TBSS 402 Build AWD

Jake747

New member
May 13, 2015
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Seattle
Whelp, here it is. It's already built but still adding a few things here and there with some new changes coming soon.

I bought the truck 3 years ago Memorial Day absolutely stock with no plans to keep it that way. I can't leave shit alone. Anything.

So here's the mod list as it sits now:

Forged TSP 402 stroker
11.3:1 CR
Callies Compstar forged crank and rods
Cleavite bearings
ARP bolts and head studs
Wiseco forged pistons
ready for spray
AFR 230 heads with port work, valve guide and valve job custom LT1Z cam 23X 24X 62X 62X 113
FAST LSXRT
FAST Black Fast fuel rails
wire tuck
Black Nick Williams 102
Fenderwell Intake LS7 MAF
LS1 fans w/ 2 relay harness
Big 3 wiring upgrade
PCMofNC plug wires
TR-6 plugs
PC'd Holley valve covers
42 Draft Designs catch can
DP Hoses orange*
All vac and heater lines are black braided
Kooks 1 7/8" headers
custom dual mandrel bent 3" exhaust
Magnaflow X-pipe
Dual Borla XR-1 / dumps pre-axle,
RPM 6 with all available RPM upgrades
B&M Deep Trans Pan
Yank PTB 3600
TCI 6 bolt flex plate
ARP crank and TC bolts
PCM Brake Duct Tranny cooler
Billet 300M intermediate shaft
carrier bearing conversion (Royal Purple 75w-90)
LC32 Crossmember
DJM upper A-arms
KBee coil overs
PC'd orange 30.5 springs
Spohn Chromoly adjustable rear UCA/LCA/Panhard
DJM Rear Swaybar
EvilSS one off endlinks
Grant steering wheel
Envoy Denali cluster bezel
Alpine Nav/DVD
ALL REAL CF (no vinyl BS)
CF Dash bezel / shifter trim / dual gauge pod*
CF D-pillars
CF Scott's hood
CF blank rear valence*
CF front bowtie
CF Mavman brake ducts
CF mirrors
Tuned by LT1Z in person
True Forged Mach 6 17x9.5 with M&H Racemasters 275/50/17 w/ TPMS
General Grabber UHP 275/55/17 street tires
Custom one off blacked out (paint matched) bi-xenon retrofit headlights
D2S projectors
H4 HID 6k low beams
Blazer fogs w/ 3k HID
Switchbacks
LED Mirror turn signals
All LED interior / tag / reverse lights
Billet bumper plate
Tinted smooth tails
07+ rear wiper
rear handle delete
All interior panels plastidipped black to match
DRL killer, quad beams, auto fogs

We put it on the local dyno and had nothing but issues with the non-coupled AWD dyno so no accurate numbers there. First time at the track ran a 12.08 and 12.03 on stock 20's and break-in tune. Went back in late May on 17" DR's and ran 11.88 11.85 and 11.83 which were all good enough for the TBSS NA AWD All Motor Record according to TBSSOWNERS.com. I lost the record a few months later to an 11.7 but that shouldn't stand for too much longer....

On to the pics....

Day of Delivery:

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Few randoms throughout the stages

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And the motor build:

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Engine bay cleanup. Removed AC, capped the lines out of the firewall, ran new heater hoses, removed washer tank, untangled the stock mess of an engine harness, and painted a few things

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Oil cap I modded to fit the Holley covers

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Holley covers with painted coils

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Modded oil pan with baffles and relocated pickup tube from PCMofNC

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New Motor coming together at JRG Motorsports

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Eventually switched out the red rails for black ones and the polished NW102 for a black one as well. Painted the motormounts, carrier and front diff. All new seals in the diff and rebuilt the carrier and converted it from GM grease to gear oil.

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Last edited:
Transmission? Awesome build!

Trans is an RPM Transmission Level 6 4L70E with all of the upgrades/options aside from the SFI Bellhousing. I went with the level 6 because at the time it was overkill for being behind a bolt-on motor....

Holy shit I'm in love. Did the stock motor gives up? Or did you just pull it


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300 miles after installing the Yank 3600 stall and RPM Trans, I did a 3k launch getting onto the interstate and spun the bearings in the motor. Didn't window the block, just a bad knock so I shut it down and parked it until parts became available and until Matt (LT1Z) and I made a decision on what was the best route to take for the build.


Damn...so its as gnarly as it looks in your tiny avatar pic. excellent.

Thank you.


Can I ask why the 2 X Pipes?
I know their purpose, but never seen 2 used

1 X-pipe, 2 Borla XR-1's
 
that launch let the pump run dry? isnt that a common problem with tbss?

Yes it's common. More common once the 60' times get below the < 2.0 range. This pan design SUCKS. The pickup tube is up front and fwd of the tube where the intermediate shaft runs through the oil pan. For the AWD guys the only fixes are the PCMofNC kit, Accusump, or a custom pan from a forum member that makes them. For the 2wd guys, they can go with the tubular crossmember from LeftCoast 32 and AC bracket, and run a C6 pan.
 
Yeah I just blew up my lq9 about a month ago. Hoping to do something like this just not as extreme. Maybe a little more budget minded like a 408 with stock 317s just ported and polished. Hoping to stay around 4000-4500 with mine. I'm sure it won't work that way though lol.


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Yeah I just blew up my lq9 about a month ago. Hoping to do something like this just not as extreme. Maybe a little more budget minded like a 408 with stock 317s just ported and polished. Hoping to stay around 4000-4500 with mine. I'm sure it won't work that way though lol.


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Are you planning on boost? If not, I would go with a set of 243's and I happen to know of an AI set that hasn't been installed yet. 64cc for $1400 shipped
 
Hold up, you built a forged 402 but don't have any forced induction?

When's the turbo build starting?!
 
Hold up, you built a forged 402 but don't have any forced induction?

When's the turbo build starting?!

Lol yep.... I'm a sucker for old school NA, big cammed power. But throwing a 125 shot on it should carry it deep into the 10's.....

Keep in mind.... It's just a daily driver SUV.... ;)
 
Lol yep.... I'm a sucker for old school NA, big cammed power. But throwing a 125 shot on it should carry it deep into the 10's.....

Keep in mind.... It's just a daily driver SUV.... ;)

Old school NA is awesome, but a big cam and a heavy truck wont be a great DD IMO

I think you'd really regret not even throwing a maggie on there. Your motor could handle anything a maggie could throw at it plus nitrous. Then you could have better reliability with more power.