transmission line connectors: correct torque

tcell70

Original poster
Member
Apr 22, 2021
3
Norcal
I'm installing a rebuilt transmission to my '05 trailblazer powertrain, and I had to move the transmission line connectors / quick connectors from the old transmission to the new one. Found a torque spec online of 28 ft-lbs, and managed to immediately twist the head off one connector with the torque wrench. Crap. Found an extractor that fit the stub though and the broken connector came right out. I have new ones coming from Napa in the morning, and would prefer _not_ to twist the heads off or use the gutentite protocol

does anyone know the correct spec for torquing these transmission line connectors?
 

mrrsm

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Supporting Donor
Member
Oct 22, 2015
7,750
Tampa Bay Area
Even though the attached 4L60E Transmission Torque Specs PDF says to apply 26-30 Foot Pounds to those Fittings ... Common Sense and Good Judgement by FEEL would suggest:

(1) Ensure that you have the Correct Fitting for your 4L60E Vintage Transmission.
(2) Ensure that there is NO CROSS-THREAD DAMAGE inside the Two Fitting Boss Ports.
(3) Ensure that either the "O" Ring or Thread-Locker is applied to the New Fittings.
(4) If you have ANY Doubts that the Fittings are "Made Of Steel": Apply a Fridge Magnet!
(5) Once the Fitting Bottoms Out...SNUG IT UP ONLY SLIGHTLY MORE...AND STOP.

4L60ECOOLERLINEFITTING.jpg

4L60ECOOLERLINEFITTING2.jpg


More About the Tri-Lobe Retention Clip R&R:

 

Attachments

  • 4L60ETORQUESPECS.pdf
    25.4 KB · Views: 4
  • 4L60-4L60E Catalog.pdf
    815.9 KB · Views: 4
  • 4L60E.pdf
    4 MB · Views: 3
Last edited:

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