Increasing shift firmness

emitsTech · June 16, 2005

Just a quick question. When programming w/ a Hypertech (or other handheld), If you increase the shift firmess will this damage the transmission at all? And what is it actually changing to increase shift firmness? Thanks!

asilverblazer · June 16, 2005

Should prolong it's life, it increases line pressure, similar to tow/haul.

Bish · June 16, 2005

Just a quick question. When programming w/ a Hypertech (or other handheld), If you increase the shift firmess will this damage the transmission at all? And what is it actually changing to increase shift firmness? Thanks!

<{POST_SNAPBACK}>

It raises line pressure...NOT to be used with a shift kit. I don't think you will have any problem. I agree with asilverblazer that it should actually prolong the life. I ran my Tahoe for 130K with firm shifts via Hypertech with no problems. In fact I believe the firm shift was the reason I got 140K out of my 4L60E.

I rebuild my trans with a Transgo HD2 shift kit and it is better than just increasing line pressure IMO. Plus, I chan chirp 1-2 shift all day if I want

emitsTech · June 16, 2005

Thanks for the info! That's exactly what I was hoping to hear.

rudyho · June 18, 2005

What do you mean the reason you got 140K out of your tranny was because of the HyperTech?

I know 4 guys who have 220K on their 1995-98 silverado's and they haven't even touched the engine or any drive train parts. Mine is riding at 163K with only one change of the plugs, no tune ups, just regular air filter and oil filter changes. Other items have been replaced like tie rods, idler arms, shock but nothing major.

I am a firm believer when you start screwing with stuff it breaks, then it causes other components to break.

Bish · June 18, 2005

What do you mean the reason you got 140K out of your tranny was because of the HyperTech?

I know 4 guys who have 220K on their 1995-98 silverado's and they haven't even touched the engine or any drive train parts. Mine is riding at 163K with only one change of the plugs, no tune ups, just regular air filter and oil filter changes. Other items have been replaced like tie rods, idler arms, shock but nothing major.

I am a firm believer when you start screwing with stuff it breaks, then it causes other components to break.

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I am a firm believer that my trans would have failed much sooner had I not firmed the shifts. This because I tend to drive pretty hard. Firmer shifts result in lest slipping and less heat both of which will hely longevity. When I rebuilt mine, the only things worn were frictions. I belive they would have worn out much sooner had I not increased the firmness of shifts.

Having said that, I think maintenance and driving style are mnore relevant to longevity. A good friend of mine routinely gets over 200K on his trannies but he drives ultra-conservatively. Compare it to a clutch in a manual. 2 people can have the same vehicle but one guy smokes the clutch every 30K and the other has never in 100K. Driving style is the only differenct IMO.

I will agree with you on this point.....once I started modding my truck, I started riding it a lot harder because it is more fun. That definitely won't help with longevity