4L60 & 4L80 TC compatibilty...?

[HotRudyRod]

Hello, just a quick question. Are torque converters for 4L60 compatible with 4L80 transmissions? Thanks.

 

[DaveP]

Re: 4L60 & 4L80 TC compatibilty...?

No. Different hub and pump drive configuration..

 

[HotRudyRod]

Re: 4L60 & 4L80 TC compatibilty...?

Thaks a lot Dave, also. Not all 2008 Silverados, especially de ones with small engines had the 80 right?

 

[gobabygo]

Re: 4L60 & 4L80 TC compatibilty...?

you are correct. not all of them had 4l80e .

 

[HotRudyRod]

Re: 4L60 & 4L80 TC compatibilty...?

Thanks gobabygo.

 

[DaveP]

Re: 4L60 & 4L80 TC compatibilty...?

Thaks a lot Dave, also. Not all 2008 Silverados, especially de ones with small engines had the 80 right?

I'm not positive about this, and there may be differences among the years. but the way I know it is all 1500's have 4l60, 65, 70e's. The 2500 may have either. Higher GVW packages, or "2500HD" will have the 80e. And all 1 ton 3500's have the 80e.

 

[HotRudyRod]

Re: 4L60 & 4L80 TC compatibilty...?

I'm not positive about this, and there may be differences among the years. but the way I know it is all 1500's have 4l60, 65, 70e's. The 2500 may have either. Higher GVW packages, or "2500HD" will have the 80e. And all 1 ton 3500's have the 80e.

There you go, thanks Dave. His is a 1500 with what he calls a Vortech 4.8L, never heard of it but dont want to sell him something he wont need.

 

[midnightbluS10]

Re: 4L60 & 4L80 TC compatibilty...?

There you go, thanks Dave. His is a 1500 with what he calls a Vortec 4.8L, never heard of it but dont want to sell him something he wont need.

The Vortec 4.8L is in the LS family. Smaller version of the 5.3L Vortec V8. Hot Rod Mag did a buildup of one with stock internals, new cam, twin turbos, and head studs, basically. It made something like 1200hp

The sole modification to the short-block (at the advice of Jerry Stetler from Ace Machine) was to increase the gap of the top rings from 0.015 inch to 0.028-0.030 inch (we reused the original rings). The second (factory gapped at 0.028 inch) and oil rings were left untouched.

Since the exercise was designed as a strength test for the stock short-block, we opted to make a few changes topside. The stock 5.3L heads were ported by Total Engine Airflow and received larger intake valves and an appropriate spring upgrade. Fel-Pro MLS head gaskets and ARP studs hold the heads on, and the cam is an off-the-shelf 228/230 grind from Comp. The cam was run with a new set of Comp hydraulic roller lifters, as the originals were clogged and unusable, but we retained the stock pushrods and rockers. The final upgrade was a swap of the stock truck intake for a FAST LSXR intake, 75 lb/hr injectors, and matching 102mm throttle-body. In normally aspirated trim, the 5.3 produced 451 hp and 380 lb-ft of torque. It seemed odd to us that the motor produced peak power all the way out at 7,000 rpm, but we had a lot of boost to add and little time to ponder the issue.

The pair of 76mm turbos was combined with a twin-core, air-to-water intercooler, a pair of 45mm Hyper-Gates, and a single RacePort blow-off valve, all from Turbo- smart. A pair of JBA shorty truck headers with short tubing sections feed the turbos.



Read more: http://www.hotrod.com/techarticles/hrdp_1109_stock_gm_ls_engine_big_bang_theory/#ixzz2EtOCqEDE

They thought it was a 5.3, but after disassembling it, realized it was only a 4.8L.

 

[Darin]

Re: 4L60 & 4L80 TC compatibilty...?

I seem to recall that there was a cargo van that had the 4.8 and a 4L80e in it. I could be wrong, however.

 

[leadfoot]

Re: 4L60 & 4L80 TC compatibilty...?

What about the 4L60e vs the 700R4 -are the converters interchangeable?

 

[killa66cam]

Re: 4L60 & 4L80 TC compatibilty...?

What about the 4L60e vs the 700R4 -are the converters interchangeable?

Yes, if they have the same spline count. I think the earlier 700R4's were 27 spline, and the later ones were 31 spline. The 4L60E's should all be 31 spline. I'm going off of memory here, so don't quote me on that...but should be pretty accurate.

Cam

 

[dgoodhue]

Re: 4L60 & 4L80 TC compatibilty...?

As for the 4L60E vs 4L60 TC. At some point GM slightly changed the flywheel bolt pattern. I found this out the hard way when swapping in Vortec 4.3 and found the TC didn't bolt up.