Billet input and output shaft ?

skolman91

skolman91

Member
Re: Billet input and output shaft ?

I know you dont want to hear this but both of those together are as much as a 80e input shaft, youre at a point now it doesnt make sense to continue with 700/60e imo why not upgrade and forget about it..
If your dead set on sticking with a 700 because of the configuration, id call up rpm and get decent 60e and trans controller that you can use later with a 80e just my 2cents. Even then built 700/60e's arent indestructible, i broke the output shaft in my SS with stockish power, just alot of weight behind it..
Good luck getting it back together you have a very nice ty overall:tup:
 
Sean Krupa

Sean Krupa

Moderator
Re: Billet input and output shaft ?

I agree, I need to upgrade to an 80E but cant let the truck sit for months while I save $$ for all the parts and research. I only had the truck out for 2 weeks and had to replace 2 half shafts and rebuild the Tcase and now the Trans. I want to repair the 700r4 for now and drive it.

I need to also focus on Building a "Built" engine to swap in this winter. So I have my hands full. :roll:
 
randy merritt

randy merritt

Donating Member
Re: Billet input and output shaft ?

My Syclone trans, with the kit from Dana, has a MUCH softer 1-2 shift than my stock TY. You can barely feet it shift a part/low throttle. I cringe every time the stock truck shifts because I know that that shock from the hard 1-2 shift is not good on the trans. Under hard acceleration, my Syclone shifts a firm 1-2, but does not have a "bang" shift.
 
Sean Krupa

Sean Krupa

Moderator
Re: Billet input and output shaft ?

Thanks Dave! My plan now is to "patch" up my Trans with a stock shaft and get it back on the road to enjoy. Goin to turn the Boost down a tad and start collecting parts for an 4L80E swap.

My Trans shifted a tad softer than stock also, so by all means wasn't neck breaking like a stock trans. The Trans broke goin into 2nd, would imagine cause all the Power it's making now compared to last year.
 
93 TY 2185

93 TY 2185

Donating Member
Re: Billet input and output shaft ?

What is a realistic cost of the 4L80E conversion with everything now a days?
 
NOJIMMY

NOJIMMY

New member
Re: Billet input and output shaft ?

DaveP said:
If you do the 80e conversion I for one would be very interested in hearing about the results in ET and 60-foot with no other changes.

The gear ratios in the 60 and 80 are different. By a bunch. This has to affect loading on the engine which affects turbo spool, efficiency, the launch, etc. Bunches of things.

Most of the 80e conversions on here were performed during extensive builds that changed everything else too. You will have an opportunity to evaluate the differences that only the transmission caused. :
Click to expand...

Comparing a 4L60e against a 4L80e transmission (minus cost, reliability, and electronic control) a fascinating topic.

1. With the 4L60E the overall gear ratio in first is12.54. With the 4l80E it will be 10.16.
So theoretically, you will lose in 60ft. You could change the rear gear, but you would have to change it a lot to get back
to the same overall ratio in 1st. Then you may run out of gear at the finish line. You could leave the gear the same, but add more converter.

2. With the 4l80E an additional 30 lbs of weight (without the converter) should make very little difference in a 4000+ lb Typhoon.
Also the additional 10 lbs of rotating converter mass is minor in comparision, about the same (perhaps) as the difference between a steel
and aluminum drive shaft. Maybe a 5 HP or 5 ft-lb torque loss due to higher internal friction or additional weight gain.

3. So what about RPM lost and retention between shifts and its effect on ET. Could the 4L80 have the edge in 1/4 by it's gearing
doing a better job of keeping the engine higher in power band between shifts. The only advantage of the 4L80s gearing is that each
gear change has less of a drop in rpm.I Guess one could buy a 4L80 with a transbrake and slam it outa the hole and make up the difference.

4. Most of the guys doing the 4L80s are big power adder guys that dont need the gearing that the 4L60s add to the overall equation.
Maybe big(ger) TURBO is required or a bit of spray.

5. Lastly one may need to consideration gear "blow thru". Gear blow thru is length of time engine will be a lower gear before it's shifts to
the next gear thus losing the mechancal advantage of gear.
 
Sean Krupa

Sean Krupa

Moderator
Re: Billet input and output shaft ?

One thing I like about the 80e is the longer First gear. On my truck 1st gear is useless after a Launch. Goes by way too quick.

Tryin to research to see how much I have to build a 80e to handle 10sec power for a long time. Hopefully just a Shift kit with good clutches.

If anyone has 80e parts laying around I might be interested depending what they are. Thanks.
 
atkonkler

atkonkler

Is this your bush?
Re: Billet input and output shaft ?

I've always thought the softer the shifts the harder it is on the clutches and trans overall. The firmer the shift the less wear and damage over time.
 
ty166

ty166

Donating Member
Re: Billet input and output shaft ?

atkonkler said:
I've always thought the softer the shifts the harder it is on the clutches and trans overall. The firmer the shift the less wear and damage over time.
Click to expand...

Soft shift I would think are harder on clutches per slippage and easier on hard parts as where a hard shift is easier on clutches but hatder on hard parts....
 
P

Pro Built Automatics

New member
Re: Billet input and output shaft ?

The 4L80E has accumulators, the 6L80E does not. On the TH400 & 4L80E use a TF727 .106" direct/forward snap ring in the intermediate clutch area. This works much better than the stock oem snap ring. If the lugs are blown out, TCS in Lake Havasu, Arizona can machine the case (this saves the case) to use a circular snap ring. Many do this before the lugs are broken. Talk to Rusty 877 627-8852.
 
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