FLT trans?

[mgrotel]

Well, my 60e is dead. Prob mostly my fault cause with a vette servo and transgo kit, the 1-2 is crazy harsh, I removed all tq mngt, and drive it hard. I was wot, and during the 1-2 which normally chirps the 37" tires, I heard a loud bang and the motor revved way past redline. As I was slowing down I heard the trans making a terrible noise. Now to even barely move it has to rev very high and still makes that noise. I have no forward gears, no rev, and no neutral. Had to disconnect the driveshaft to tow it home.

I'm thinking stage 4 FLT trans? Or what do you all recommend? And any suggestions on what stall for the tq converter? Cam in sig

[Dubyagee]

I have the stage four. Never had an issue. Firm shifts and consistent.

[mgrotel]

Harsh or firm with the stage 4? Does it come with a shift kit? I've had harsh the past couple years. Even at part throttle the whole dash shakes. I'd prefer just firm. Need a trans cooler too

[kemble]

Transbuilderguy, or 4l80e.

[mgrotel]

is transbuilderguy a member on here or is that a trans company?

[mgrotel]

and im not too keen on how much more drivetrain loss the 80e has, id rather build up a 60e more to keep less drivetrain loss

[kemble]

your going to be pushing the limits of even a better built 4l60e. He is a member.

[mgrotel]

ill really be pushing the limits of a well built 60e?

[transbuilderguy]

I think I could make a 60e stand up to what you got I see you have 456 gears so thats a plus... Iwould actually like to see a gear somewhere in the 5s though for a 60e..honestly a 4l80e doesnt take that much more power to turn the biggest diffrence in the 80 from the 60 that people think they have lost power is the gearing the 80 has a 233 first where as the 60 has a 308 thats where people report the power loss...I am always up for a challenge though the key with the 60e making it last is not hard shifting its actually softening the shifting thorugh proper accumualtion and countering that with proper clutchpack clearnce and apply surface. its a balance just like building a motor.

[mgrotel]

I think I could make a 60e stand up to what you got I see you have 456 gears so thats a plus... Iwould actually like to see a gear somewhere in the 5s though for a 60e..honestly a 4l80e doesnt take that much more power to turn the biggest diffrence in the 80 from the 60 that people think they have lost power is the gearing the 80 has a 233 first where as the 60 has a 308 thats where people report the power loss...I am always up for a challenge though the key with the 60e making it last is not hard shifting its actually softening the shifting thorugh proper accumualtion and countering that with proper clutchpack clearnce and apply surface. its a balance just like building a motor.

do you have any guesses on what happened to my transmission by the description i gave in the original post?
what would one of your transmissions cost?

[transbuilderguy]

sounds like the input drum broke from the hard shifting. you cannot make them shift hard with that much load on them.

[mgrotel]

and about my rear end gear ratio of 4.56s, i will be stepping down to 35" tires instead of the 37" tires soon, so that should help with the gearing a little more

[transbuilderguy]

then 4.56 will be good

[oldred95]

and im not too keen on how much more drivetrain loss the 80e has, id rather build up a 60e more to keep less drivetrain loss
I was skeptical of that too but honestly there was no noticable loss and the slightly higher 1st and 2nd really let you build up some speed before each gear change and the gear splits are nice and even so there is no fall on your face feel on the 1-2 like on a 60e.

I would never shift a 60E as hard as you are saying.

[mgrotel]

then 4.56 will be good

Can I call you in the evening? You are 2 hours ahead of me so I didn't want to call you too late

[transbuilderguy]

thats fine call me tommrow before 9pm my time is good.

[bigbob6988]

I think I could make a 60e stand up to what you got

This is why 60E's suck. If you were asking about a 80E, then transbuilderguy would have said, "I know I could make an 80E stand up to what you got." Nonetheless, a properly built 60E, can take a beating. Ask me how I know...

[transbuilderguy]

This is why 60E's suck. If you were asking about a 80E, then transbuilderguy would have said, "I know I could make an 80E stand up to what you got." Nonetheless, a properly built 60E, can take a beating. Ask me how I know...
and I could probably get the 80 built for as much or maybe even a little cheaper than the 60e

[mgrotel]

and I could probably get the 80 built for as much or maybe even a little cheaper than the 60e

hey man, what was that torque converter company you recommended to me? I think i am just going to rebuild what i have but with a better torque converter, less harshness, and an external cooler. thanks

[transbuilderguy]

circle d, fti. or precision industries(vigilante)

[KTMRACER]

FLT is a reputable company. They make great 60e's but even a built 60e is no match for an 80e with a shift kit.

[bigbob6988]

circle d, fti. or precision industries(vigilante)

Any reasons why you don't recommend Yank?

[mgrotel]

Any reasons why you don't recommend Yank?

word, what is wrong with yank converters?

[transbuilderguy]

never used one

[mgrotel]

well, so i broke the main output shaft into 3 pieces which then shattered most of the gears too. so, i am looking for recommendations on a good output shaft. something stronger and more durable, maybe a billet piece? thoughts? thanks

[mgrotel]

or do you think i will be ok with the stock shaft if i dial down the line pressure so the shifts arent so harsh???

[transbuilderguy]

you shouldnt have any problems with a stock output shaft. something went wrong in thattrans to cause that problem.

[kemble]

Or a little thing called 80E and firm but not teeth rattling shifts will fix it.

[mgrotel]

ive read the 4wd ones are weaker than the 2wd ones and they are a common failure point behind higher torque engines

[mgrotel]

or did i get some bad info on the 4wd output shaft being weaker than the 2wd?
maybe i should just do stock replacement? trans shop said the shaft broke first tho

[transbuilderguy]

honestly I have built the 60e in low 10 sec cars and even few 9s I havnt had a stock output shaft break....I have seen many input shafts and input drums break under torque which are a weaker link than the output shaft......so even if you spend all that money on a hardened shaft you still have about 5 weaker links in the trans before the shaft. if your breaking shafts for whatever reason maybe bahaing you may need to go to an 80e or with your tire size a th400

[mgrotel]

Ok, well, what is all needed to make an 80e work? Transfer case, driveshaft, etc?

[mgrotel]

And I did the 411 PCM conversion, how will that affect me getting an 80e. I had to splice into some of the 60e wiring for the 0411 swap.

[mgrotel]

honestly I have built the 60e in low 10 sec cars and even few 9s I havnt had a stock output shaft break....I have seen many input shafts and input drums break under torque which are a weaker link than the output shaft......so even if you spend all that money on a hardened shaft you still have about 5 weaker links in the trans before the shaft. if your breaking shafts for whatever reason maybe bahaing you may need to go to an 80e or with your tire size a th400

Is this on 2wd 4l60e's? Pretty sure the 4wd output shaft is more prone to breakage

[transbuilderguy]

the 4wd shaft is actually stronger since it is shorter. there may be more load on it.

[bigbob6988]

I heard that since the 2wd shaft is longer it is more likely to twist(like a torsion bar), making it less prone to breaking than the 4wd shafts...

[transbuilderguy]

I heard that since the 2wd shaft is longer it is more likely to twist(like a torsion bar), making it less prone to breaking than the 4wd shafts...
Interesting point...honestly I think I have only seen 3 4l60es with a broken output shaft.

[mgrotel]

I heard that since the 2wd shaft is longer it is more likely to twist(like a torsion bar), making it less prone to breaking than the 4wd shafts...

this is the same that i heard as well. i went ahead and got a billet output shaft, along with a hardened input shaft and drum. considering 5 pinion plants as well. thanks for all of the help guys.

[mgrotel]

regardless, ill be stepping down to 35" tires soon and will have the shifting much less harsh so i think that will be the biggest thing for me, the better shafts are more for piece of mind i think. thanks again

[transbuilderguy]

regardless, ill be stepping down to 35" tires soon and will have the shifting much less harsh so i think that will be the biggest thing for me, the better shafts are more for piece of mind i think. thanks again
yes alot of people think that a hard shifting trans is good well it isnt...a firm fast shifting trans is this is acomplished by expereince with a balance of feed, acumualtion, clutchpack/band clerance, and surface apply area. there is a balance. I personally build mine with large apply, tight clearnce, large feed but keep the acumualtors stock and allow them to cushion the shifts. this is how you keep them together behind high HP cars. I have a few of these 60s running in mid 9s cars and more thani can count running in 10s and 11s all days. not to mention some high hp heavy trucks. as matter fact the truck in the vid in my sig has roughly 400hp and is a full weight c1500 4wd.

[mgrotel]

thanks for all of your help man, i really appreciate it

[GREENSIERRA]

Where did u get the shafts from and how much were they?

[mgrotel]

Www.transmissioncenter.net
Billet output shaft, hardened input shaft, and drum. 3 parts totaled about $1000