GM Drivetrain & Suspension Chassis | Transmission| Driveshaft | Gears/Rear End/Differential | Traction Aids

Is this Trans Slipping???

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Old Dec 9, 2008 | 01:38 PM
  #11  
hog's Avatar
hog
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From: Woodstock Ontario Canada
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OK then, you had a serious flare going into 3rd gear. The revs climb really quick as 2nd gear is released before 3rd gear "catches".
You could have smoked the clutches.

What height of tires do you have? Must be around 30-31".

The 4l60e is a crap trans for repeated beatings like you give. Esp if you do so fully loaded.

A mild 4l80e trans will be much more reliable.

You need a stout trans in your heavy truck and spirited driving. I think you will like its closer ratio spacing, and not mind its longer1st gear as you seem to do a lot of high speed driving. Just remember that the 80e has a.75:1 OD ratio while the 60e has a .70:1 OD ratio.

60e with 3.73/30"tire at 100mph (cruise)
2924rpm

same setup but with an 80e
3133
for a 209 rpm difference at 100 mph.

Not a huge rpm gain, but I wanted to show you the difference.

peace
Hog
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Old Dec 9, 2008 | 01:39 PM
  #12  
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hog
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Originally Posted by mdwatts11
Everything looked fine to me in the video. If you go from cruising in 2nd then go WOT right under your shift point, it is going to downshift and rev high quickly and then shift into second again. My nearly stock truck does the same thing. But, I guess there is something wrong since the tranny went out. You have bad luck with trannys. What broke this time?
With about 1 second left in the video, just before the WOT 2-3 shift, the trans flares. You can hear it. Not good.

peace
Hog
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Old Dec 9, 2008 | 02:36 PM
  #13  
Denali Dude's Avatar
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From: UAE , Ajman
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Anyway I will give an update on the trans tommorrow DEXOL is going to open it up since my warranty is busted
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