Quote:
Originally Posted by clinebarger
Gear ratios of the 2004R are: 2.74 first, 1.57 second, 1.00 third, .67 fourth.
TH350 ratios= 1.52 first, 2.52 second, 1.00 third.
soo it looks like 1,2,3 gears the same with higher 4th. ...........
I also recommend running a higher numerical gear than a 3:08 with any GM overdrive.
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thanx... for the reply...
I will be running a 200-4r and have 3.73 gears. My truck had 3.08's with the first motor and I got 3.73's. They were great with the 383 stroker I just took out...but turned 3k or so on the freeway. With the 33% OD....I'm thinking 3.73's will be about right....though 4.10's might be better fitted for what I'll be doing with it.[/QUOTE
please keep me posted... thx
Quote:
Originally Posted by llowlife
I'll let you know in a week or 2 if you are still interested. I have a 388 with a 4l80 and 3.08 I suspect I will be going for 3.42 or so this winter just so I can get some more snap but for now it was a posi in teh truck when I bought it.
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in thinking it will be the same in 1st,2nd,3rd with better overdrive.. keep me posted also.. thx
Quote:
Originally Posted by bubba327
Do not forget that tire size makes a difference also.That going from a 235/60/15 (26.1") to a 235/70/15(28") is difference of over 200 RPM at 55 mph. Find a Free online RPM gear calculator and plug in your numbers to get RPM's
In my 64 with the 235/60/15 tires and TH350 with 3.73 gears , I am screaming at 65 mph and freeway 75mph is Impossible.
Just bought a 3.07 rear end to install.
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