaseparts.htm used depends what spline it is and remember ford used them too and some can't tell them apart.If its just going to be a normal truck you could get away with the np208 if you keep the tires under a 38 inch size.

[nekkidhillbilly]

i cant see the 208 being any weaker than the half tons now. they offer the 6.0 and 6.2 in one.

[NASTY-LSX]

Originally Posted by andrewmp6

A rebuild np205 around a grand plus shipping http://offroaddesign.com/catalog/transfercaseparts.htm used depends what spline it is and remember ford used them too and some can't tell them apart.If its just going to be a normal truck you could get away with the np208 if you keep the tires under a 38 inch size.

Yea, its going to be a street truck, it will also be used to pull my open 18 foot car hauler, thats it. tires will never go over 33. tight now i have 33x12.5 and it runs and drives like a car. when i give it gas to take off, the truck does not feel heavy what so ever.

I was going to use a fast EFI for the 454, but prefer new technology (6.0)

[nekkidhillbilly]

theres nothing wrong with a 454 but unless its built like a ls5 or ls6 from 70 its not going to be a powerhouse. but all the money to convert it to efi and add overdrive. you could though possibly get a vortech 454 and 4l80e and with a little work kill the 6.0. out of the box the 6.0 though would be the best choice.

[NASTY-LSX]

Originally Posted by nekkidhillbilly

theres nothing wrong with a 454 but unless its built like a ls5 or ls6 from 70 its not going to be a powerhouse. but all the money to convert it to efi and add overdrive. you could though possibly get a vortech 454 and 4l80e and with a little work kill the 6.0. out of the box the 6.0 though would be the best choice.

I have the 1999 factory roller cam 454 vortec. Since im not building a race motor
My plan was edelbrock rpm oval port heads, custom grind cam, edelbrock rpm intake, header, fast efi, and so on and of course the 700r4 trans. enough to keep up or out run the diesel guys when they want to play. LOL

[nekkidhillbilly]

well that 700 would die behind it even a pretty beefy one. i would at least use a 4l80e. but if you have a 99 you could use engine with a 4l80e and the efi system from a oem 99 truck. put the heads cam and headers on it. tune the ecm up. would make in the 4s on hp and tq both. be a good running engine and prob be as cheap as the 6.0. def dont want a 700 behind a big block with alot of tq. truck would be pretty fast still a tuned modern diesel would blow your doors off till you get to about 120 mph when the diesel is on the redline.