OneQwikSS

iTrader: (8)

so i've got a '99 - '00 LQ4 now i've done some searching but come back with some ooolllllllldd threads...so here goes...i see everywhere that the 99 & 00 LQ4's had a difference in the flexplate/crankshaft that makes them unable to bolt to a T-56....has anybody come out with a fix for this yet like a spacer or anything? or can i ONLY bolt my LQ4 to a 4l80e? thanks guys

OneQwikSS

iTrader: (8)

i heard i can run a car 6.0 rear plate & car 6.0 rear main to use the car 6.0 crank...is this correct?

04Burban

I don't see why you couldn't make a hybrid LQ9\LS2 lol. I mean, it's a long shot, but the LS2 was mated to a T56

brent5631

iTrader: (7)

The crank on your lq4 is longer. later years they were shorter and just used a spacer. So I think your SOL on getting a t-56 to work with that crank.

OneQwikSS

iTrader: (8)

i'm not planning on re-using the crank i know that it won't work

brent5631

iTrader: (7)

If you get a new crank it should work just fine.

hog

More info here, this is a list that shows the differences in flywheel flange thicknessess.

Crankshaft Replacement Caution For
1998-2005 GM 4.3, 4.8, 5.3, 5.7 & 6.0L Engines

The AERA Technical Committee offers the following information on crankshaft replacement caution for 1998-2003 GM 4.3, 4.8, 5.3, 5.7 and 6.0L engines. Design changes in the flywheel flange thickness have been made to some crankshafts used in the above-mentioned engines. This bulletin is being re-published with additional information.

The later crankshafts are shorter on the flywheel flange as seen in the listing below. These changes are due to the many different vehicle / transmission combinations being built by GM.

A flywheel spacer ring GM Part #12563532 and a longer bolt set GM Part #12563533 is required when using a thin flange crankshaft to replace a thick flange crankshaft. Also, if the crankshaft is being used in a vehicle, which is a standard shift application, you also need pilot bushing GM Part #12557583 or 12479894.

Note: GM part numbers correct as of 12-18-04.

Years Liters Casting # Trans Flange Thickness

1998 early 4.3L 236, 255 V-6 1.62 thick flange
1998+up 4.3L 236, 255 V-6 1.500 thick flange
1999-2000 4.8L 312 V-8 M/T 1.250 thick flange
1999-2000 6.0L 215 V-8 1.250 thick flange
1999-2005 4.8L 482 V-8 A/T .857 thick flange
2001-2005 4.8L 482 V-8 M/T .857 thick flange
1999-2005 5.3L 216 V-8 A/T .857 thick flange
1997-2005 5.7L 216 V-8 .857 thick flange
2001-2005 6.0L 216 V-8 .857 thick flange

All GEN III crankshafts used in Camaro, Corvette and Firebird have a .857 thick flange and also have a freeze plug installed at the bottom of the pilot shaft hole. The 4.8, 5.3 + 6.0L don?t have the freeze plug. The drilled hole thru the centerline of the 5.7L LS1 & LS6 crankshafts allows a path to balance crankcase pressure within the lower crankcase. Doing so has eliminated possible oil consumption when the engine is operated over 4800 RPM.

Caution: Early crankshafts use a flat reluctor wheel and late have a recess. Recess will work on all years. Do not use a flat reluctor on late applications as it will cause an engine misfire.

peace
Hog