Anyone have a 3.44 pinion they would like to sell?
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Do you have a 3.77 to trade?
The stock 3.78
I think? Yes.
I think? Yes.
4.22 is stock Pantera. I have a new 3.56
quote:Originally posted by Kirk Evans:
4.22 is stock Pantera. I have a new 3.56
I thought the stock was 3.78???????
Here's the deal. I am running down the highway at 60mph at ~2100-2200 rpm. The engine is a big TQ engine and it feels like it needs to shift. I would love to run this rpm at 70mph instead of 60.
I plugged the numbers into the RBT calculator and it showed I need the 3.44. I have been trying to get a hold of RBT and have gotten no response; phone or email.
I have gotten a response from someone else which is good but I want to make sure I am doing the right thing.
The trans is out and I really want to get the car back together. Last time I had trans work done it took 8 months!
BTW, first gear is darn near useless. Someone told me I needed to change my tire size. I have GR4 15" wheels. It fits the car. Changing rims is not an option.
What is your R-tire DIA? 4.22 is correct--3.44 is quite high. Is your goal to drop the 5th highway RPM?
Something was not adding up so I went to the RBT configurator and took a look. I plugged in the dot on the top that said Pantera and 3.78 came up---WTF? Took a closer look and realized the dot was to the left of Pantera and was for the GT40 so I moved the dot to the right of Pantera and it corrected to 4.22.
That may have happened to you also. Try plugging in a 6.2 fifth and see how it looks. The only down side of the high fifth is it adds load to your 4th-5th thrust washer but it's an easer change than a ring and pinion set-up.
I can do a 5th change in a day or 2 max depending upon cleaning time---about 3 to 4 hours drive time from you.
Something was not adding up so I went to the RBT configurator and took a look. I plugged in the dot on the top that said Pantera and 3.78 came up---WTF? Took a closer look and realized the dot was to the left of Pantera and was for the GT40 so I moved the dot to the right of Pantera and it corrected to 4.22.
That may have happened to you also. Try plugging in a 6.2 fifth and see how it looks. The only down side of the high fifth is it adds load to your 4th-5th thrust washer but it's an easer change than a ring and pinion set-up.
I can do a 5th change in a day or 2 max depending upon cleaning time---about 3 to 4 hours drive time from you.
Your right I plugged the wrong one in.
3.56 would make it right. I would go with you on that one Kirk but I already have been working with PIM on that. He had a 3.56 so that should put me where I need to be.
First is about useless. I am running ~2100 at 60mph. It feels like I need to shift. I would like to be there at 70 MPH.
3.56 would make it right. I would go with you on that one Kirk but I already have been working with PIM on that. He had a 3.56 so that should put me where I need to be.
First is about useless. I am running ~2100 at 60mph. It feels like I need to shift. I would like to be there at 70 MPH.