'94 suburban 1500- which tcase? - Pirate4x4.Com : 4x4 and Off-Road Forum

roastbeef · 05-25-2009, 06:59 AM

my bud needs a new tcase. its a '94 suburban 1500. before we go hunt one down, i did a little research and found that there were two different types- the 4L60E and the 4L80E.

what is the difference?

thanks a bunch.

AusTex · 05-25-2009, 07:38 AM

Well the 4L60E is 16 bolt pan and the 4L80E is a 17 bolt pan if that helps. The 4L60 pan is more rectangular than the square 4L80.

4L80E

4L60E

Search brought the good info..

http://www.pirate4x4.com/forum/archi...p/t-63584.html

just4cuz · 05-25-2009, 11:13 AM

A K1500 will probably have the 4L60E in it with a NP 241 drivers drop t-case. Look on the back of the old t-case, it has a round metal tag screwed into it that has the model number and low range ratio stamped on the tag.

Should have NP-241 and 2.72-1 stamped on the tag.

roastbeef · 05-25-2009, 03:12 PM

thanks a bunch guys. if we were to swap out cases, would it matter which one we got? does either one have a lower 4lo or anything?

i don't know which one he has yet, but i guess what i'm asking is can they be interchanged, and is one better than the other?

edit- nevermind, i found the info. looks like we are going to want to do a direct swap. thanks again!

AusTex · 05-27-2009, 09:27 AM

Just keep in mind you don't want to run a 4L60 computer on a 4L80 transmission so keep that in mind if you swap them.

05-25-2009, 07:38 AM	#2 (permalink)
AusTex Registered User Join Date: Mar 2008 Member # 111469 Posts: 25	Well the 4L60E is 16 bolt pan and the 4L80E is a 17 bolt pan if that helps. The 4L60 pan is more rectangular than the square 4L80. 4L80E 4L60E Search brought the good info.. http://www.pirate4x4.com/forum/archi...p/t-63584.html __________________ 1997 GMC 1500 blocks & IFS - DD 1981 Toyota - dcg9381's old rig - Rebuild in progress Last edited by AusTex; 05-25-2009 at 07:48 AM.

05-27-2009, 09:27 AM	#5 (permalink)
AusTex Registered User Join Date: Mar 2008 Member # 111469 Posts: 25	Just keep in mind you don't want to run a 4L60 computer on a 4L80 transmission so keep that in mind if you swap them. __________________ 1997 GMC 1500 blocks & IFS - DD 1981 Toyota - dcg9381's old rig - Rebuild in progress

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05-25-2009, 11:13 AM	#3 (permalink)
just4cuz Registered User Join Date: Aug 2007 Member # 98655 Location: Alta Loma, Ca. Posts: 1,824	A K1500 will probably have the 4L60E in it with a NP 241 drivers drop t-case. Look on the back of the old t-case, it has a round metal tag screwed into it that has the model number and low range ratio stamped on the tag. Should have NP-241 and 2.72-1 stamped on the tag.