r/transmissionbuilding

I'm rebuilding my Dad's 99 GMC Sierra 1500. it has a 5.7 vortec and a 4L60E transmission. i replaced the engine (with 5.7). While the engine and trans was out (for a year or so) the torque converter went missing (still a mystery). I replaced it with a GM33cw torque converter but when i put it in gear made horrible noise it would move but felt like torque converter was slipping. I pulled trans back out and now wondering this is the correct torque converter . I see some recommendations for the GM92. Also wondering if i just didn't get a bad torque converter to start with. any advice would be appreciated this is driving me crazy!

So its my first time messing with a transmission and all I needed to do what change the input shaft.....well ended up I needed to take the tail housing off and a bunch of other stuff. Anyways now it won't go into 1st 2nd or 3rd and im pretty sure that I was able to spin the input shaft before and now its completely stuck. Please any help would be awesome.

Let's say that we have three different engines with the same horsepower and torque, peak power at 7000 rpm, and redline at ​7500.

The key difference are their peak torque rpm:

Engine N.1 peaks at 6200 rpm

Engine N.2, at 5500 rpm

Engine N.3, at 3000 rpm

If I need to couple them each with the same 6-speed transmission, how I should tune them so they can have between them the same lap times around any race track?

Gidday lads,

I’ve got a VZ SS commodore ute with a slipping second gear up top of the revs.
Looks like it’s going to get opened up which is fine,
I’m good to take it out of the vehicle but not really confident rebuilding the transmission.
It gets driven pretty hard daily and I would like to get the most out of it if it’s going to be taken apart.
I just don’t know what I need to tell the transmission guys so they don’t just do the bare minimum to get it running well again.
Money’s not a problem really
Making 295kw at the tires currently but would like to save up some money and install a Harrop supercharger in the future.

Cheers

I have a TH350 in my vehicle (72 FJ40) and the transmission shifts from 1-2 at 4100 rpms 32 mph 2-3 also 4100 rpm not sure mph. I have replaced the modulator, installed a vacuum reservoir to make sure there was plenty of vacuum adjusted the modulator without change. Shift down cable seems free. Any suggestions? It was rebuilt 7 years ago but until recently I hadn't driven it fast enough to notice it before. Is it possible the rebuilder souped it up? When it shifts it will chirp the tirs on my FJ.

I have a Chevy K10 with a Certified Transmissions rebuilt 700r4/4l60e. I have put about 20,000 miles on it and then towed a 4Runner on a car trailer. Not knowing any better I used OD. After towing, the transmission shifts just fine, but once I start climbing a hill with the cruise set, it will try to downshift to 3rd but will make the truck shake and surge until I let off the throttle. The internet doesn’t give me a definite answer so I’m coming here!

Did the 700r4 have a mechanical speedo cable or is it only by wire?

Hello peeps. I bought this car about 2-3 months ago. Long story short got scammed by the guy. Spent lots of money to get the ownership and fix the parts ( check my previous post) to get it road worthy.

Now when i was driving it back home after i bought the car it was shuddering at high speeds so i thought it just might be the axle or tires etc. But after fixing everything the shudder still exists. And for past week or two it struggles to change gear from stop sign or green light on full throttle until i let go off gas then it changes to second gear. And when hit the gas at high speed i smell really foul scent ( might be coolant not sure ) and it shudders bad. Yesterday on my way to dinner with family, this car was tail gaiting me ( i was already going 120kmph/ 75mph ) so i hit the gas to move over the right lane and for good 5-10 seconds i felt i lost power in acceleration then i slowed down till i reached my destination. I just kept it at 100kmph/60mph on my way back home.

Can someone please tell me if i need a new transmission or can i save this one by changing few parts.

Thanks for taking your time to read this. Appreciate it

I have a 1997 dodge ram 2500 4x4 with a 12v cummins and an nv4500, i was driving down the highway at about 65mph when i heard a loud grinding noise and it stopped accelerating, I pushed my clutch in and coasted to a stop. I put it in neutral and restarted it and it stalled immediately as i let the clutch out. It didn’t even try to move it just stalled. It would only run if my clutch was all the way in.
While waiting for a tow truck I tried rowing through the gears and it would go into 1st and 2nd but not 3rd 4th or 5th. I’ve had problems with this transmission before with the fifth gear nut backing off and i have the torque king 4x4 5th gear locking kit on it. But I’m trying to figure out what happened? I’m also trying to figure out if it blew up my transfer case. The t-case still shifts just fine and it seems to turn with no noises. But my concern is if the trans locked up did it break something in the t-case too? And has anyone ever had a problem like this. It feels like it is in 2 gears at once. And im praying that it didn’t completely distroy the trans. There is no broken parts or cracks as far as i can tell.
Has anyone had any experience with this kind of thing happening?