304 VN AERO REBUILD (304 stroked to 350ci flat top pistons std 4" bore)

[F1Aussie]

The guy that put a 6L80 into his vs l read about years ago, said it fits. Had to hit the tunnel with the mash hammer where the shifter is Give the shifter a bit of clearance.

The physical difference between a 4L60E & 6L80 is the 6L80 is physiclly taller.

Here is a pic another member posted on his swap which was a lsa 6l90 into his vz crewman.
He didn't use the supercharger, went na, & went turbo with l think 7 lb of boost.

I went looking for his thread, which is on jc. But some of the pics no longer exist.
I had this pic on my pc.
View attachment 242803

So you know if the 6L50 and 6L80 are the same dimensions?

 

[Lex]

So you know if the 6L50 and 6L80 are the same dimensions?

I think, similar? The 6l50 built for the v6? My tranny bloke told me the 6l50 where in the s1 ve v8? Thats if l understood him correctly?
The 6l80 stronger. Built for the v8.
6l90 built more heavy duty. Basically a light truck trans.

Edit. Just realised l didn't answer your question. I think they must be similar, because the can fit the same vehicles with different engines.

 

[bjf66]

comparison in transmission
seems 6L80 is narrower than 4L60, pity hasnt got the height difference

GM Transmission Dimensions

A B C D D E F G H Trans Model Bell Housing Main Case Case Extension Length to Flange Length to Shaft Engine Block to Converter Lug Length to Extension Housing Engine Block to Mount Center Line to Bottom Pan 4L60/70 2WD 6.941 15.421 8.909 N/A 30.975 0

paceperformance.com

Gear	1	2	3	4	5	6	R
Type		Sun 1.1 Ring 1.1	Sun 1.2 Ring 1.2	Sun 2 Ring 2	Brakes Clutches	Ratio Span	Gear Step
Ravigneaux	Simple
Gear Teeth and Ratios	Planetary Gearset: Teeth Lepelletier Gear Mechanism	Count	Total	Avg.
6L50		37 47	47 97	49 89	2 3	6.0346	1.4326
Ratio	4.0650	2.3712	1.5506	1.1567	0.8532	0.6736	- 3.2001
6L80		35 46	46 92	50 94	2 3	6.0401	1.4329
Ratio	4.0267	2.3635	1.5319	1.1522	0.8521	0.6667	- 3.0638
ZF 6HP ALL		31 38	38 85	37 71	2 3	6.0354	1.4327
Ratio	4.1708	2.3397	1.5211	1.1428	0.8672	0.6911	- 3.4025

 

[07GTS]

may need to get someone local who knows transmissions
so the main advantage moving from hydraulic to electronic is shift control, wonder how it all works with 2700-3000 rpm convertor?
I still like the idea of 6 speeds, as driving the VF/ 6 litre now and it gets the car moving
although I have 3.9 gears in diff, so that 1st gear maybe too low

the auto will have to be tuned to suit the stall, not doing so can be bad for them not like old days when u just install and go, u can now control the clutches and tcc apply/release and many more tables all have to work to suit any mechanical changes as well, the life and death of a trans can be all in the tuning now days

 

[bjf66]

a manual seems a lot easier
never the less committed to auto one way or the other,
seems simple way forward is to stay with T700/4L60 and upgrade internals

 

[losh1971]

Glide......

 

[F1Aussie]

I think, similar? The 6l50 built for the v6? My tranny bloke told me the 6l50 where in the s1 ve v8? Thats if l understood him correctly?
The 6l80 stronger. Built for the v8.
6l90 built more heavy duty. Basically a light truck trans.

Edit. Just realised l didn't answer your question. I think they must be similar, because the can fit the same vehicles with different engines.

Yes for V6, good point about them being in same models, I didn't think of that

 

[bjf66]

Glide?, have one here with reverse manual valve body, use to run around Auckland streets with LH Torana 4 door, and tunnel rammed 327 with 5000 stall, and 9" 3.9 gears...fun fun fun
sold the torque convertor, still have trans
Had put it into the 66 chevelle when brought it over from NZ, a life time ago

 

[losh1971]

Glide, short for Powerglide.

 

[bjf66]

Yes for V6, good point about them being in same models, I didn't think of that

perhaps the VE, VF have more tunnel room around trans than the earlier VN