Rebuilt tranny and performance has dropped
#1
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Rebuilt tranny and performance has dropped
I had a good friend of mine rebuild my tranny in my 96 4 x 4. Trans shifts great. Truck runs great. But I have a hard time getting the truck to shift much past 2200 rpms when I hammer the pedal. I did the washer 3k spring mod. I can hit the 3k plus mark sitting in park in a second. ruck has no issues reving up. So it seems like the transmission is keeping the truck from reving. So my question is what in a auto trans would limit the RPMS on shift points? Is it in the valve body? Cable adjustment?
My trans was built with a custom shift kit. Billet converter. And custom valve body.
I occasionally tow my 14K dump trailer will ease. Once the truck gets into 3/lockup, 4/lockup it rips. But 1st and second seem a little sluggish.
This is my first auto dodge diesel. My last two trucks where 5 speeds so having a auto trans and getting it to have good performance is all new to me on these trucks.
Thanks.....
My trans was built with a custom shift kit. Billet converter. And custom valve body.
I occasionally tow my 14K dump trailer will ease. Once the truck gets into 3/lockup, 4/lockup it rips. But 1st and second seem a little sluggish.
This is my first auto dodge diesel. My last two trucks where 5 speeds so having a auto trans and getting it to have good performance is all new to me on these trucks.
Thanks.....
#2
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I had a good friend of mine rebuild my tranny in my 96 4 x 4. Trans shifts great. Truck runs great. But I have a hard time getting the truck to shift much past 2200 rpms when I hammer the pedal. I did the washer 3k spring mod. I can hit the 3k plus mark sitting in park in a second. ruck has no issues reving up. So it seems like the transmission is keeping the truck from reving. So my question is what in a auto trans would limit the RPMS on shift points? Is it in the valve body? Cable adjustment?
My trans was built with a custom shift kit. Billet converter. And custom valve body.
I occasionally tow my 14K dump trailer will ease. Once the truck gets into 3/lockup, 4/lockup it rips. But 1st and second seem a little sluggish.
This is my first auto dodge diesel. My last two trucks where 5 speeds so having a auto trans and getting it to have good performance is all new to me on these trucks.
Thanks.....
My trans was built with a custom shift kit. Billet converter. And custom valve body.
I occasionally tow my 14K dump trailer will ease. Once the truck gets into 3/lockup, 4/lockup it rips. But 1st and second seem a little sluggish.
This is my first auto dodge diesel. My last two trucks where 5 speeds so having a auto trans and getting it to have good performance is all new to me on these trucks.
Thanks.....
#3
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If it rips when the TQ is locked, then it's more than likely the TQ that's making it feel sluggish....as usual! Where does your TQ stall at? Don T's right too, big tires like that suck a lot of power out of a rig. Around that 2200rpm mark you're probably running out of power which is why it won't rev higher.
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Thanks for the input guys. I am going back to 235 or 245 in a few weeks. When I purchased the truck it came with six 35's. So I am just wearing them down to nothing...... LOL.
98 my truck seems to stall around 2100-2200.
So the big tires will make me run out of RMP's quicker? That would be great if I get some more performance from the stock size tires.....
98 my truck seems to stall around 2100-2200.
So the big tires will make me run out of RMP's quicker? That would be great if I get some more performance from the stock size tires.....
#5
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Thanks for the input guys. I am going back to 235 or 245 in a few weeks. When I purchased the truck it came with six 35's. So I am just wearing them down to nothing...... LOL.
98 my truck seems to stall around 2100-2200.
So the big tires will make me run out of RMP's quicker? That would be great if I get some more performance from the stock size tires.....
98 my truck seems to stall around 2100-2200.
So the big tires will make me run out of RMP's quicker? That would be great if I get some more performance from the stock size tires.....
That said, I've never run a Cummins with the higher rpm mods and fuel plate that you have. Of course, you could just be running out of fuel too. Do you have a fuel pressure gauge? Maybe see what the fuel pressure is in those high rpm's...
One thing I know - a stock-stall converter (2000-2200) makes these trucks feel like they have lickerish for a drive shaft!! If you throw a lower stall converter in there, it would help a lot power wise (before lockup), but it wouldn't make the eingine RPM's go any higher before it shifts....
#6
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Just had another thought: Is it possible the new billet TQ has a higher stall than the old one? That would definitely feel like a loss in performance! Where did your old one stall at?
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98 my old converter was the original stock one that was in bad shape. And I made a typo on my previous post. My current billet converter stall around 1800-1900.
I do not have a fuel pressure gauge. But that is next on my list. As well as a larger turbo.....
I will report back once I get the new tires......
I do not have a fuel pressure gauge. But that is next on my list. As well as a larger turbo.....
I will report back once I get the new tires......
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98 my old converter was the original stock one that was in bad shape. And I made a typo on my previous post. My current billet converter stall around 1800-1900.
I do not have a fuel pressure gauge. But that is next on my list. As well as a larger turbo.....
I will report back once I get the new tires......
I do not have a fuel pressure gauge. But that is next on my list. As well as a larger turbo.....
I will report back once I get the new tires......
#10
I had a good friend of mine rebuild my tranny in my 96 4 x 4. Trans shifts great. Truck runs great. But I have a hard time getting the truck to shift much past 2200 rpms when I hammer the pedal. I did the washer 3k spring mod. I can hit the 3k plus mark sitting in park in a second. ruck has no issues reving up. So it seems like the transmission is keeping the truck from reving. So my question is what in a auto trans would limit the RPMS on shift points? Is it in the valve body? Cable adjustment?
My trans was built with a custom shift kit. Billet converter. And custom valve body.
I occasionally tow my 14K dump trailer will ease. Once the truck gets into 3/lockup, 4/lockup it rips. But 1st and second seem a little sluggish.
This is my first auto dodge diesel. My last two trucks where 5 speeds so having a auto trans and getting it to have good performance is all new to me on these trucks.
Thanks.....
My trans was built with a custom shift kit. Billet converter. And custom valve body.
I occasionally tow my 14K dump trailer will ease. Once the truck gets into 3/lockup, 4/lockup it rips. But 1st and second seem a little sluggish.
This is my first auto dodge diesel. My last two trucks where 5 speeds so having a auto trans and getting it to have good performance is all new to me on these trucks.
Thanks.....
First check the cable adjustment. Does it move as soon as the throttle moves?
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Update:
When I did my Dowel Pin fix I set my Crank Speed Sensor at .050. Not sure if a lower number would help with anything so I set it at .037. Truck would not idle. So I bumped the idle back up. Truck seemed to run much better but still shifted a little to soon. Then I open up the holes on the TPS unit and now my truck will shift from 1-2 at 2900 and 2-3 at 2600. Pulls extremely hard. And the shift points have extended out. My truck use to shift into 3rd lockup by 24 mph. Now hits 3rd at 35 and 3rd lockup around 49.
I will hook it up to my buddies scanner to see what my TPS voltage is. But I think my trans issues are solved. And I did not have to buy a new TPS..... for now... LOL
When I did my Dowel Pin fix I set my Crank Speed Sensor at .050. Not sure if a lower number would help with anything so I set it at .037. Truck would not idle. So I bumped the idle back up. Truck seemed to run much better but still shifted a little to soon. Then I open up the holes on the TPS unit and now my truck will shift from 1-2 at 2900 and 2-3 at 2600. Pulls extremely hard. And the shift points have extended out. My truck use to shift into 3rd lockup by 24 mph. Now hits 3rd at 35 and 3rd lockup around 49.
I will hook it up to my buddies scanner to see what my TPS voltage is. But I think my trans issues are solved. And I did not have to buy a new TPS..... for now... LOL
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