i got a good deal on a 4l65e trans and i was told by the seller that i would need a ls1 type crank? they dont run for much so i decided to do it! will i loose hp by switchin cranks? and is it harder then it sounds? is the 4l65e worth it? thanks for any help

 

it will bolt up, only difference in a 4l60 and 4l65 is a 4pinion planetary vs a 5 pinino planetary in the 65E...

need some more infon on what your workin on tho...

 

yep what motor/year/4wd or 2wd?

 

sorry forgot that..its a 2000 6.0 engine out of a 2500 pick up...the tranny not sure what its from. pretty sure its from a 2wd truck because he had plans to install it in a ls1 i believe...the engine and tranny will be goin in a 87 s10. 2wd... with future plans to h/c set up and nitrous!

 

the 2000 6.0 has a longer crank and will not bolt up to the 4l65e. You would indeed have to change the crank out on the engine. Instead I would recommend installing a 4l80e transmission which will bolt right up and is far stronger than the 65e.

 

^^^
You are correct.

here is some info:

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.

peace
Hog