My 4l60e build for my turbo car
#82
But its still a 60e, that you will be going back through sooner than later. Or you could just do the 80e and actually enjoy the car, and not cringe everytime you stand in it.
#83
TECH Junkie
What I'm saying is that due to boost valve wear issues in the 80e (very common) extreme pressure can blow the bottom of the drum out (or at the very least crack it and create a huge pressure leak)
I have pictures if you want, but the failure is not from power, its from overpressure caused by bad boost valves.
When you see reverse pressure peg your 600 psi gauge...and stay there...you know pretty fast that its not good for the internals.
#84
I build lots of these each year. I'm well aware the 80e drum is the upgrade used in the 400.
What I'm saying is that due to boost valve wear issues in the 80e (very common) extreme pressure can blow the bottom of the drum out (or at the very least crack it and create a huge pressure leak)
I have pictures if you want, but the failure is not from power, its from overpressure caused by bad boost valves.
When you see reverse pressure peg your 600 psi gauge...and stay there...you know pretty fast that its not good for the internals.
What I'm saying is that due to boost valve wear issues in the 80e (very common) extreme pressure can blow the bottom of the drum out (or at the very least crack it and create a huge pressure leak)
I have pictures if you want, but the failure is not from power, its from overpressure caused by bad boost valves.
When you see reverse pressure peg your 600 psi gauge...and stay there...you know pretty fast that its not good for the internals.
#85
Man I agree. BUT. Judging by the way things looked inside the trans when the output broke, it would have lasted quite a while longer had the output shaft not broken. i'm pretty much at the limit of the amount i'm going to turn it up. My plan was 12psi and below. All i wanted was a 10 second street driver. I've had several of these units hold up to 10 second cars for years. So i dont see why I cant do the same with my own car. This was basically a experiment and a lesson learned. I learned dont cheap out on the shafts. At least it was me it happened to and not a customer. That would be embarrassing. If i get a chance, I'm going to pull it this weekend and make a decision.
#86
TECH Junkie
I say at least pull it and see what actually let go before making big decisions like trans swaps
#88
TECH Addict
I agree, You don't even know for sure what broke yet or the extent of the damage that was done. If seems weird that it would kill the engine. There should have been enough slippage in the torque converter to keep the engine running. Maybe the shock from when the output shaft broke hurt the converter and when you put some power to it you finished it off.
#89
I agree, You don't even know for sure what broke yet or the extent of the damage that was done. If seems weird that it would kill the engine. There should have been enough slippage in the torque converter to keep the engine running. Maybe the shock from when the output shaft broke hurt the converter and when you put some power to it you finished it off.
#90
Been bothering me all weekend to know if it’s definitely the trans or the motor. It being locked it what had me stumped. So I had an epiphany. Dummy, crank it and put in gear real quick. Duh. So I did. Cringing from the noise I rushed to put it in reverse. Nothing. It’s definitely the trans. Whew. I’m ok with that. I think the rotor exploded or the input broke.
#92
TECH Junkie
YIKES! That's aggressive lol
#93
Well I just talked to the owner of patc. I wasn’t expecting much help, but I figured I’d explain the situation and at least ask. It was a waste of my time to be honest. Basically he wanted to refund me $59 for the input shaft and put that towards a sonnax shaft which he sells over priced at $299 which I can get for $220 so I’d be out $20 more that way. I don’t want to use his output shaft either anymore so I thought he’d credit me back on that. Nope. I paid $169 for that shaft. It’s probably a good shaft for a lesser power setup but at this point I don’t want to chance it. Maybe I can sell it, it’s a new factory corvette 4l65 shaft. Which is supposed to be a tick better than the 4l60 shaft. O well. I’m not sure what I want to do at this point. So let me throw this out there to you guys.
Should i I get the sonnax output too?
Should I get a billet pump rotor? I turn it to 7000 on the regular
Should i I get the sonnax output too?
Should I get a billet pump rotor? I turn it to 7000 on the regular
#94
TECH Junkie
Stock 10 vane pump rotor. I've had multiple over 7300. No issues
Keep the 13 vane slide
Keep the 13 vane slide
#95
I posting this in my turbo build thread because everyone was on me about swapping to a 80e. I want to, but I can’t right now. But here’s my explanation I wrote:
Look my dudes. You are right. I should give up on the 60. No doubt. It’s a weak *** piece of ****. However. I like to drive my car. And I’m going insane not driving it. I know you guys are gonna think I’m dumb. And I’m being hard headed. But I have good reasons why. This is how I’m looking at it. I can spend $300 on an input shaft and have my car running. Or I can spend thousands to upgrade. Which would take me a few more months. Car sitting. Wife bitching because it’s in jack stands (I’m not putting it on the ground, it takes 30 minutes to get it up high like I have it...long story) then after I stop breaking transmissions, I’ll start breaks rear end parts. And it’s 3 grand to upgrade everything in the back. I don’t have that kind of cash right now. Things will be getting better for me next year. Without going into details of my financial situation, I’ve had several expenses increase that were unexpected and put a burden on me. Next year some changes are being made. So I’ve got to wing it for now. If I was better off financially, it would be getting an 80e and rear axle upgrades and a built motor. Poor guy on a budget trying to go fast(ish) kind of thing. So bear with me fellas, eventually I’ll get there. Luckily labor is free for me. And a lot of parts I have. So it’s not that bad at this point. I know what I should do, but I’m doing what I CAN do....for now.
Look my dudes. You are right. I should give up on the 60. No doubt. It’s a weak *** piece of ****. However. I like to drive my car. And I’m going insane not driving it. I know you guys are gonna think I’m dumb. And I’m being hard headed. But I have good reasons why. This is how I’m looking at it. I can spend $300 on an input shaft and have my car running. Or I can spend thousands to upgrade. Which would take me a few more months. Car sitting. Wife bitching because it’s in jack stands (I’m not putting it on the ground, it takes 30 minutes to get it up high like I have it...long story) then after I stop breaking transmissions, I’ll start breaks rear end parts. And it’s 3 grand to upgrade everything in the back. I don’t have that kind of cash right now. Things will be getting better for me next year. Without going into details of my financial situation, I’ve had several expenses increase that were unexpected and put a burden on me. Next year some changes are being made. So I’ve got to wing it for now. If I was better off financially, it would be getting an 80e and rear axle upgrades and a built motor. Poor guy on a budget trying to go fast(ish) kind of thing. So bear with me fellas, eventually I’ll get there. Luckily labor is free for me. And a lot of parts I have. So it’s not that bad at this point. I know what I should do, but I’m doing what I CAN do....for now.
#96
TECH Addict
Have you seen this overrun sprag hub from Sonnax? May be one of those while I'm in there parts. This has been the weakest part on my trans so far. I think it has broken 3 times now. I haven't installed it yet, because the last time it broke Sonnax hadn't come out with it yet. Like all Sonnax parts it is a nice looking piece. Once you replace the shafts I feel like the trans will do you proud.
SOX-74574HD - Automatic Transmission Clutch Hubs
SOX-74574HD - Automatic Transmission Clutch Hubs
#97
Have you seen this overrun sprag hub from Sonnax? May be one of those while I'm in there parts. This has been the weakest part on my trans so far. I think it has broken 3 times now. I haven't installed it yet, because the last time it broke Sonnax hadn't come out with it yet. Like all Sonnax parts it is a nice looking piece. Once you replace the shafts I feel like the trans will do you proud.
SOX-74574HD - Automatic Transmission Clutch Hubs
SOX-74574HD - Automatic Transmission Clutch Hubs
yea I saw that. I haven’t had an issue with mine but I think it’s because I’m using the hd 2-3 shift valve that locks the over runs. I talked to a few people and got their input on it and they said it’s not worth doing in my case.
#98
TECH Addict
I also have the HD 2-3 shift valve in mine. My issue could be that the sprag was slipping placing all of the load on the hub, but there is so much metal in there when it breaks that it’s hard to tell which went out 1st.
#99
TECH Junkie
How much power are you making again KFX?
I know stock shafts have been 600+
I know stock shafts have been 600+
#100
well honestly all I can do is guess. Car went 11.20 @125 leaving very soft and my crossover pipe v band clamp was broken so the pipe was leaking bad and I was dropping boost. That’s fixed now. If I had to put a number on it, I’d say 550-600 rear and with the exhaust fixed it should trap about 128-130.