Do H3's have firm shifting?

[rsm688]

Okay guys well I finally got my H3 project back on the road, I've noticed the transmission shifts pretty firm/quick. Is this typical of the H3s? It definitely shifts firmer than my Dodge Ram. It's not anything harsh or hard but it's definitely not a slow shift.


Thanks,
Spencer

 

[amrg]

Okay guys well I finally got my H3 project back on the road, I've noticed the transmission shifts pretty firm/quick. Is this typical of the H3s? It definitely shifts firmer than my Dodge Ram. It's not anything harsh or hard but it's definitely not a slow shift.


Thanks,
Spencer

If u have a tuned pcm then yes the gear shifts can be quicker/firmer. Otherwise on a stock H3 the gear shifts are usually very soft. I had my pcm reprogrammed on the Alpha and First - Second shift is very harsh ( I opted for a mid level shift firmness), second - third is quick. Before that the shifting was very soft/mushy it felt as if Im slipping into gears!

 

[rsm688]

Any way to tell if the PCM has been tuned? I don't know anything really about the history of the vehicle, it didn't have anything aftermarket other than 315 tires on it when I got it so probably wasn't tuned but who knows. Mine is definitely not mushy/slippy feeling though

 

[amrg]

This depends! Which model year do you have? Is the speedo accurate? (H3s come with 32/33" tires, any other tire wld put ur speedo reading off). If you have a 35" tire and ur speedo is accurate, then its very likely your truck was tuned!

 

[rsm688]

Good call on that, I'll get my GPS out and check my speedo and see if it's off

 

[digglesworth]

My pcm is tuned and my speedo is still off about 3mph @ 55mph. Just fyi.

 

[rsm688]

How far off should the speedo be if nothing has been tuned with 315s/35s? Mine is VERY close using an iphone speedometer. I was dead on to 2mph off max which seemed like it was just a lag in the iphone catching my current speed. When I was cruising at a steady speed it was dead on or 1mph off

 

[Hunner]

You can also have the shift points adjusted on the Ram! Mechanically.

 

[CaseyS]

315s to a 32" tire calibration is 8.4% error based on my real world trials. That is about 5mph at 70. You can also do a 10 mile run on the interstate and check the odometer vs mile markers. 10 miles records about 9.2 on the odometer.

 

[derian06]

You also have to count in that even though they're 315/75/16's they most likely wont be 35" flat. My km2's are around 34 or so i think.

 

[CaseyS]

You also have to count in that even though they're 315/75/16's they most likely wont be 35" flat.

Neither will the stock 265's be 32" flat.

8.4% correction. 265==>315