ez slips transmission in 5th

[CATCRACKER]

ez slips my transmission in 5th? i am the only one that i have heard of that this has happend to. this is not the original clutch. do i have a bad install? how can a bad install cause a weak clutch what can i do.



the ez on level 4 make this truck a beast!



i need help!

 

[y-knot]

I don't think the installation had anything to do with the fact that the clutch is slipping, the installation would effect the clutch operation. I take it , it's operation correctly. The slippage is more the product of clutch design. What kind of replacement did you buy? Was it a "better", or heavier duty version then stock? This is one of those "you want to play, you have to pay" issues.

 

[Big MAK]

5th is where there's the most grip force asked of the clutch under normal driving so it's where it will slip the easiest. In high gears there's more rotations of the drivetrain (wheels, driveshaft) vs. engine (overdrive) -- lower gears are underdrive which have more gripping force at clutch -- unless you're doing something like a burnout and applying more force then normal from drivetrain side of equation. That's why on dynos the truck is tested (typically) in 4th -- they want as close to 'direct' drive as possible.



Not uncommon on any 'turned up' vehicle. Although you probably already know that; since you mention your clutch isn't stock now. What clutch do you have?

 

[4 wheelssmoking]

My truck will do the same if at full throttle above 2000rpm. Is there any adjustment on the clutch? I have done some good dry pavement burnouts without any slippage. I also pull some heavy trailers [6000-10000#] without any problems

 

[CATCRACKER]

y, i have the oem replacement.





my clutch used to slip worse but has gotten better is that possible?

 

[Mad Bomber]

Clutch

There are people that have been able to slide the clutch with just a E-Z. Those stock clutches only hold so much and then you add MORE POWER and then they slip. New trucks stock out of the box can vary 40 to 50 hp,then you add more power and you push it beyond it's holding power. If I were you give Peter @ South bend a call. He'll set you up right. Eric

 

[nickleinonen]

Originally posted by Big MAK

5th is where there's the most grip force asked of the clutch under normal driving so it's where it will slip the easiest. In high gears there's more rotations of the drivetrain (wheels, driveshaft) vs. engine (overdrive) -- lower gears are underdrive which have more gripping force at clutch -- unless you're doing something like a burnout and applying more force then normal from drivetrain side of equation. That's why on dynos the truck is tested (typically) in 4th -- they want as close to 'direct' drive as possible.



Not uncommon on any 'turned up' vehicle. Although you probably already know that; since you mention your clutch isn't stock now. What clutch do you have?

5th is direct drive on the 6 speeds isn't it?

 

[Mad Bomber]

transmission

Keeping your RMP's up will also help you to not slip it. DON'T LUG IT. Keep RPM's in the 1800 to 2500 range. I belive the sweet spot is about 2100 or 2200 RPM's.

 

[Mopar_Mudder]

Well all I can say is that I have never had a problem with mine slipping in the higher gears. The only slipage that I have had is in the shift from 1st to second when pulling my 22,000# + trailer, just couldn't jump on the throttle right away, had to let it get a good hold on things Also it seems that mine has actually gotten better with some miles on it, has 25,000 on it now. But a South Bend will be in my future.

 

[KLockliear]

The stock clutch is good to around 350rwhp. If your truck made 296 (as you have in your sig) stock, with the EZ you are over the magic 350 number. Time for a South Bend.

 

[ttreibel]

Is he slipping a 5-speed NV 4500 or a 6-speed NV-5600?



His SIG is confusing is it a HO or a modded Standard?

 

[nickleinonen]

ETH/DEE = cummins HO / nv5600 6 speed

 

[Mad Bomber]

What?

His sig says it a HO w/ 6speed I belive

 

[Big MAK]

On the six speed; 5th is direct (thanks to mopar_mudder for the ratio chart). The 6spd doesn't add anything to the top or bottom -- just puts them all closer together for more efficient use of the power -- especially 2 to 3 to 4.



2nd <--> 3rd, and 3rd <--> 4th used to be an annoyance towing -- had to redline to keep from lugging in the upshift. And towing hills you'd be floating along in 3rd wanting to go to 4th; then go to 4th and be too high. Closer gates is a good thing for towing.



Someone must have the exact ratios? It's published info of-course. I'll see if I can find it when I get home.

 

[Mopar_Mudder]

Originally posted by Big MAK

On the six speed; 4th is still closest to direct. The 6spd doesn't add anything to the top or bottom -- just puts them all closer together for more efficient use of the power -- especially 2 to 3 to 4.



2nd <--> 3rd, and 3rd <--> 4th used to be an annoyance towing -- had to redline to keep from lugging in the upshift. And towing hills you'd be floating along in 3rd wanting to go to 4th; then go to 4th and be too high. Closer gates is a good thing for towing.



Someone must have the exact ratios? It's published info of-course. I'll see if I can find it when I get home.

5th is direct, 6th is your overdrive. So actually the overdrive would be the hardest on the clutch not the 1:1 ratio. Sounds good but it doesn't exactly work like that, the lower gears seem to be hardest on the clutch, getting a load rolling takes more power then to keep it rolling. Here is another thing, take your foot OFF the clutch pedal, I find on mine that the slightest extra foot pressure on the clutch will make it slip bad. You would be surprised how many people are riding the clutch in their vehicles because they leave their foot rest on the peddle.





Gear Ratios:

1st: 5. 63

2nd: 3. 38

3rd: 2. 04

4th: 1. 39

5th: 1. 00

6th: 0. 73

Reverse: 5. 63

Overall Top Gear Ratio: 2. 72 with 3. 73 axle and 2. 99 with 4. 10 axle

 

[Big MAK]

AH; yes. Thanks. 5th is direct with 6spd.