Thread: Rear End question

Tweet

Holy crap, i took it on the highway, and, i gotta tell you, it wasn't fun. Rough if anything!! At 120km/h, when i lay off the gas, the gears pull me back like mad(no need for brakes), and when i'm on the gas, after 120, the tranny kicks out for a second, i lay off the gas, and it kicks back in. I test drove it at night time, because there are less cars on the highway, and if sth was to break down, it was to break down then and there. It feels like my transmission isn't strong enough to spin my gears at high speeds. Do you guys think a shift kit for the 700r4 would help, or would wou recommend a tranny swap. I was looking at the 4L60, and the TH350, but i don't know if that's a very wise move. On the streets though, it is crazy fast. After 20km/h, it shifts into second, and i got it to squeak tires in 3rd even. Pretty damn beefy. I was thinking if i was to get a cam, a high rise intake and a better throttle body and injectors, i might be a little more relieved.

Stop! Enough! No mas (Roberto Duran) !

You have asked for advice, and knowledgable people have advised you. You have chosen to ignore them. Learn from this.

You are going about this bass ackwards. You are the first person I have ever seen trying to build a car around an axle ratio. Stop, sit down and take a deep breath. Take a piece of paper and write down what you want your car to be. Your rear end ratio should be what your engine and use needs, not the other way around. When you've figured out what you want, your "great deal" rear end may or may not be what you need. Building performance is planning. You are not planning, you are fixing. Take the time. Decide what you want your car to be and go from there. Changing transmissions is NOT your next step.

Oldman2
Owww!

Okay, I got the tach, I will probably install it tomorrow, and i will call the dealer or my transmission guy for that gaer for the speedo.Ha, discovered a leak, from the oil seal on the diff housing(pinion hole). It's leaking like a bastard, i have to get that fixed too now . Oh well

Do we have an electrical section for questions on how to install a tach???

You don't have one and you want it installed or what? It's really easy to install. U have the negative wire from the coil, and the rest is mix and match.

Originally Posted by oldman2

Stop! Enough! No mas (Roberto Duran) !

You have asked for advice, and knowledgable people have advised you. You have chosen to ignore them. Learn from this.

You are going about this bass ackwards. You are the first person I have ever seen trying to build a car around an axle ratio. Stop, sit down and take a deep breath. Take a piece of paper and write down what you want your car to be. Your rear end ratio should be what your engine and use needs, not the other way around. When you've figured out what you want, your "great deal" rear end may or may not be what you need. Building performance is planning. You are not planning, you are fixing. Take the time. Decide what you want your car to be and go from there. Changing transmissions is NOT your next step.

Oldman2
Owww!

good advice !!!!

The 700/R4 has a 4th gear overall drive ratio of .70. This means that your 4:10 gears are equivalent to 2.88s in high gear. The 700/R4 gives you punch on the low end, and a decent cruise on the high end. The tricky thing about this trans in a specialize application is proper calibration of the TV cable.

With those gears, you DO not want to switch to a TH350. It doesn't have overdrive. Don't switch transmissions. The 700/R4 is a pretty darn good performance transmission. They came stock in a lot of Corvettes.

If your transmission is dragging the engine down when you let off the gas, then the converter isn't unlocking. That's not good.

It feels like my transmission isn't strong enough to spin my gears at high speeds.

I have NO idea what that means.

Ok, i'll remeber that. Is there any way I can test the torque converter?
Well, what i meant by that was that i am at full throttle, but, I am only going 120km/h.
This is how it is, I punch it off the line, it reaches 20km/h, shifts into 2nd, then gets to 40 and it's in 3rd, and then i get to 60, and it already reaches overdrive, and i feel the torque converter locking up. I can't control the lockup, unlessI push the gas harder and it unlocks, and then lay off a little for it to lock up again. When i took it on the highway, It felt like I reached the maximum speed for the tranny. So then, when I lay off the gas, the torque converter is supposed to unlock? Because I feel it unlocking, by the fact that when i get back on the gas after coasting, it revs up, and then it locks up.
I heard the same thing, that the 700R4's are good transmissions, and it is, there is nothing to say. The only problem I am having with it is that it buzzes when it's in gear, and the wheels are stopped.
I will ask the guys at my shop to help me adjust my tv cable, and see how it works.

Originally Posted by Henry Rifle

I have NO idea what that means.

Good. Then it's not just me. My head hurts.

Oldman2

I need a nap.


Don

Oldman, you could use a pill, to make you go to sleep faster.

When i took it on the highway, It felt like I reached the maximum speed for the tranny.

There is no "maximum speed" for the transmission, unless something is broken. Maybe your engine doesn't have enough HP to move that big boat any faster.

Originally Posted by Henry Rifle

There is no "maximum speed" for the transmission, unless something is broken. Maybe your engine doesn't have enough HP to move that big boat any faster.

something found its max. "the motor."

It needs some deeper gears, like 5:13's.



Don